【摘MSDN】Enum.ToString 方法 (String)

本文转自：http://msdn.microsoft.com/zh-cn/vstudio/a0h36syw(VS.80).aspx

 

Enum.ToString 方法 (String)

使用指定格式将此实例的值转换成其等效的字符串表示。

命名空间:System
程序集:mscorlib（在 mscorlib.dll 中）

 语法

Visual Basic（声明）

Public Function ToString ( _ format As String _ ) As String

Visual Basic（用法）

Dim instance As Enum Dim format As String Dim returnValue As String returnValue = instance.ToString(format)

C#

public string ToString ( string format )

C++

public: String^ ToString ( String^ format )

J#

public String ToString ( String format )

JScript

public function ToString ( format : String ) : String

参数

format

格式字符串。

返回值

此实例的值的字符串表示形式，由 format 指定。

 异常

异常类型	条件
FormatException	format 包含无效规范。

 备注

format 参数中可包含格式字符“G”或“g”、“D”或“d”、“X”或“x”、“F”或“f”。如果 format 是 空引用（在 Visual Basic 中为 Nothing） 或空字符串 ("")，则使用一般格式说明符 ("G")。有关这些格式字符的更多信息，请参见 Format 方法的备注部分。有关一般格式化的更多信息，请参见 格式化概述。

 示例

Visual Basic 复制代码

' Sample for Enum.ToString(String) Imports System Class Sample Enum Colors Red Green Blue Yellow = 12 End Enum 'Colors Public Shared Sub Main() Dim myColor As Colors = Colors.Yellow Console.WriteLine("Colors.Red = {0}", Colors.Red.ToString("d")) Console.WriteLine("Colors.Green = {0}", Colors.Green.ToString("d")) Console.WriteLine("Colors.Blue = {0}", Colors.Blue.ToString("d")) Console.WriteLine("Colors.Yellow = {0}", Colors.Yellow.ToString("d")) Console.WriteLine("{0}myColor = Colors.Yellow{0}", Environment.NewLine) Console.WriteLine("myColor.ToString(""g"") = {0}", myColor.ToString("g")) Console.WriteLine("myColor.ToString(""G"") = {0}", myColor.ToString("G")) Console.WriteLine("myColor.ToString(""x"") = {0}", myColor.ToString("x")) Console.WriteLine("myColor.ToString(""X"") = {0}", myColor.ToString("X")) Console.WriteLine("myColor.ToString(""d"") = {0}", myColor.ToString("d")) Console.WriteLine("myColor.ToString(""D"") = {0}", myColor.ToString("D")) Console.WriteLine("myColor.ToString(""f"") = {0}", myColor.ToString("f")) Console.WriteLine("myColor.ToString(""F"") = {0}", myColor.ToString("F")) End Sub 'Main End Class 'Sample ' 'This example produces the following results: ' 'Colors.Red = 0 'Colors.Green = 1 'Colors.Blue = 2 'Colors.Yellow = 12 ' 'myColor = Colors.Yellow ' 'myColor.ToString("g") = Yellow 'myColor.ToString("G") = Yellow 'myColor.ToString("x") = 0000000C 'myColor.ToString("X") = 0000000C 'myColor.ToString("d") = 12 'myColor.ToString("D") = 12 'myColor.ToString("f") = Yellow 'myColor.ToString("F") = Yellow '

C# 复制代码

// Sample for Enum.ToString(String) using System; class Sample { enum Colors {Red, Green, Blue, Yellow = 12}; public static void Main() { Colors myColor = Colors.Yellow; Console.WriteLine("Colors.Red = {0}", Colors.Red.ToString("d")); Console.WriteLine("Colors.Green = {0}", Colors.Green.ToString("d")); Console.WriteLine("Colors.Blue = {0}", Colors.Blue.ToString("d")); Console.WriteLine("Colors.Yellow = {0}", Colors.Yellow.ToString("d")); Console.WriteLine("{0}myColor = Colors.Yellow{0}", Environment.NewLine); Console.WriteLine("myColor.ToString(\"g\") = {0}", myColor.ToString("g")); Console.WriteLine("myColor.ToString(\"G\") = {0}", myColor.ToString("G")); Console.WriteLine("myColor.ToString(\"x\") = {0}", myColor.ToString("x")); Console.WriteLine("myColor.ToString(\"X\") = {0}", myColor.ToString("X")); Console.WriteLine("myColor.ToString(\"d\") = {0}", myColor.ToString("d")); Console.WriteLine("myColor.ToString(\"D\") = {0}", myColor.ToString("D")); Console.WriteLine("myColor.ToString(\"f\") = {0}", myColor.ToString("f")); Console.WriteLine("myColor.ToString(\"F\") = {0}", myColor.ToString("F")); } } /* This example produces the following results: Colors.Red = 0 Colors.Green = 1 Colors.Blue = 2 Colors.Yellow = 12 myColor = Colors.Yellow myColor.ToString("g") = Yellow myColor.ToString("G") = Yellow myColor.ToString("x") = 0000000C myColor.ToString("X") = 0000000C myColor.ToString("d") = 12 myColor.ToString("D") = 12 myColor.ToString("f") = Yellow myColor.ToString("F") = Yellow */

