Convert.ToSingle Methode (System) (2024)

Quelle:

Convert.cs

Quelle:

Convert.cs

Quelle:

Convert.cs

public: static float ToSingle(System::String ^ value, IFormatProvider ^ provider);

public static float ToSingle (string value, IFormatProvider provider);

public static float ToSingle (string? value, IFormatProvider? provider);

static member ToSingle : string * IFormatProvider -> single

Public Shared Function ToSingle (value As String, provider As IFormatProvider) As Single

Parameter

Gibt zurück

Eine Gleitkommazahl mit einfacher Genauigkeit, die der Zahl in value entspricht, oder 0(null), wenn value gleich null ist.

Ausnahmen

Beispiele

Im folgenden Beispiel werden Objekte verwendet IFormatProvider , die die Kulturen en-US und fr-FR darstellen, wenn die Elemente in einem Array numerischer Zeichenfolgen Single in Werte konvertiert werden.

using System;using System.Globalization;public class Example{ public static void Main() { string[] values = { "123456789", "12345.6789", "12 345,6789", "123,456.789", "123 456,789", "123,456,789.0123", "123 456 789,0123", "1.235e12", "1.03221e-05", Double.MaxValue.ToString() }; CultureInfo[] cultures = { new CultureInfo("en-US"), new CultureInfo("fr-FR") }; foreach (CultureInfo culture in cultures) { Console.WriteLine("String -> Single Conversion Using the {0} Culture", culture.Name); foreach (string value in values) { Console.Write("{0,22} -> ", value); try { Console.WriteLine(Convert.ToSingle(value, culture)); } catch (FormatException) { Console.WriteLine("FormatException"); } catch (OverflowException) { Console.WriteLine("OverflowException"); } } Console.WriteLine(); } }}// The example displays the following output:// String -> Single Conversion Using the en-US Culture// 123456789 -> 1.234568E+08// 12345.6789 -> 12345.68// 12 345,6789 -> FormatException// 123,456.789 -> 123456.8// 123 456,789 -> FormatException// 123,456,789.0123 -> 1.234568E+08// 123 456 789,0123 -> FormatException// 1.235e12 -> 1.235E+12// 1.03221e-05 -> 1.03221E-05// 1.79769313486232E+308 -> Overflow//// String -> Single Conversion Using the fr-FR Culture// 123456789 -> 1.234568E+08// 12345.6789 -> FormatException// 12 345,6789 -> 12345.68// 123,456.789 -> FormatException// 123 456,789 -> 123456.8// 123,456,789.0123 -> FormatException// 123 456 789,0123 -> 1.234568E+08// 1.235e12 -> FormatException// 1.03221e-05 -> FormatException// 1.79769313486232E+308 -> FormatException

open Systemopen System.Globalizationlet values = [| "123456789"; "12345.6789"; "12 345,6789" "123,456.789"; "123 456,789"; "123,456,789.0123" "123 456 789,0123"; "1.235e12"; "1.03221e-05" string Double.MaxValue |]let cultures = [| CultureInfo "en-US"; CultureInfo "fr-FR" |]for culture in cultures do printfn $"String -> Single Conversion Using the {culture.Name} Culture" for value in values do printf $"{value,22} -> " try printfn $"{Convert.ToSingle(value, culture)}" with | :? FormatException -> printfn "FormatException" | :? OverflowException -> printfn "OverflowException" printfn ""// The example displays the following output:// String -> Single Conversion Using the en-US Culture// 123456789 -> 1.234568E+08// 12345.6789 -> 12345.68// 12 345,6789 -> FormatException// 123,456.789 -> 123456.8// 123 456,789 -> FormatException// 123,456,789.0123 -> 1.234568E+08// 123 456 789,0123 -> FormatException// 1.235e12 -> 1.235E+12// 1.03221e-05 -> 1.03221E-05// 1.79769313486232E+308 -> Overflow//// String -> Single Conversion Using the fr-FR Culture// 123456789 -> 1.234568E+08// 12345.6789 -> FormatException// 12 345,6789 -> 12345.68// 123,456.789 -> FormatException// 123 456,789 -> 123456.8// 123,456,789.0123 -> FormatException// 123 456 789,0123 -> 1.234568E+08// 1.235e12 -> FormatException// 1.03221e-05 -> FormatException// 1.79769313486232E+308 -> FormatException

Imports System.GlobalizationModule Example Public Sub Main() Dim values() As String = { "123456789", "12345.6789", "12 345,6789", _ "123,456.789", "123 456,789", "123,456,789.0123", _ "123 456 789,0123", "1.235e12", "1.03221e-05", _ Double.MaxValue.ToString() } Dim cultures() As CultureInfo = { New CultureInfo("en-US"), _ New CultureInfo("fr-FR") } For Each culture As CultureInfo In cultures Console.WriteLine("String -> Single Conversion Using the {0} Culture", _ culture.Name) For Each value As String In values Console.Write("{0,22} -> ", value) Try Console.WriteLine(Convert.ToSingle(value, culture)) Catch e As FormatException Console.WriteLine("FormatException") CAtch e As OverflowException Console.WriteLine("Overflow") End Try Next Console.WriteLine() Next End SubEnd Module' The example displays the following output:' String -> Single Conversion Using the en-US Culture' 123456789 -> 1.234568E+08' 12345.6789 -> 12345.68' 12 345,6789 -> FormatException' 123,456.789 -> 123456.8' 123 456,789 -> FormatException' 123,456,789.0123 -> 1.234568E+08' 123 456 789,0123 -> FormatException' 1.235e12 -> 1.235E+12' 1.03221e-05 -> 1.03221E-05' 1.79769313486232E+308 -> Overflow' ' String -> Single Conversion Using the fr-FR Culture' 123456789 -> 1.234568E+08' 12345.6789 -> FormatException' 12 345,6789 -> 12345.68' 123,456.789 -> FormatException' 123 456,789 -> 123456.8' 123,456,789.0123 -> FormatException' 123 456 789,0123 -> 1.234568E+08' 1.235e12 -> FormatException' 1.03221e-05 -> FormatException' 1.79769313486232E+308 -> FormatException

Hinweise

Der Rückgabewert ist das Ergebnis des Aufrufs der Single.Parse -Methode für value.

providerist ein IFormatProvider instance, der ein NumberFormatInfo -Objekt abruft. Das NumberFormatInfo -Objekt stellt kulturspezifische Informationen zum Format von bereit value. Wenn provider ist null, wird für NumberFormatInfo die aktuelle Kultur verwendet.

Wenn Sie keine Ausnahme behandeln möchten, wenn die Konvertierung fehlschlägt, können Sie stattdessen die Single.TryParse -Methode aufrufen. Er gibt einen Boolean Wert zurück, der angibt, ob die Konvertierung erfolgreich war oder fehlgeschlagen ist.

Quelle:

Convert.cs

Quelle:

Convert.cs

Quelle:

Convert.cs

public: static float ToSingle(System::SByte value);

[System.CLSCompliant(false)]public static float ToSingle (sbyte value);

[<System.CLSCompliant(false)>]static member ToSingle : sbyte -> single

Public Shared Function ToSingle (value As SByte) As Single

Parameter

Gibt zurück

Eine 8-Bit-Ganzzahl mit Vorzeichen, die value entspricht.

