指定した値を単精度浮動小数点数に変換します。
オーバーロードの一覧
指定したブール値を等価の単精度浮動小数点数に変換します。
.NET Compact Framework でもサポート。
[Visual Basic] Overloads Public Shared Function ToSingle(Boolean) As Single
指定した 8 ビット符号なし整数値を等価の単精度浮動小数点数に変換します。
.NET Compact Framework でもサポート。
[Visual Basic] Overloads Public Shared Function ToSingle(Byte) As Single
このメソッドを呼び出すと、必ず InvalidCastException がスローされます。
.NET Compact Framework でもサポート。
[Visual Basic] Overloads Public Shared Function ToSingle(Char) As Single
このメソッドを呼び出すと、必ず InvalidCastException がスローされます。
[Visual Basic] Overloads Public Shared Function ToSingle(DateTime) As Single
[JScript] public static function ToSingle(DateTime) : float;
指定した Decimal の数値を等価の単精度浮動小数点数に変換します。
.NET Compact Framework でもサポート。
[Visual Basic] Overloads Public Shared Function ToSingle(Decimal) As Single
指定した倍精度浮動小数点数値を等価の単精度浮動小数点数に変換します。
.NET Compact Framework でもサポート。
[Visual Basic] Overloads Public Shared Function ToSingle(Double) As Single
指定した 16 ビット符号付き整数の値を等価の単精度浮動小数点数に変換します。
.NET Compact Framework でもサポート。
[Visual Basic] Overloads Public Shared Function ToSingle(Short) As Single
指定した 32 ビット符号付き整数の値を等価の単精度浮動小数点数に変換します。
.NET Compact Framework でもサポート。
[Visual Basic] Overloads Public Shared Function ToSingle(Integer) As Single
指定した 64 ビット符号付き整数の値を等価の単精度浮動小数点数に変換します。
.NET Compact Framework でもサポート。
[Visual Basic] Overloads Public Shared Function ToSingle(Long) As Single
指定した Object の値を単精度浮動小数点数に変換します。
.NET Compact Framework でもサポート。
[Visual Basic] Overloads Public Shared Function ToSingle(Object) As Single
指定した 8 ビット符号付き整数値を等価の単精度浮動小数点数に変換します。このメソッドは、CLS と互換性がありません。
.NET Compact Framework でもサポート。
[Visual Basic] Overloads Public Shared Function ToSingle(SByte) As Single
指定した単精度浮動小数点数を返します。実際の変換処理は実行されません。
.NET Compact Framework でもサポート。
[Visual Basic] Overloads Public Shared Function ToSingle(Single) As Single
指定した String 形式の数値を、それと等価な単精度浮動小数点数に変換します。
.NET Compact Framework でもサポート。
[Visual Basic] Overloads Public Shared Function ToSingle(String) As Single
指定した 16 ビット符号なし整数値を等価の単精度浮動小数点数に変換します。このメソッドは、CLS と互換性がありません。
.NET Compact Framework でもサポート。
[Visual Basic] Overloads Public Shared Function ToSingle(UInt16) As Single
指定した 32 ビット符号なし整数値を等価の単精度浮動小数点数に変換します。このメソッドは、CLS と互換性がありません。
.NET Compact Framework でもサポート。
[Visual Basic] Overloads Public Shared Function ToSingle(UInt32) As Single
指定した 64 ビット符号なし整数値を等価の単精度浮動小数点数に変換します。このメソッドは、CLS と互換性がありません。
.NET Compact Framework でもサポート。
[Visual Basic] Overloads Public Shared Function ToSingle(UInt64) As Single
指定したカルチャに固有の書式情報を使用して、指定した Object の値を等価の単精度浮動小数点数に変換します。
[Visual Basic] Overloads Public Shared Function ToSingle(Object, IFormatProvider) As Single
[C++] public: static float ToSingle(Object*, IFormatProvider*);
[JScript] public static function ToSingle(Object, IFormatProvider) : float;
指定したカルチャに固有の書式情報を使用して、指定した String 形式の数値を等価の単精度浮動小数点数に変換します。
.NET Compact Framework でもサポート。
[Visual Basic] Overloads Public Shared Function ToSingle(String, IFormatProvider) As Single
[C++] public: static float ToSingle(String*, IFormatProvider*);
[JScript] public static function ToSingle(String, IFormatProvider) : float;
使用例
[Visual Basic, C#, C++] IFormatProvider オブジェクトを使用し、 String 形式の Single の値を ToSingle メソッドで変換するコード例を次に示します。
[Visual Basic, C#, C++] メモ ここでは、ToSingle のオーバーロード形式のうちの 1 つだけについて、使用例を示します。その他の例については、各オーバーロード形式のトピックを参照してください。
' Example of the Convert.ToSingle( String ) and
' Convert.ToSingle( String, IFormatProvider ) methods.
