Home Original page

Enum.ToString Method (System)

Source:
Enum.cs
Source:
Enum.cs
Source:
Enum.cs
Source:
Enum.cs
Source:
Enum.cs

Converts the value of this instance to its equivalent string representation using the specified format.

public:
 System::String ^ ToString(System::String ^ format);
public string ToString(string format);
public string ToString(string? format);
override this.ToString : string -> string
Public Function ToString (format As String) As String

Parameters

format
String

A format string.

Returns

The string representation of the value of this instance as specified by format.

Exceptions

format contains an invalid specification.

format equals "X", but the enumeration type is unknown.

Examples

The following example demonstrates how to convert an enumerated value to a string.

// 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
*/

// Sample for Enum.ToString(String)
open System

type Colors =
    | Red = 0 
    | Green = 1 
    | Blue = 2 
    | Yellow = 12

let myColor = Colors.Yellow

printfn $"""Colors.Red = {Colors.Red.ToString "d"}"""
printfn $"""Colors.Green = {Colors.Green.ToString "d"}"""
printfn $"""Colors.Blue = {Colors.Blue.ToString "d"}"""
printfn $"""Colors.Yellow = {Colors.Yellow.ToString "d"}"""

printfn "\nmyColor = Colors.Yellow\n"

printfn $"""myColor.ToString("g") = {myColor.ToString "g"}"""
printfn $"""myColor.ToString("G") = {myColor.ToString "G"}"""

printfn $"""myColor.ToString("x") = {myColor.ToString "x"}"""
printfn $"""myColor.ToString("X") = {myColor.ToString "X"}"""

printfn $"""myColor.ToString("d") = {myColor.ToString "d"}"""
printfn $"""myColor.ToString("D") = {myColor.ToString "d"}"""

printfn $"""myColor.ToString("f") = {myColor.ToString "f"}"""
printfn $"""myColor.ToString("F") = {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

' Sample for Enum.ToString(String)
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
End Class
'
'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
'

Remarks

The format parameter can be one of the following format strings: "G" or "g", "D" or "d", "X" or "x", and "F" or "f" (the format string is not case-sensitive). If format is null or an empty string (""), the general format specifier ("G") is used. For more information about the enumeration format strings and formatting enumeration values, see Enumeration Format Strings. For more information about formatting in general, see Formatting Types.

Notes to Callers

If multiple enumeration members have the same underlying value and you attempt to retrieve the string representation of an enumeration member's name based on its underlying value, your code should not make any assumptions about which name the method will return. For example, the following enumeration defines two members, Shade.Gray and Shade.Grey, that have the same underlying value.

enum Shade
{
    White = 0, Gray = 1, Grey = 1, Black = 2
}

type Shade =
    | White = 0
    | Gray = 1
    | Grey = 1
    | Black = 2

Public Enum Shade
   White = 0
   Gray = 1
   Grey = 1
   Black = 2
End Enum

The following method call attempts to retrieve the name of a member of the Shade enumeration whose underlying value is 1. The method can return either "Gray" or "Grey", and your code should not make any assumptions about which string will be returned.

string shadeName = ((Shade) 1).ToString("F");

let shadeName = (enum<Shade> 1).ToString "F"

Dim shadeName As String = CType(1, Shade).ToString("F")

See also

Applies to