Attribute

CLSCompliantAttribute

Beispiele

Im folgenden Beispiel wird jedes Element in einem Bytearray mit Vorzeichen in einen Single Wert konvertiert.

sbyte[] numbers = { SByte.MinValue, -23, 0, 17, SByte.MaxValue };float result;foreach (sbyte number in numbers){ result = Convert.ToSingle(number); Console.WriteLine("Converted the {0} value '{1}' to the {2} value {3}.", number.GetType().Name, number, result.GetType().Name, result);}// The example displays the following output:// Converted the SByte value '-128' to the Single value -128.// Converted the SByte value '-23' to the Single value -23.// Converted the SByte value '0' to the Single value 0.// Converted the SByte value '17' to the Single value 17.// Converted the SByte value '127' to the Single value 127.

let numbers = [| SByte.MinValue; -23y; 0y; 17y; SByte.MaxValue |]for number in numbers do let result = Convert.ToSingle number printfn $"Converted the {number.GetType().Name} value {number} to the {result.GetType().Name} value {result}."// The example displays the following output:// Converted the SByte value '-128' to the Single value -128.// Converted the SByte value '-23' to the Single value -23.// Converted the SByte value '0' to the Single value 0.// Converted the SByte value '17' to the Single value 17.// Converted the SByte value '127' to the Single value 127.

Dim numbers() As SByte = { SByte.MinValue, -23, 0, 17, SByte.MaxValue }Dim result As SingleFor Each number As SByte In numbers result = Convert.ToSingle(number) Console.WriteLine("Converted the {0} value '{1}' to the {2} value {3}.", _ number.GetType().Name, number, _ result.GetType().Name, result)Next' The example displays the following output:' Converted the SByte value '-128' to the Single value -128.' Converted the SByte value '-23' to the Single value -23.' Converted the SByte value '0' to the Single value 0.' Converted the SByte value '17' to the Single value 17.' Converted the SByte value '127' to the Single value 127.

Quelle:

Convert.cs

Quelle:

Convert.cs

Quelle:

Convert.cs

public: static float ToSingle(System::Object ^ value, IFormatProvider ^ provider);

public static float ToSingle (object value, IFormatProvider provider);

public static float ToSingle (object? value, IFormatProvider? provider);

static member ToSingle : obj * IFormatProvider -> single

Public Shared Function ToSingle (value As Object, provider As IFormatProvider) As Single

Parameter

Gibt zurück

Eine Gleitkommazahl mit einfacher Genauigkeit, die value entspricht, oder 0(null), wenn value gleich null ist.

Ausnahmen

Beispiele

Im folgenden Beispiel wird eine Temperature -Klasse definiert, die die IConvertible -Schnittstelle implementiert. Die Implementierung der IConvertible.ToSingle -Methode gibt den internen Wert einer privaten Single Variablen zurück, die die Temperatur darstellt.

using System;using System.Globalization;public class Temperature : IConvertible{ private float m_Temp; public Temperature(float temperature) { this.m_Temp = temperature; } public float Celsius { get { return this.m_Temp; } } public float Kelvin { get { return this.m_Temp + 273.15f; } } public float Fahrenheit { get { return (float) Math.Round(this.m_Temp * 9 / 5 + 32, 2); } } public override string ToString() { return m_Temp.ToString("N2") + " °C"; } // IConvertible implementations. public TypeCode GetTypeCode() { return TypeCode.Object; } public bool ToBoolean(IFormatProvider provider) { if (m_Temp == 0) return false; else return true; } public byte ToByte(IFormatProvider provider) { if (m_Temp < Byte.MinValue || m_Temp > Byte.MaxValue) throw new OverflowException(String.Format("{0} is out of range of the Byte type.", this.m_Temp)); else return Convert.ToByte(this.m_Temp); } public char ToChar(IFormatProvider provider) { throw new InvalidCastException("Temperature to Char conversion is not supported."); } public DateTime ToDateTime(IFormatProvider provider) { throw new InvalidCastException("Temperature to DateTime conversion is not supported."); } public decimal ToDecimal(IFormatProvider provider) { return Convert.ToDecimal(this.m_Temp); } public double ToDouble(IFormatProvider provider) { return Convert.ToDouble(this.m_Temp); } public short ToInt16(IFormatProvider provider) { if (this.m_Temp < Int16.MinValue || this.m_Temp > Int16.MaxValue) throw new OverflowException(String.Format("{0} is out of range of the Int16 type.", this.m_Temp)); else return Convert.ToInt16(this.m_Temp); } public int ToInt32(IFormatProvider provider) { if (this.m_Temp < Int32.MinValue || this.m_Temp > Int32.MaxValue) throw new OverflowException(String.Format("{0} is out of range of the Int32 type.", this.m_Temp)); else return Convert.ToInt32(this.m_Temp); } public long ToInt64(IFormatProvider provider) { if (this.m_Temp < Int64.MinValue || this.m_Temp > Int64.MaxValue) throw new OverflowException(String.Format("{0} is out of range of the Int64 type.", this.m_Temp)); else return Convert.ToInt64(this.m_Temp); } public sbyte ToSByte(IFormatProvider provider) { if (this.m_Temp < SByte.MinValue || this.m_Temp > SByte.MaxValue) throw new OverflowException(String.Format("{0} is out of range of the SByte type.", this.m_Temp)); else return Convert.ToSByte(this.m_Temp); } public float ToSingle(IFormatProvider provider) { return this.m_Temp; } public string ToString(IFormatProvider provider) { return m_Temp.ToString("N2", provider) + " °C"; } public object ToType(Type conversionType, IFormatProvider provider) { switch (Type.GetTypeCode(conversionType)) { case TypeCode.Boolean: return this.ToBoolean(null); case TypeCode.Byte: return this.ToByte(null); case TypeCode.Char: return this.ToChar(null); case TypeCode.DateTime: return this.ToDateTime(null); case TypeCode.Decimal: return this.ToDecimal(null); case TypeCode.Double: return this.ToDouble(null); case TypeCode.Int16: return this.ToInt16(null); case TypeCode.Int32: return this.ToInt32(null); case TypeCode.Int64: return this.ToInt64(null); case TypeCode.Object: if (typeof(Temperature).Equals(conversionType)) return this; else throw new InvalidCastException(String.Format("Conversion to a {0} is not supported.", conversionType.Name)); case TypeCode.SByte: return this.ToSByte(null); case TypeCode.Single: return this.ToSingle(null); case TypeCode.String: return this.ToString(provider); case TypeCode.UInt16: return this.ToUInt16(null); case TypeCode.UInt32: return this.ToUInt32(null); case TypeCode.UInt64: return this.ToUInt64(null); default: throw new InvalidCastException(String.Format("Conversion to {0} is not supported.", conversionType.Name)); } } public ushort ToUInt16(IFormatProvider provider) { if (this.m_Temp < UInt16.MinValue || this.m_Temp > UInt16.MaxValue) throw new OverflowException(String.Format("{0} is out of range of the UInt16 type.", this.m_Temp)); else return Convert.ToUInt16(this.m_Temp); } public uint ToUInt32(IFormatProvider provider) { if (this.m_Temp < UInt32.MinValue || this.m_Temp > UInt32.MaxValue) throw new OverflowException(String.Format("{0} is out of range of the UInt32 type.", this.m_Temp)); else return Convert.ToUInt32(this.m_Temp); } public ulong ToUInt64(IFormatProvider provider) { if (this.m_Temp < UInt64.MinValue || this.m_Temp > UInt64.MaxValue) throw new OverflowException(String.Format("{0} is out of range of the UInt64 type.", this.m_Temp)); else return Convert.ToUInt64(this.m_Temp); }}