Imports System
Imports System.Globalization
Imports Microsoft.VisualBasic
Module ToSingleProviderDemo
Dim formatter As String = "{0,-22}{1,-20}{2}"
' Get the exception type name; remove the namespace prefix.
Function GetExceptionType( ex As Exception ) As String
Dim exceptionType As String = ex.GetType( ).ToString( )
GetExceptionType = exceptionType.Substring( _
exceptionType.LastIndexOf( "."c ) + 1 )
End Function
Sub ConvertToSingle( numericStr As String, _
provider As IFormatProvider )
Dim defaultValue As Object
Dim providerValue As Object
' Convert numericStr to Single without a format provider.
Try
defaultValue = Convert.ToSingle( numericStr )
Catch ex As Exception
defaultValue = GetExceptionType( ex )
End Try
' Convert numericStr to Single with a format provider.
Try
providerValue = Convert.ToSingle( numericStr, provider )
Catch ex As Exception
providerValue = GetExceptionType( ex )
End Try
Console.WriteLine( formatter, numericStr, _
defaultValue, providerValue )
End Sub
Sub Main( )
' Create a NumberFormatInfo object and set several of its
' properties that apply to numbers.
Dim provider As NumberFormatInfo = new NumberFormatInfo( )
provider.NumberDecimalSeparator = ","
provider.NumberGroupSeparator = "."
provider.NumberGroupSizes = New Integer( ) { 3 }
Console.WriteLine( "This example of" & vbCrLf & _
" Convert.ToSingle( String ) and " & vbCrLf & _
" Convert.ToSingle( String, IFormatProvider ) " & _
vbCrLf & "generates the " & _
"following output when run in the [{0}] culture.", _
CultureInfo.CurrentCulture.Name )
Console.WriteLine( vbCrLf & _
"Several strings are converted to Single values, " & _
"using " & vbCrLf & "default formatting " & _
"and a NumberFormatInfo object." & vbCrLf )
Console.WriteLine( formatter, "String to convert", _
"Default/exception", "Provider/exception" )
Console.WriteLine( formatter, "-----------------", _
"-----------------", "------------------" )
' Convert strings, with and without an IFormatProvider.
ConvertToSingle( "1234567", provider )
ConvertToSingle( "1234.567", provider )
ConvertToSingle( "1234,567", provider )
ConvertToSingle( "12,345.67", provider )
ConvertToSingle( "12.345,67", provider )
ConvertToSingle( "1,234,567.89", provider )
ConvertToSingle( "1.234.567,89", provider )
End Sub
End Module
' This example of
' Convert.ToSingle( String ) and
' Convert.ToSingle( String, IFormatProvider )
' generates the following output when run in the [en-US] culture.
'
' Several strings are converted to Single values, using
' default formatting and a NumberFormatInfo object.
'
' String to convert Default/exception Provider/exception
' ----------------- ----------------- ------------------
' 1234567 1234567 1234567
' 1234.567 1234.567 1234567
' 1234,567 1234567 1234.567
' 12,345.67 12345.67 FormatException
' 12.345,67 FormatException 12345.67
' 1,234,567.89 1234568 FormatException
' 1.234.567,89 FormatException 1234568
[C#]
// Example of the Convert.ToSingle( String ) and
// Convert.ToSingle( String, IFormatProvider ) methods.
using System;
using System.Globalization;
class ToSingleProviderDemo
{
static string formatter = "{0,-22}{1,-20}{2}";
// Get the exception type name; remove the namespace prefix.
static string GetExceptionType( Exception ex )
{
string exceptionType = ex.GetType( ).ToString( );
return exceptionType.Substring(
exceptionType.LastIndexOf( '.' ) + 1 );
}
static void ConvertToSingle( string numericStr,
IFormatProvider provider )
{
object defaultValue;
object providerValue;
// Convert numericStr to float without a format provider.
try
{
defaultValue = Convert.ToSingle( numericStr );
}
catch( Exception ex )
{
defaultValue = GetExceptionType( ex );
}
// Convert numericStr to float with a format provider.
try
{
providerValue = Convert.ToSingle( numericStr, provider );
}
catch( Exception ex )
{
providerValue = GetExceptionType( ex );
}
Console.WriteLine( formatter, numericStr, defaultValue,
providerValue );
}
static void Main( )
{
// Create a NumberFormatInfo object and set several of its
// properties that apply to numbers.