C++ 复制代码

// Sample for Enum::ToString(String) using namespace System; enum class Colors { Red, Green, Blue, Yellow = 12 }; int main() { Colors myColor = Colors::Yellow; Console::WriteLine( "Colors::Red = {0}", Colors::Red.ToString( "d" ) ); Console::WriteLine( "Colors::Green = {0}", Colors::Green.ToString( "d" ) ); Console::WriteLine( "Colors::Blue = {0}", Colors::Blue.ToString( "d" ) ); Console::WriteLine( "Colors::Yellow = {0}", Colors::Yellow.ToString( "d" ) ); Console::WriteLine( " {0}myColor = Colors::Yellow {0}", Environment::NewLine ); Console::WriteLine( "myColor->ToString(\"g\") = {0}", myColor.ToString( "g" ) ); Console::WriteLine( "myColor->ToString(\"G\") = {0}", myColor.ToString( "G" ) ); Console::WriteLine( "myColor->ToString(\"x\") = {0}", myColor.ToString( "x" ) ); Console::WriteLine( "myColor->ToString(\"X\") = {0}", myColor.ToString( "X" ) ); Console::WriteLine( "myColor->ToString(\"d\") = {0}", myColor.ToString( "d" ) ); Console::WriteLine( "myColor->ToString(\"D\") = {0}", myColor.ToString( "D" ) ); Console::WriteLine( "myColor->ToString(\"f\") = {0}", myColor.ToString( "f" ) ); Console::WriteLine( "myColor->ToString(\"F\") = {0}", myColor.ToString( "F" ) ); } /* This example produces the following results: Colors::Red = 0 Colors::Green = 1 Colors::Blue = 2 Colors::Yellow = 12 myColor = Colors::Yellow myColor->ToString("g") = Yellow myColor->ToString("G") = Yellow myColor->ToString("x") = 0000000C myColor->ToString("X") = 0000000C myColor->ToString("d") = 12 myColor->ToString("D") = 12 myColor->ToString("f") = Yellow myColor->ToString("F") = Yellow */

J# 复制代码

// Sample for Enum.ToString(String) import System.*; class Sample { enum Colors { red (0), green (1), blue (2), yellow (12); } //Colors public static void main(String[] args) { Colors myColor = Colors.yellow; Console.WriteLine("Colors.Red = {0}", Colors.red.ToString("d")); Console.WriteLine("Colors.Green = {0}", Colors.green.ToString("d")); Console.WriteLine("Colors.Blue = {0}", Colors.blue.ToString("d")); Console.WriteLine("Colors.Yellow = {0}", Colors.yellow.ToString("d")); Console.WriteLine("{0}myColor = Colors.Yellow{0}", Environment.get_NewLine()); Console.WriteLine("myColor.ToString(\"g\") = {0}", myColor.ToString("g")); Console.WriteLine("myColor.ToString(\"G\") = {0}", myColor.ToString("G")); Console.WriteLine("myColor.ToString(\"x\") = {0}", myColor.ToString("x")); Console.WriteLine("myColor.ToString(\"X\") = {0}", myColor.ToString("X")); Console.WriteLine("myColor.ToString(\"d\") = {0}", myColor.ToString("d")); Console.WriteLine("myColor.ToString(\"D\") = {0}", myColor.ToString("D")); Console.WriteLine("myColor.ToString(\"f\") = {0}", myColor.ToString("f")); Console.WriteLine("myColor.ToString(\"F\") = {0}", myColor.ToString("F")); } //main } //Sample /* This example produces the following results: Colors.Red = 0 Colors.Green = 1 Colors.Blue = 2 Colors.Yellow = 12 myColor = Colors.Yellow myColor.ToString("g") = Yellow myColor.ToString("G") = Yellow myColor.ToString("x") = 0000000C myColor.ToString("X") = 0000000C myColor.ToString("d") = 12 myColor.ToString("D") = 12 myColor.ToString("f") = Yellow myColor.ToString("F") = Yellow */

 平台

Windows 98、Windows 2000 SP4、Windows CE、Windows Millennium Edition、Windows Mobile for Pocket PC、Windows Mobile for Smartphone、Windows Server 2003、Windows XP Media Center Edition、Windows XP Professional x64 Edition、Windows XP SP2、Windows XP Starter Edition

.NET Framework 并不是对每个平台的所有版本都提供支持。有关受支持版本的列表，请参见系统要求。

 版本信息

.NET Framework

受以下版本支持：2.0、1.1、1.0

.NET Compact Framework

受以下版本支持：2.0

 请参见

参考

Enum 结构
Enum 成员
System 命名空间
Format
Parse

其他资源

格式化概述
枚举格式字符串