open Systemtype Temperature(temperature: float32) = member _.Celsius = temperature member _.Kelvin = temperature + 273.15f member _.Fahrenheit = MathF.Round(temperature * 9f / 5f + 32f, 2) override _.ToString() = $"{temperature:N2} °C" // IConvertible implementations. interface IConvertible with member _.GetTypeCode() = TypeCode.Object member _.ToBoolean(provider: IFormatProvider) = temperature <> 0f member _.ToByte(provider: IFormatProvider) = if temperature < float32 Byte.MinValue || temperature > float32 Byte.MaxValue then raise (OverflowException $"{temperature} is out of range of the Byte type.") else Convert.ToByte temperature member _.ToChar(provider: IFormatProvider) = raise (InvalidCastException "Temperature to Char conversion is not supported.") member _.ToDateTime(provider: IFormatProvider) = raise (InvalidCastException "Temperature to DateTime conversion is not supported.") member _.ToDecimal(provider: IFormatProvider) = Convert.ToDecimal temperature member _.ToDouble(provider: IFormatProvider) = Convert.ToDouble temperature member _.ToInt16(provider: IFormatProvider) = if temperature < float32 Int16.MinValue || temperature > float32 Int16.MaxValue then raise (OverflowException $"{temperature} is out of range of the Int16 type.") else Convert.ToInt16 temperature member _.ToInt32(provider: IFormatProvider) = if temperature < float32 Int32.MinValue || temperature > float32 Int32.MaxValue then raise (OverflowException $"{temperature} is out of range of the Int32 type.") else Convert.ToInt32 temperature member _.ToInt64(provider: IFormatProvider) = if float32 temperature < float32 Int64.MinValue || temperature > float32 Int64.MaxValue then raise (OverflowException $"{temperature} is out of range of the Int64 type.") else Convert.ToInt64 temperature member _.ToSByte(provider: IFormatProvider) = if temperature < float32 SByte.MinValue || temperature > float32 SByte.MaxValue then raise (OverflowException $"{temperature} is out of range of the SByte type.") else Convert.ToSByte temperature member _.ToSingle(provider: IFormatProvider) = temperature override _.ToString(provider: IFormatProvider) = temperature.ToString("N2", provider) + " °C" member this.ToType(conversionType: Type, provider: IFormatProvider) = let this = this :> IConvertible match Type.GetTypeCode conversionType with | TypeCode.Boolean -> this.ToBoolean null | TypeCode.Byte -> this.ToByte null | TypeCode.Char -> this.ToChar null | TypeCode.DateTime -> this.ToDateTime null | TypeCode.Decimal -> this.ToDecimal null | TypeCode.Double -> this.ToDouble null | TypeCode.Int16 -> this.ToInt16 null | TypeCode.Int32 -> this.ToInt32 null | TypeCode.Int64 -> this.ToInt64 null | TypeCode.Object -> if typeof<Temperature>.Equals conversionType then this else raise (InvalidCastException $"Conversion to a {conversionType.Name} is not supported.") | TypeCode.SByte -> this.ToSByte null | TypeCode.Single -> this.ToSingle null | TypeCode.String -> this.ToString provider | TypeCode.UInt16 -> this.ToUInt16 null | TypeCode.UInt32 -> this.ToUInt32 null | TypeCode.UInt64 -> this.ToUInt64 null | _ -> raise (InvalidCastException $"Conversion to {conversionType.Name} is not supported.") member _.ToUInt16(provider: IFormatProvider) = if temperature < float32 UInt16.MinValue || temperature > float32 UInt16.MaxValue then raise (OverflowException $"{temperature} is out of range of the UInt16 type.") else Convert.ToUInt16 temperature member _.ToUInt32(provider: IFormatProvider) = if temperature < float32 UInt32.MinValue || temperature > float32 UInt32.MaxValue then raise (OverflowException $"{temperature} is out of range of the UInt32 type.") else Convert.ToUInt32 temperature member _.ToUInt64(provider: IFormatProvider) = if temperature < float32 UInt64.MinValue || temperature > float32 UInt64.MaxValue then raise (OverflowException $"{temperature} is out of range of the UInt64 type.") else Convert.ToUInt64 temperature

Imports System.GlobalizationPublic Class Temperature : Implements IConvertible Private m_Temp As Single Public Sub New(temperature As Single) Me.m_Temp = temperature End Sub Public ReadOnly Property Celsius() As Single Get Return Me.m_Temp End Get End Property Public ReadOnly Property Kelvin() As Single Get Return Me.m_Temp + 273.15F End Get End Property Public ReadOnly Property Fahrenheit() As Single Get Return CSng(Math.Round(Me.m_Temp * 9 / 5 + 32, 2)) End Get End Property Public Overrides Function ToString() As String Return m_Temp.ToString("N2") & " °C" End Function ' IConvertible implementations. Public Function GetTypeCode() As TypeCode _ Implements IConvertible.GetTypeCode Return TypeCode.Object End Function Public Function ToBoolean(provider As IFormatProvider) As Boolean _ Implements IConvertible.ToBoolean If m_Temp = 0 Then Return False Else Return True End If End Function Public Function ToByte(provider As IFormatProvider) As Byte _ Implements IConvertible.ToByte If m_Temp < Byte.MinValue Or m_Temp > Byte.MaxValue Then Throw New OverflowException(String.Format("{0} is out of range of the Byte type.", _ Me.m_Temp)) Else Return Convert.ToByte(Me.m_Temp) End If End Function Public Function ToChar(provider As IFormatProvider) As Char _ Implements IConvertible.ToChar Throw New InvalidCastException("Temperature to Char conversion is not supported.") End Function Public Function ToDateTime(provider As IFormatProvider) As Date _ Implements IConvertible.ToDateTime Throw New InvalidCastException("Temperature to DateTime conversion is not supported.") End Function Public Function ToDecimal(provider As IFormatProvider) As Decimal _ Implements IConvertible.ToDecimal Return Convert.ToDecimal(Me.m_Temp) End Function Public Function ToDouble(provider As IFormatProvider) As Double _ Implements IConvertible.ToDouble Return Convert.ToDouble(Me.m_Temp) End Function Public Function ToInt16(provider As IFormatProvider) As Int16 _ Implements IConvertible.ToInt16 If Me.m_Temp < Int16.MinValue Or Me.m_Temp > Int16.MaxValue Then Throw New OverflowException(String.Format("{0} is out of range of the Int16 type.", _ Me.m_Temp)) Else Return Convert.ToInt16(Me.m_Temp) End If End Function Public Function ToInt32(provider As IFormatProvider) As Int32 _ Implements IConvertible.ToInt32 If Me.m_Temp < Int32.MinValue Or Me.m_Temp > Int32.MaxValue Then Throw New OverflowException(String.Format("{0} is out of range of the Int32 type.", _ Me.m_Temp)) Else Return Convert.ToInt32(Me.m_Temp) End If End Function Public Function ToInt64(provider As IFormatProvider) As Int64 _ Implements IConvertible.ToInt64 If Me.m_Temp < Int64.MinValue Or Me.m_Temp > Int64.MaxValue Then Throw New OverflowException(String.Format("{0} is out of range of the Int64 type.", _ Me.m_Temp)) Else Return Convert.ToInt64(Me.m_Temp) End If End Function Public Function ToSByte(provider As IFormatProvider) As SByte _ Implements IConvertible.ToSByte If Me.m_Temp < SByte.MinValue Or Me.m_Temp > SByte.MaxValue Then Throw New OverflowException(String.Format("{0} is out of range of the SByte type.", _ Me.m_Temp)) Else Return Convert.ToSByte(Me.m_Temp) End If End Function Public Function ToSingle(provider As IFormatProvider) As Single _ Implements IConvertible.ToSingle Return Me.m_Temp End Function Public Overloads Function ToString(provider As IFormatProvider) As String _ Implements IConvertible.ToString Return m_Temp.ToString("N2", provider) & " °C" End Function Public Function ToType(conversionType As Type, provider As IFormatProvider) As Object _ Implements IConvertible.ToType Select Case Type.GetTypeCode(conversionType) Case TypeCode.Boolean Return Me.ToBoolean(Nothing) Case TypeCode.Byte Return Me.ToByte(Nothing) Case TypeCode.Char Return Me.ToChar(Nothing) Case TypeCode.DateTime Return Me.ToDateTime(Nothing) Case TypeCode.Decimal Return Me.ToDecimal(Nothing) Case TypeCode.Double Return Me.ToDouble(Nothing) Case TypeCode.Int16 Return Me.ToInt16(Nothing) Case TypeCode.Int32 Return Me.ToInt32(Nothing) Case TypeCode.Int64 Return Me.ToInt64(Nothing) Case TypeCode.Object If GetType(Temperature).Equals(conversionType) Then Return Me Else Throw New InvalidCastException(String.Format("Conversion to a {0} is not supported.", _ conversionType.Name)) End If Case TypeCode.SByte Return Me.ToSByte(Nothing) Case TypeCode.Single Return Me.ToSingle(Nothing) Case TypeCode.String Return Me.ToString(provider) Case TypeCode.UInt16 Return Me.ToUInt16(Nothing) Case TypeCode.UInt32 Return Me.ToUInt32(Nothing) Case TypeCode.UInt64 Return Me.ToUInt64(Nothing) Case Else Throw New InvalidCastException(String.Format("Conversion to {0} is not supported.", conversionType.Name)) End Select End Function Public Function ToUInt16(provider As IFormatProvider) As UInt16 _ Implements IConvertible.ToUInt16 If Me.m_Temp < UInt16.MinValue Or Me.m_Temp > UInt16.MaxValue Then Throw New OverflowException(String.Format("{0} is out of range of the UInt16 type.", _ Me.m_Temp)) Else Return Convert.ToUInt16(Me.m_Temp) End If End Function Public Function ToUInt32(provider As IFormatProvider) As UInt32 _ Implements IConvertible.ToUInt32 If Me.m_Temp < UInt32.MinValue Or Me.m_Temp > UInt32.MaxValue Then Throw New OverflowException(String.Format("{0} is out of range of the UInt32 type.", _ Me.m_Temp)) Else Return Convert.ToUInt32(Me.m_Temp) End If End Function Public Function ToUInt64(provider As IFormatProvider) As UInt64 _ Implements IConvertible.ToUInt64 If Me.m_Temp < UInt64.MinValue Or Me.m_Temp > UInt64.MaxValue Then Throw New OverflowException(String.Format("{0} is out of range of the UInt64 type.", _ Me.m_Temp)) Else Return Convert.ToUInt64(Me.m_temp) End If End FunctionEnd Class