NumberFormatInfo provider = new NumberFormatInfo( );
provider.NumberDecimalSeparator = ",";
provider.NumberGroupSeparator = ".";
provider.NumberGroupSizes = new int[ ] { 3 };
Console.WriteLine(
"This example of\n Convert.ToSingle( String ) and \n" +
" Convert.ToSingle( String, IFormatProvider ) \n" +
"generates the following output when run in the " +
"[{0}] culture.",
CultureInfo.CurrentCulture.Name );
Console.WriteLine( "\nSeveral " +
"strings are converted to float values, using \n" +
"default formatting and a NumberFormatInfo object.\n");
Console.WriteLine( formatter, "String to convert",
"Default/exception", "Provider/exception" );
Console.WriteLine( formatter, "-----------------",
"-----------------", "------------------" );
// Convert strings, with and without an IFormatProvider.
ConvertToSingle( "1234567", provider );
ConvertToSingle( "1234.567", provider );
ConvertToSingle( "1234,567", provider );
ConvertToSingle( "12,345.67", provider );
ConvertToSingle( "12.345,67", provider );
ConvertToSingle( "1,234,567.89", provider );
ConvertToSingle( "1.234.567,89", provider );
}
}
/*
This example of
Convert.ToSingle( String ) and
Convert.ToSingle( String, IFormatProvider )
generates the following output when run in the [en-US] culture.
Several strings are converted to float values, using
default formatting and a NumberFormatInfo object.
String to convert Default/exception Provider/exception
----------------- ----------------- ------------------
1234567 1234567 1234567
1234.567 1234.567 1234567
1234,567 1234567 1234.567
12,345.67 12345.67 FormatException
12.345,67 FormatException 12345.67
1,234,567.89 1234568 FormatException
1.234.567,89 FormatException 1234568
*/
[C++]
// Example of the Convert::ToSingle( String ) and
// Convert::ToSingle( String, IFormatProvider ) methods.
#using <mscorlib.dll>
using namespace System;
using namespace System::Globalization;
const __wchar_t* formatter = L"{0,-22}{1,-20}{2}";
// Get the exception type name; remove the namespace prefix.
String* GetExceptionType( Exception* ex )
{
String* exceptionType = ex->GetType( )->ToString( );
return exceptionType->Substring(
exceptionType->LastIndexOf( '.' ) + 1 );
}
void ConvertToSingle( String* numericStr,
IFormatProvider* provider )
{
Object* defaultValue;
Object* providerValue;
// Convert numericStr to float without a format provider.
try
{
defaultValue = __box( Convert::ToSingle( numericStr ) );
}
catch( Exception* ex )
{
defaultValue = GetExceptionType( ex );
}
// Convert numericStr to float with a format provider.
try
{
providerValue = __box(
Convert::ToSingle( numericStr, provider ) );
}
catch( Exception* ex )
{
providerValue = GetExceptionType( ex );
}
Console::WriteLine( new String( formatter ), numericStr,
defaultValue, providerValue );
}
void main( )
{
// Create a NumberFormatInfo object and set several of its
// properties that apply to numbers.
NumberFormatInfo* provider = new NumberFormatInfo( );
provider->NumberDecimalSeparator = S",";
provider->NumberGroupSeparator = S".";
Int32 sizes __gc [] = { 3 };
provider->NumberGroupSizes = sizes;
Console::WriteLine(
S"This example of\n Convert::ToSingle( String* ) and \n"
S" Convert::ToSingle( String*, IFormatProvider* ) \n"
S"generates the following output when run in the "
S"[{0}] culture.",
CultureInfo::CurrentCulture->Name );
Console::WriteLine( S"\nSeveral "
S"strings are converted to float values, using \n"
S"default formatting and a NumberFormatInfo object.\n");
Console::WriteLine( new String( formatter ), S"String to convert",
S"Default/exception", S"Provider/exception" );
Console::WriteLine( new String( formatter ), S"-----------------",
S"-----------------", S"------------------" );
// Convert strings, with and without an IFormatProvider.
ConvertToSingle( S"1234567", provider );
ConvertToSingle( S"1234.567", provider );
ConvertToSingle( S"1234,567", provider );
ConvertToSingle( S"12,345.67", provider );
ConvertToSingle( S"12.345,67", provider );
ConvertToSingle( S"1,234,567.89", provider );
ConvertToSingle( S"1.234.567,89", provider );
}
/*
This example of
Convert::ToSingle( String* ) and
Convert::ToSingle( String*, IFormatProvider* )
generates the following output when run in the [en-US] culture.
Several strings are converted to float values, using
default formatting and a NumberFormatInfo object.
String to convert Default/exception Provider/exception
----------------- ----------------- ------------------
1234567 1234567 1234567
1234.567 1234.567 1234567
1234,567 1234567 1234.567
12,345.67 12345.67 FormatException
12.345,67 FormatException 12345.67
1,234,567.89 1234568 FormatException
1.234.567,89 FormatException 1234568
*/
[JScript] JScript のサンプルはありません。Visual Basic、C#、および C++ のサンプルを表示するには、このページの左上隅にある言語のフィルタ ボタン .gif)
をクリックします。