Das folgende Beispiel veranschaulicht, wie ein Aufruf der Convert.ToSingle(Object, IFormatProvider) -Methode wiederum die IConvertible.ToSingle Implementierung der Temperature -Klasse aufruft.

public class Example{ public static void Main() { Temperature cold = new Temperature(-40); Temperature freezing = new Temperature(0); Temperature boiling = new Temperature(100); Console.WriteLine(Convert.ToInt32(cold, null)); Console.WriteLine(Convert.ToInt32(freezing, null)); Console.WriteLine(Convert.ToDouble(boiling, null)); }}// The example dosplays the following output:// -40// 0// 100

let cold = Temperature -40flet freezing = Temperature 0flet boiling = Temperature 100fprintfn $"{Convert.ToInt32(cold, null)}"printfn $"{Convert.ToInt32(freezing, null)}"printfn $"{Convert.ToDouble(boiling, null)}"// The example dosplays the following output:// -40// 0// 100

Module Example Public Sub Main() Dim cold As New Temperature(-40) Dim freezing As New Temperature(0) Dim boiling As New Temperature(100) Console.WriteLine(Convert.ToInt32(cold, Nothing)) Console.WriteLine(Convert.ToInt32(freezing, Nothing)) Console.WriteLine(Convert.ToDouble(boiling, Nothing)) End SubEnd Module' The example displays the following output:' -40' 0' 100

Hinweise

Der Rückgabewert ist das Ergebnis des Aufrufs der IConvertible.ToSingle -Methode des zugrunde liegenden Typs von value.

provider ermöglicht es dem Benutzer, kulturspezifische Konvertierungsinformationen zum Inhalt von valueanzugeben. Wenn beispielsweise eine String ist, value die eine Zahl darstellt, kann kulturspezifische Informationen über die Notation bereitstellen, provider die zur Darstellung dieser Zahl verwendet wird.

Die Basistypen ignorieren provider. Der Parameter kann jedoch verwendet werden, wenn es sich um value einen benutzerdefinierten Typ handelt, der die IConvertible Schnittstelle implementiert.

Quelle:

Convert.cs

Quelle:

Convert.cs

Quelle:

Convert.cs

public: static float ToSingle(System::UInt64 value);

[System.CLSCompliant(false)]public static float ToSingle (ulong value);

[<System.CLSCompliant(false)>]static member ToSingle : uint64 -> single

Public Shared Function ToSingle (value As ULong) As Single

Parameter

Gibt zurück

Eine Gleitkommazahl mit einfacher Genauigkeit, die value entspricht.

Attribute

CLSCompliantAttribute

Beispiele

Im folgenden Beispiel wird jedes Element in einem Array von ganzen Zahlen ohne Vorzeichen in einen Single Wert konvertiert.

ulong[] numbers = { UInt64.MinValue, 121, 12345, UInt64.MaxValue };float result;foreach (ulong number in numbers){ result = Convert.ToSingle(number); Console.WriteLine("Converted the {0} value '{1}' to the {2} value {3}.", number.GetType().Name, number, result.GetType().Name, result);}// The example displays the following output:// Converted the UInt64 value '0' to the Single value 0.// Converted the UInt64 value '121' to the Single value 121.// Converted the UInt64 value '12345' to the Single value 12345.// Converted the UInt64 value '18446744073709551615' to the Single value 1.844674E+19.

let numbers = [| UInt64.MinValue; 121uL; 12345uL; UInt64.MaxValue |]for number in numbers do let result = Convert.ToSingle number printfn $"Converted the {number.GetType().Name} value {number} to the {result.GetType().Name} value {result}."// The example displays the following output:// Converted the UInt64 value '0' to the Single value 0.// Converted the UInt64 value '121' to the Single value 121.// Converted the UInt64 value '12345' to the Single value 12345.// Converted the UInt64 value '18446744073709551615' to the Single value 1.844674E+19.

Dim numbers() As ULong = { UInt64.MinValue, 121, 12345, UInt64.MaxValue }Dim result As SingleFor Each number As ULong In numbers result = Convert.ToSingle(number) Console.WriteLine("Converted the {0} value '{1}' to the {2} value {3}.", _ number.GetType().Name, number, _ result.GetType().Name, result)Next' The example displays the following output:' Converted the UInt64 value '0' to the Single value 0.' Converted the UInt64 value '121' to the Single value 121.' Converted the UInt64 value '12345' to the Single value 12345.' Converted the UInt64 value '18446744073709551615' to the Single value 1.844674E+19.

Quelle:

Convert.cs

Quelle:

Convert.cs

Quelle:

Convert.cs

public: static float ToSingle(System::UInt32 value);

[System.CLSCompliant(false)]public static float ToSingle (uint value);

[<System.CLSCompliant(false)>]static member ToSingle : uint32 -> single

Public Shared Function ToSingle (value As UInteger) As Single

Parameter

Gibt zurück

Eine Gleitkommazahl mit einfacher Genauigkeit, die value entspricht.

Attribute

CLSCompliantAttribute

Beispiele

Im folgenden Beispiel wird jedes Element in einem Array von ganzen Zahlen ohne Vorzeichen in einen Single Wert konvertiert.

uint[] numbers = { UInt32.MinValue, 121, 12345, UInt32.MaxValue };float result;foreach (uint number in numbers){ result = Convert.ToSingle(number); Console.WriteLine("Converted the {0} value '{1}' to the {2} value {3}.", number.GetType().Name, number, result.GetType().Name, result);}// The example displays the following output:// Converted the UInt32 value '0' to the Single value 0.// Converted the UInt32 value '121' to the Single value 121.// Converted the UInt32 value '12345' to the Single value 12345.// Converted the UInt32 value '4294967295' to the Single value 4.294967E+09.

let numbers = [| UInt32.MinValue; 121u; 12345u; UInt32.MaxValue |]for number in numbers do let result = Convert.ToSingle number printfn $"Converted the {number.GetType().Name} value {number} to the {result.GetType().Name} value {result}."// The example displays the following output:// Converted the UInt32 value '0' to the Single value 0.// Converted the UInt32 value '121' to the Single value 121.// Converted the UInt32 value '12345' to the Single value 12345.// Converted the UInt32 value '4294967295' to the Single value 4.294967E+09.

 Dim numbers() As UInteger = { UInt32.MinValue, 121, 12345, UInt32.MaxValue } Dim result As Single For Each number As UInteger In numbers result = Convert.ToSingle(number) Console.WriteLine("Converted the {0} value '{1}' to the {2} value {3}.", _ number.GetType().Name, number, _ result.GetType().Name, result) Next ' The example displays the following output:' Converted the UInt32 value '0' to the Single value 0.' Converted the UInt32 value '121' to the Single value 121.' Converted the UInt32 value '12345' to the Single value 12345.' Converted the UInt32 value '4294967295' to the Single value 4.294967E+09.

Quelle:

Convert.cs

Quelle:

Convert.cs

Quelle:

Convert.cs

public: static float ToSingle(System::String ^ value);

public static float ToSingle (string value);

public static float ToSingle (string? value);

static member ToSingle : string -> single

Public Shared Function ToSingle (value As String) As Single

Parameter

Gibt zurück

Eine Gleitkommazahl mit einfacher Genauigkeit, die der Zahl in value entspricht, oder 0(null), wenn value gleich null ist.

Ausnahmen

Beispiele

Im folgenden Beispiel wird versucht, jedes Element in einem Array numerischer Zeichenfolgen in einen Single Wert zu konvertieren.

string[] values= { "-1,035.77219", "1AFF", "1e-35", "1.63f", "1,635,592,999,999,999,999,999,999", "-17.455", "190.34001", "1.29e325"};float result;foreach (string value in values){ try { result = Convert.ToSingle(value); Console.WriteLine("Converted the {0} value '{1}' to the {2} value {3}.", value.GetType().Name, value, result.GetType().Name, result); } catch (FormatException) { Console.WriteLine("Unable to convert '{0}' to a Single.", value); } catch (OverflowException) { Console.WriteLine("'{0}' is outside the range of a Single.", value); }}// The example displays the following output:// Converted the String value '-1,035.77219' to the Single value -1035.772.// Unable to convert '1AFF' to a Single.// Converted the String value '1e-35' to the Single value 1E-35.// Unable to convert '1.63f' to a Single.// Converted the String value '1,635,592,999,999,999,999,999,999' to the Single value 1.635593E+24.// Converted the String value '-17.455' to the Single value -17.455.// Converted the String value '190.34001' to the Single value 190.34.// 1.29e325' is outside the range of a Single.

let values = [| "-1,035.77219"; "1AFF"; "1e-35"; "1.63f"; "1,635,592,999,999,999,999,999,999" "-17.455"; "190.34001"; "1.29e325" |]for value in values do try let result = Convert.ToSingle value printfn $"Converted the {value.GetType().Name} value {value} to the {result.GetType().Name} value {result}." with | :? FormatException -> printfn $"Unable to convert '{value}' to a Single." | :? OverflowException -> printfn $"'{value}' is outside the range of a Single."// The example displays the following output:// Converted the String value '-1,035.77219' to the Single value -1035.772.// Unable to convert '1AFF' to a Single.// Converted the String value '1e-35' to the Single value 1E-35.// Unable to convert '1.63f' to a Single.// Converted the String value '1,635,592,999,999,999,999,999,999' to the Single value 1.635593E+24.// Converted the String value '-17.455' to the Single value -17.455.// Converted the String value '190.34001' to the Single value 190.34.// 1.29e325' is outside the range of a Single.

Dim values() As String = { "-1,035.77219", "1AFF", "1e-35", "1.63f", "1,635,592,999,999,999,999,999,999", "-17.455", "190.34001", "1.29e325"}Dim result As SingleFor Each value As String In values Try result = Convert.ToSingle(value) Console.WriteLine("Converted the {0} value '{1}' to the {2} value {3}.", value.GetType().Name, value, _ result.GetType().Name, result) Catch e As FormatException Console.WriteLine("Unable to convert '{0}' to a Single.", value) Catch e As OverflowException Console.WriteLine("'{0}' is outside the range of a Single.", value) End TryNext' The example displays the following output:' Converted the String value '-1,035.77219' to the Single value -1035.772.' Unable to convert '1AFF' to a Single.' Converted the String value '1e-35' to the Single value 1E-35.' Unable to convert '1.63f' to a Single.' Converted the String value '1,635,592,999,999,999,999,999,999' to the Single value 1.635593E+24.' Converted the String value '-17.455' to the Single value -17.455.' Converted the String value '190.34001' to the Single value 190.34.' '1.29e325' is outside the range of a Single.

Hinweise

Die Verwendung der ToSingle(String) -Methode entspricht der Übergabe value an die Single.Parse(String) -Methode. value wird mithilfe der Formatierungskonventionen der aktuellen Kultur interpretiert.

Wenn Sie keine Ausnahme behandeln möchten, wenn die Konvertierung fehlschlägt, können Sie stattdessen die Single.TryParse -Methode aufrufen. Er gibt einen Boolean Wert zurück, der angibt, ob die Konvertierung erfolgreich war oder fehlgeschlagen ist.

Quelle:

Convert.cs

Quelle:

Convert.cs

Quelle:

Convert.cs

public: static float ToSingle(float value);

public static float ToSingle (float value);

static member ToSingle : single -> single

Public Shared Function ToSingle (value As Single) As Single

Parameter

Gibt zurück

value wird unverändert zurückgegeben.

Weitere Informationen

• Single

Quelle:

Convert.cs

Quelle:

Convert.cs

Quelle:

Convert.cs

public: static float ToSingle(System::Object ^ value);

public static float ToSingle (object value);

public static float ToSingle (object? value);

static member ToSingle : obj -> single

Public Shared Function ToSingle (value As Object) As Single

Parameter

Gibt zurück

Eine Gleitkommazahl mit einfacher Genauigkeit, die value entspricht, oder 0(null), wenn value gleich null ist.

Ausnahmen

Beispiele

Im folgenden Beispiel wird versucht, jedes Element in einem Objektarray in einen Single Wert zu konvertieren.

object[] values = { true, 'a', 123, 1.764e32, "9.78", "1e-02", 1.67e03, "A100", "1,033.67", DateTime.Now, Decimal.MaxValue };float result;foreach (object value in values){ try { result = Convert.ToSingle(value); Console.WriteLine("Converted the {0} value '{1}' to the {2} value {3}.", value.GetType().Name, value, result.GetType().Name, result); } catch (FormatException) { Console.WriteLine("The {0} value {1} is not recognized as a valid Single value.", value.GetType().Name, value); } catch (OverflowException) { Console.WriteLine("The {0} value {1} is outside the range of the Single type.", value.GetType().Name, value); } catch (InvalidCastException) { Console.WriteLine("Conversion of the {0} value {1} to a Single is not supported.", value.GetType().Name, value); }}// The example displays the following output:// Converted the Boolean value 'True' to the Single value 1.// Conversion of the Char value a to a Single is not supported.// Converted the Int32 value '123' to the Single value 123.// Converted the Double value '1.764E+32' to the Single value 1.764E+32.// Converted the String value '9.78' to the Single value 9.78.// Converted the String value '1e-02' to the Single value 0.01.// Converted the Double value '1670' to the Single value 1670.// The String value A100 is not recognized as a valid Single value.// Converted the String value '1,033.67' to the Single value 1033.67.// Conversion of the DateTime value 11/7/2008 08:02:35 AM to a Single is not supported.// Converted the Decimal value '79228162514264337593543950335' to the Single value 7.922816E+28.

let values: obj[] = [| true; 'a'; 123; 1.764e32; "9.78"; "1e-02"; 1.67e03; "A100"; "1,033.67"; DateTime.Now; Decimal.MaxValue |]for value in values do try let result = Convert.ToSingle value printfn $"Converted the {value.GetType().Name} value {value} to the {result.GetType().Name} value {result}." with | :? FormatException -> printfn $"The {value.GetType().Name} value {value} is not recognized as a valid Single value." | :? OverflowException -> printfn $"The {value.GetType().Name} value {value} is outside the range of the Single type." | :? InvalidCastException -> printfn $"Conversion of the {value.GetType().Name} value {value} to a Single is not supported."// The example displays the following output:// Converted the Boolean value 'True' to the Single value 1.// Conversion of the Char value a to a Single is not supported.// Converted the Int32 value '123' to the Single value 123.// Converted the Double value '1.764E+32' to the Single value 1.764E+32.// Converted the String value '9.78' to the Single value 9.78.// Converted the String value '1e-02' to the Single value 0.01.// Converted the Double value '1670' to the Single value 1670.// The String value A100 is not recognized as a valid Single value.// Converted the String value '1,033.67' to the Single value 1033.67.// Conversion of the DateTime value 11/7/2008 08:02:35 AM to a Single is not supported.// Converted the Decimal value '79228162514264337593543950335' to the Single value 7.922816E+28.

Dim values() As Object = { True, "a"c, 123, 1.764e32, "9.78", "1e-02", _ 1.67e03, "A100", "1,033.67", Date.Now, _ Decimal.MaxValue }Dim result As SingleFor Each value As Object In values Try result = Convert.ToSingle(value) Console.WriteLine("Converted the {0} value '{1}' to the {2} value {3}.", _ value.GetType().Name, value, _ result.GetType().Name, result) Catch e As FormatException Console.WriteLine("The {0} value {1} is not recognized as a valid Single value.", _ value.GetType().Name, value) Catch e As OverflowException Console.WriteLine("The {0} value {1} is outside the range of the Single type.", _ value.GetType().Name, value) Catch e As InvalidCastException Console.WriteLine("Conversion of the {0} value {1} to a Single is not supported.", _ value.GetType().Name, value) End TryNext' The example displays the following output:' Converted the Boolean value 'True' to the Single value 1.' Conversion of the Char value a to a Single is not supported.' Converted the Int32 value '123' to the Single value 123.' Converted the Double value '1.764E+32' to the Single value 1.764E+32.' Converted the String value '9.78' to the Single value 9.78.' Converted the String value '1e-02' to the Single value 0.01.' Converted the Double value '1670' to the Single value 1670.' The String value A100 is not recognized as a valid Single value.' Converted the String value '1,033.67' to the Single value 1033.67.' Conversion of the DateTime value 11/7/2008 07:56:24 AM to a Single is not supported.' Converted the Decimal value '79228162514264337593543950335' to the Single value 7.922816E+28.

Hinweise

Der Rückgabewert ist das Ergebnis des Aufrufs der IConvertible.ToSingle -Methode des zugrunde liegenden Typs von value.

Quelle:

Convert.cs

Quelle:

Convert.cs

Quelle:

Convert.cs

public: static float ToSingle(System::UInt16 value);

[System.CLSCompliant(false)]public static float ToSingle (ushort value);

[<System.CLSCompliant(false)>]static member ToSingle : uint16 -> single

Public Shared Function ToSingle (value As UShort) As Single

Parameter

Gibt zurück

Eine Gleitkommazahl mit einfacher Genauigkeit, die value entspricht.

Attribute

CLSCompliantAttribute

Beispiele

Im folgenden Beispiel werden jedes Element in einem Array von unsignierten 16-Bit-Ganzzahlen in einen Single Wert konvertiert.

ushort[] numbers = { UInt16.MinValue, 121, 12345, UInt16.MaxValue };float result;foreach (ushort number in numbers){ result = Convert.ToSingle(number); Console.WriteLine("Converted the {0} value '{1}' to the {2} value {3}.", number.GetType().Name, number, result.GetType().Name, result);}// The example displays the following output:// Converted the UInt16 value '0' to the Single value 0.// Converted the UInt16 value '121' to the Single value 121.// Converted the UInt16 value '12345' to the Single value 12345.// Converted the UInt16 value '65535' to the Single value 65535.

let numbers = [| UInt16.MinValue; 121us; 12345us; UInt16.MaxValue |]for number in numbers do let result = Convert.ToSingle number printfn $"Converted the {number.GetType().Name} value {number} to the {result.GetType().Name} value {result}."// The example displays the following output:// Converted the UInt16 value '0' to the Single value 0.// Converted the UInt16 value '121' to the Single value 121.// Converted the UInt16 value '12345' to the Single value 12345.// Converted the UInt16 value '65535' to the Single value 65535.

Dim numbers() As UShort = { UInt16.MinValue, 121, 12345, UInt16.MaxValue }Dim result As SingleFor Each number As UShort In numbers result = Convert.ToSingle(number) Console.WriteLine("Converted the {0} value '{1}' to the {2} value {3}.", _ number.GetType().Name, number, _ result.GetType().Name, result)Next' The example displays the following output:' Converted the UInt16 value '0' to the Single value 0.' Converted the UInt16 value '121' to the Single value 121.' Converted the UInt16 value '12345' to the Single value 12345.' Converted the UInt16 value '65535' to the Single value 65535.

Quelle:

Convert.cs

Quelle:

Convert.cs

Quelle:

Convert.cs

public: static float ToSingle(int value);

public static float ToSingle (int value);

static member ToSingle : int -> single

Public Shared Function ToSingle (value As Integer) As Single

Parameter

Gibt zurück

Eine Gleitkommazahl mit einfacher Genauigkeit, die value entspricht.

Beispiele

Im folgenden Beispiel wird jedes Element in einem ganzzahligen Array in einen Single Wert konvertiert.

int[] numbers = { Int32.MinValue, -1000, 0, 1000, Int32.MaxValue };float result;foreach (int number in numbers){ result = Convert.ToSingle(number); Console.WriteLine("Converted the {0} value '{1}' to the {2} value {3}.", number.GetType().Name, number, result.GetType().Name, result);}// The example displays the following output:// Converted the Int32 value '-2147483648' to the Single value -2.147484E+09.// Converted the Int32 value '-1000' to the Single value -1000.// Converted the Int32 value '0' to the Single value 0.// Converted the Int32 value '1000' to the Single value 1000.// Converted the Int32 value '2147483647' to the Single value 2.147484E+09.

let numbers = [| Int32.MinValue; -1000; 0; 1000; Int32.MaxValue |]for number in numbers do let result = Convert.ToSingle number printfn $"Converted the {number.GetType().Name} value {number} to the {result.GetType().Name} value {result}."// The example displays the following output:// Converted the Int32 value '-2147483648' to the Single value -2.147484E+09.// Converted the Int32 value '-1000' to the Single value -1000.// Converted the Int32 value '0' to the Single value 0.// Converted the Int32 value '1000' to the Single value 1000.// Converted the Int32 value '2147483647' to the Single value 2.147484E+09.

Dim numbers() As Integer = { Int32.MinValue, -1000, 0, 1000, Int32.MaxValue }Dim result As SingleFor Each number As Integer In numbers result = Convert.ToSingle(number) Console.WriteLine("Converted the {0} value '{1}' to the {2} value {3}.", _ number.GetType().Name, number, _ result.GetType().Name, result)Next' The example displays the following output:' Converted the Int32 value '-2147483648' to the Single value -2.147484E+09.' Converted the Int32 value '-1000' to the Single value -1000.' Converted the Int32 value '0' to the Single value 0.' Converted the Int32 value '1000' to the Single value 1000.' Converted the Int32 value '2147483647' to the Single value 2.147484E+09.

Quelle:

Convert.cs

Quelle:

Convert.cs

Quelle:

Convert.cs

public: static float ToSingle(short value);

public static float ToSingle (short value);

static member ToSingle : int16 -> single

Public Shared Function ToSingle (value As Short) As Single

Parameter

Gibt zurück

Eine Gleitkommazahl mit einfacher Genauigkeit, die value entspricht.

Beispiele

Im folgenden Beispiel werden jedes Element in einem Array von 16-Bit-Ganzzahlen in einen Single Wert konvertiert.

short[] numbers = { Int16.MinValue, -1032, 0, 192, Int16.MaxValue };float result;foreach (short number in numbers){ result = Convert.ToSingle(number); Console.WriteLine("Converted the {0} value '{1}' to the {2} value {3}.", number.GetType().Name, number, result.GetType().Name, result);}// The example displays the following output:// Converted the Int16 value '-32768' to the Single value -32768.// Converted the Int16 value '-1032' to the Single value -1032.// Converted the Int16 value '0' to the Single value 0.// Converted the Int16 value '192' to the Single value 192.// Converted the Int16 value '32767' to the Single value 32767.

let numbers = [| Int16.MinValue; -1032s; 0s; 192s; Int16.MaxValue |]for number in numbers do let result = Convert.ToSingle number printfn $"Converted the {number.GetType().Name} value {number} to the {result.GetType().Name} value {result}."// The example displays the following output:// Converted the Int16 value '-32768' to the Single value -32768.// Converted the Int16 value '-1032' to the Single value -1032.// Converted the Int16 value '0' to the Single value 0.// Converted the Int16 value '192' to the Single value 192.// Converted the Int16 value '32767' to the Single value 32767.

Dim numbers() As Short = { Int16.MinValue, -1032, 0, 192, Int16.MaxValue }Dim result As SingleFor Each number As Short In numbers result = Convert.ToSingle(number) Console.WriteLine("Converted the {0} value '{1}' to the {2} value {3}.", _ number.GetType().Name, number, _ result.GetType().Name, result)Next' The example displays the following output:' Converted the Int16 value '-32768' to the Single value -32768.' Converted the Int16 value '-1032' to the Single value -1032.' Converted the Int16 value '0' to the Single value 0.' Converted the Int16 value '192' to the Single value 192.' Converted the Int16 value '32767' to the Single value 32767.

Quelle:

Convert.cs

Quelle:

Convert.cs

Quelle:

Convert.cs

public: static float ToSingle(double value);

public static float ToSingle (double value);

static member ToSingle : double -> single

Public Shared Function ToSingle (value As Double) As Single

Parameter

Gibt zurück

Eine Gleitkommazahl mit einfacher Genauigkeit, die value entspricht.

value wird auf den nächsten Wert gerundet. Der Wert 2,345 wird z.B. bei einer Rundung auf zwei Dezimalziffern zu 2,34, und der Wert 2,355 wird zu 2,36.

Beispiele

Im folgenden Beispiel werden jedes Element in einem Array von Double Werten in einen Single Wert konvertiert.

double[] values = { Double.MinValue, -1.38e10, -1023.299, -12.98, 0, 9.113e-16, 103.919, 17834.191, Double.MaxValue };float result;foreach (double value in values){ result = Convert.ToSingle(value); Console.WriteLine("Converted the {0} value '{1}' to the {2} value {3}.", value.GetType().Name, value, result.GetType().Name, result);}// The example displays the following output:// Converted the Double value '-1.79769313486232E+308' to the Single value -Infinity.// Converted the Double value '-13800000000' to the Single value -1.38E+10.// Converted the Double value '-1023.299' to the Single value -1023.299.// Converted the Double value '-12.98' to the Single value -12.98.// Converted the Double value '0' to the Single value 0.// Converted the Double value '9.113E-16' to the Single value 9.113E-16.// Converted the Double value '103.919' to the Single value 103.919.// Converted the Double value '17834.191' to the Single value 17834.19.// Converted the Double value '1.79769313486232E+308' to the Single value Infinity.

let values = [| Double.MinValue; -1.38e10; -1023.299; -12.98; 0; 9.113e-16; 103.919; 17834.191; Double.MaxValue |]for value in values do let result = Convert.ToSingle value printfn $"Converted the {value.GetType().Name} value {value} to the {result.GetType().Name} value {result}."// The example displays the following output:// Converted the Double value '-1.79769313486232E+308' to the Single value -Infinity.// Converted the Double value '-13800000000' to the Single value -1.38E+10.// Converted the Double value '-1023.299' to the Single value -1023.299.// Converted the Double value '-12.98' to the Single value -12.98.// Converted the Double value '0' to the Single value 0.// Converted the Double value '9.113E-16' to the Single value 9.113E-16.// Converted the Double value '103.919' to the Single value 103.919.// Converted the Double value '17834.191' to the Single value 17834.19.// Converted the Double value '1.79769313486232E+308' to the Single value Infinity.

Dim values() As Double = { Double.MinValue, -1.38e10, -1023.299, -12.98, _ 0, 9.113e-16, 103.919, 17834.191, Double.MaxValue }Dim result As SingleFor Each value As Double In values result = Convert.ToSingle(value) Console.WriteLine("Converted the {0} value '{1}' to the {2} value {3}.", _ value.GetType().Name, value, _ result.GetType().Name, result)Next' The example displays the following output:' Converted the Double value '-1.79769313486232E+308' to the Single value -Infinity.' Converted the Double value '-13800000000' to the Single value -1.38E+10.' Converted the Double value '-1023.299' to the Single value -1023.299.' Converted the Double value '-12.98' to the Single value -12.98.' Converted the Double value '0' to the Single value 0.' Converted the Double value '9.113E-16' to the Single value 9.113E-16.' Converted the Double value '103.919' to the Single value 103.919.' Converted the Double value '17834.191' to the Single value 17834.19.' Converted the Double value '1.79769313486232E+308' to the Single value Infinity.

Weitere Informationen

• Double
• Round

Quelle:

Convert.cs

Quelle:

Convert.cs

Quelle:

Convert.cs

public: static float ToSingle(System::Decimal value);

public static float ToSingle (decimal value);

static member ToSingle : decimal -> single

Public Shared Function ToSingle (value As Decimal) As Single

Parameter

Gibt zurück

Eine Gleitkommazahl mit einfacher Genauigkeit, die value entspricht.

value wird auf den nächsten Wert gerundet. Der Wert 2,345 wird z.B. bei einer Rundung auf zwei Dezimalziffern zu 2,34, und der Wert 2,355 wird zu 2,36.

Beispiele

Im folgenden Beispiel werden jedes Element in einem Array von Decimal Werten in einen Single Wert konvertiert.

decimal[] values = { Decimal.MinValue, -1034.23m, -12m, 0m, 147m, 199.55m, 9214.16m, Decimal.MaxValue };float result;foreach (var value in values){ result = Convert.ToSingle(value); Console.WriteLine("Converted the {0} value '{1}' to the {2} value {3}.", value.GetType().Name, value, result.GetType().Name, result);}// The example displays the following output:// Converted the Decimal value '-79228162514264337593543950335' to the Single value -7.9228163E+28.// Converted the Decimal value '-1034.23' to the Single value -1034.23.// Converted the Decimal value '-12' to the Single value -12.// Converted the Decimal value '0' to the Single value 0.// Converted the Decimal value '147' to the Single value 147.// Converted the Decimal value '199.55' to the Single value 199.55.// Converted the Decimal value '9214.16' to the Single value 9214.16.// Converted the Decimal value '79228162514264337593543950335' to the Single value 7.9228163E+28.

let values = [| Decimal.MinValue; -1034.23m; -12m; 0m; 147m; 199.55m; 9214.16m; Decimal.MaxValue |]for value in values do let result = Convert.ToSingle value printfn $"Converted the {value.GetType().Name} value {value} to the {result.GetType().Name} value {result}."// The example displays the following output:// Converted the Decimal value '-79228162514264337593543950335' to the Single value -7.9228163E+28.// Converted the Decimal value '-1034.23' to the Single value -1034.23.// Converted the Decimal value '-12' to the Single value -12.// Converted the Decimal value '0' to the Single value 0.// Converted the Decimal value '147' to the Single value 147.// Converted the Decimal value '199.55' to the Single value 199.55.// Converted the Decimal value '9214.16' to the Single value 9214.16.// Converted the Decimal value '79228162514264337593543950335' to the Single value 7.9228163E+28.

Dim values() As Decimal = { Decimal.MinValue, -1034.23d, -12d, 0d, 147d, _ 199.55d, 9214.16d, Decimal.MaxValue }Dim result As SingleFor Each value As Decimal In values result = Convert.ToSingle(value) Console.WriteLine("Converted the {0} value '{1}' to the {2} value {3}.", _ value.GetType().Name, value, _ result.GetType().Name, result)Next' The example displays the following output:' Converted the Decimal value '-79228162514264337593543950335' to the Single value -7.922816E+28.' Converted the Decimal value '-1034.23' to the Single value -1034.23.' Converted the Decimal value '-12' to the Single value -12.' Converted the Decimal value '0' to the Single value 0.' Converted the Decimal value '147' to the Single value 147.' Converted the Decimal value '199.55' to the Single value 199.55.' Converted the Decimal value '9214.16' to the Single value 9214.16.' Converted the Decimal value '79228162514264337593543950335' to the Single value 7.922816E+28.

Weitere Informationen

• Round

Quelle:

Convert.cs

Quelle:

Convert.cs

Quelle:

Convert.cs

public: static float ToSingle(DateTime value);

public static float ToSingle (DateTime value);

static member ToSingle : DateTime -> single

Public Shared Function ToSingle (value As DateTime) As Single

Parameter

Gibt zurück

Diese Konvertierung wird nicht unterstützt. Es wird kein Wert zurückgegeben.

Ausnahmen

Quelle:

Convert.cs

Quelle:

Convert.cs

Quelle:

Convert.cs

public: static float ToSingle(char value);

public static float ToSingle (char value);

static member ToSingle : char -> single

Public Shared Function ToSingle (value As Char) As Single

Parameter

Gibt zurück

Diese Konvertierung wird nicht unterstützt. Es wird kein Wert zurückgegeben.

Ausnahmen

Weitere Informationen

• Char

Quelle:

Convert.cs

Quelle:

Convert.cs

Quelle:

Convert.cs

public: static float ToSingle(System::Byte value);

public static float ToSingle (byte value);

static member ToSingle : byte -> single

Public Shared Function ToSingle (value As Byte) As Single

Parameter

Gibt zurück

Eine Gleitkommazahl mit einfacher Genauigkeit, die value entspricht.

Beispiele

Im folgenden Beispiel wird jedes Element in einem Array von Bytewerten in einen Single Wert konvertiert.

byte[] numbers = { Byte.MinValue, 10, 100, Byte.MaxValue };float result;foreach (byte number in numbers){ result = Convert.ToSingle(number); Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.", number.GetType().Name, number, result.GetType().Name, result);}// The example displays the following output:// Converted the Byte value 0 to the Single value 0.// Converted the Byte value 10 to the Single value 10.// Converted the Byte value 100 to the Single value 100.// Converted the Byte value 255 to the Single value 255.

let numbers = [| Byte.MinValue; 10uy; 100uy; Byte.MaxValue |]for number in numbers do let result = Convert.ToSingle number printfn $"Converted the {number.GetType().Name} value {number} to the {result.GetType().Name} value {result}."// The example displays the following output:// Converted the Byte value 0 to the Single value 0.// Converted the Byte value 10 to the Single value 10.// Converted the Byte value 100 to the Single value 100.// Converted the Byte value 255 to the Single value 255.

Dim numbers() As Byte = { Byte.MinValue, 10, 100, Byte.MaxValue }Dim result As SingleFor Each number As Byte In numbers result = Convert.ToSingle(number) Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.", _ number.GetType().Name, number, _ result.GetType().Name, result)Next' The example displays the following output:' Converted the Byte value 0 to the Single value 0.' Converted the Byte value 10 to the Single value 10.' Converted the Byte value 100 to the Single value 100.' Converted the Byte value 255 to the Single value 255.

Quelle:

Convert.cs

Quelle:

Convert.cs

Quelle:

Convert.cs

public: static float ToSingle(bool value);

public static float ToSingle (bool value);

static member ToSingle : bool -> single

Public Shared Function ToSingle (value As Boolean) As Single

Parameter

Gibt zurück

Die Zahl1, wenn valuetrue ist, andernfalls 0(null).

Beispiele

Im folgenden Beispiel werden die booleschen Werte true und false in Single Werte konvertiert.

bool[] flags = { true, false };float result;foreach (bool flag in flags){ result = Convert.ToSingle(flag); Console.WriteLine("Converted {0} to {1}.", flag, result);}// The example displays the following output:// Converted True to 1.// Converted False to 0.

let flags = [| true; false |]for flag in flags do let result = Convert.ToSingle flag printfn $"Converted {flag} to {result}."// The example displays the following output:// Converted True to 1.// Converted False to 0.

Dim flags() As Boolean = { True, False }Dim result As SingleFor Each flag As Boolean In flags result = Convert.ToSingle(flag) Console.WriteLine("Converted {0} to {1}.", flag, result)Next' The example displays the following output:' Converted True to 1.' Converted False to 0.

Quelle:

Convert.cs

Quelle:

Convert.cs

Quelle:

Convert.cs

public: static float ToSingle(long value);

public static float ToSingle (long value);

static member ToSingle : int64 -> single

Public Shared Function ToSingle (value As Long) As Single

Parameter

Gibt zurück

Eine Gleitkommazahl mit einfacher Genauigkeit, die value entspricht.

Beispiele

Im folgenden Beispiel wird jedes Element in einem Array mit langen ganzen Zahlen in einen Single Wert konvertiert.

long[] numbers = { Int64.MinValue, -903, 0, 172, Int64.MaxValue};float result;foreach (long number in numbers){ result = Convert.ToSingle(number); Console.WriteLine("Converted the {0} value '{1}' to the {2} value {3}.", number.GetType().Name, number, result.GetType().Name, result);}// The example displays the following output:// Converted the Int64 value '-9223372036854775808' to the Single value -9.223372E+18.// Converted the Int64 value '-903' to the Single value -903.// Converted the Int64 value '0' to the Single value 0.// Converted the Int64 value '172' to the Single value 172.// Converted the Int64 value '9223372036854775807' to the Single value 9.223372E+18.

let numbers = [| Int64.MinValue; -903; 0; 172; Int64.MaxValue |]for number in numbers do let result = Convert.ToSingle number printfn $"Converted the {number.GetType().Name} value {number} to the {result.GetType().Name} value {result}."// The example displays the following output:// Converted the Int64 value '-9223372036854775808' to the Single value -9.223372E+18.// Converted the Int64 value '-903' to the Single value -903.// Converted the Int64 value '0' to the Single value 0.// Converted the Int64 value '172' to the Single value 172.// Converted the Int64 value '9223372036854775807' to the Single value 9.223372E+18.

 Dim numbers() As Long = { Int64.MinValue, -903, 0, 172, Int64.MaxValue} Dim result As Single For Each number As Long In numbers result = Convert.ToSingle(number) Console.WriteLine("Converted the {0} value '{1}' to the {2} value {3}.", _ number.GetType().Name, number, _ result.GetType().Name, result) Next ' The example displays the following output:Converted the Int64 value '-9223372036854775808' to the Single value -9.223372E+18.Converted the Int64 value '-903' to the Single value -903.Converted the Int64 value '0' to the Single value 0.Converted the Int64 value '172' to the Single value 172.Converted the Int64 value '9223372036854775807' to the Single value 9.223372E+18. ' Converted the Int64 value '-9223372036854775808' to the Single value -9.223372E+18. ' Converted the Int64 value '-903' to the Single value -903. ' Converted the Int64 value '0' to the Single value 0. ' Converted the Int64 value '172' to the Single value 172. ' Converted the Int64 value '9223372036854775807' to the Single value 9.223372E+18.