Enum.GetNames(Type) 方法

定义

命名空间:
System
程序集:
mscorlib.dll, System.Runtime.dll
程序集:
mscorlib.dll
程序集:
System.Runtime.dll
程序集:
netstandard.dll

检索指定枚举中常量名称的数组。

public:
 static cli::array <System::String ^> ^ GetNames(Type ^ enumType);
public static string[] GetNames(Type enumType);
[System.Runtime.InteropServices.ComVisible(true)]
public static string[] GetNames(Type enumType);
static member GetNames : Type -> string[]
[<System.Runtime.InteropServices.ComVisible(true)>]
static member GetNames : Type -> string[]
Public Shared Function GetNames (enumType As Type) As String()

参数

enumType
Type

枚举类型。

返回

String[]

常量名称的 enumType字符串数组。

属性
ComVisibleAttribute

例外

ArgumentNullException

enumType 是 null。

ArgumentException

enumType 参数不是 Enum.

InvalidOperationException

.NET 8 及更高版本：enumType 是布尔支持的枚举类型。

示例

下面的示例演示了该方法的使用 GetNames 。

using System;

public class GetNamesTest {
    enum Colors { Red, Green, Blue, Yellow };
    enum Styles { Plaid, Striped, Tartan, Corduroy };

    public static void Main() {

        Console.WriteLine("The members of the Colors enum are:");
        foreach(string s in Enum.GetNames(typeof(Colors)))
            Console.WriteLine(s);

        Console.WriteLine();

        Console.WriteLine("The members of the Styles enum are:");
        foreach(string s in Enum.GetNames(typeof(Styles)))
            Console.WriteLine(s);
    }
}
// The example displays the following output:
//       The members of the Colors enum are:
//       Red
//       Green
//       Blue
//       Yellow
//
//       The members of the Styles enum are:
//       Plaid
//       Striped
//       Tartan
//       Corduroy

open System

type Colors =
    | Red = 0
    | Green = 1
    | Blue = 2
    | Yellow = 3

type Styles =
    | Plaid = 0
    | Striped = 1
    | Tartan = 2
    | Corduroy = 3

printfn "The members of the Colors enum are:"
for s in Enum.GetNames typeof<Colors> do
    printfn $"{s}"

printfn "\nThe members of the Styles enum are:"
for s in Enum.GetNames typeof<Styles> do
    printfn $"{s}"
// The example displays the following output:
//       The members of the Colors enum are:
//       Red
//       Green
//       Blue
//       Yellow
//
//       The members of the Styles enum are:
//       Plaid
//       Striped
//       Tartan
//       Corduroy

Public Class GetNamesTest
    Enum Colors
        Red
        Green
        Blue
        Yellow
    End Enum 
    
    Enum Styles
        Plaid
        Striped
        Tartan
        Corduroy
    End Enum
    
    Public Shared Sub Main()
        
        Console.WriteLine("The members of the Colors enum are:")
        For Each s In [Enum].GetNames(GetType(Colors))
            Console.WriteLine(s)
        Next

        Console.WriteLine()
        
        Console.WriteLine("The members of the Styles enum are:")
        For Each s In [Enum].GetNames(GetType(Styles))
            Console.WriteLine(s)
        Next
    End Sub
End Class
' The example displays the following output:
'       The members of the Colors enum are:
'       Red
'       Green
'       Blue
'       Yellow
'       
'       The members of the Styles enum are:
'       Plaid
'       Striped
'       Tartan
'       Corduroy

注解

返回值数组的元素按枚举常量（即其无符号数量级）的二进制值进行排序。 以下示例显示一个枚举方法返回 GetNames 的数组的相关信息，该枚举包括负值、零值和正值。

using System;

enum SignMagnitude { Negative = -1, Zero = 0, Positive = 1 };

public class Example
{
   public static void Main()
   {
      foreach (var name in Enum.GetNames(typeof(SignMagnitude))) {
         Console.WriteLine("{0,3:D}     0x{0:X}     {1}",
                           Enum.Parse(typeof(SignMagnitude), name),
                           name);
}   }
}
// The example displays the following output:
//         0     0x00000000     Zero
//         1     0x00000001     Positive
//        -1     0xFFFFFFFF     Negative

open System

type SignMagnitude =
   | Negative = -1
   | Zero = 0
   | Positive = 1

for name in Enum.GetNames typeof<SignMagnitude> do
    let p = Enum.Parse(typeof<SignMagnitude>, name)
    printfn $"{p,3:D}     0x{p:X}     {name}"

// The example displays the following output:
//         0     0x00000000     Zero
//         1     0x00000001     Positive
//        -1     0xFFFFFFFF     Negative

Public Enum SignMagnitude As Integer
   Negative = -1 
   Zero = 0
   Positive = 1
End Enum
   
Module Example
   Public Sub Main()
      Dim names() As String = [Enum].GetNames(GetType(SignMagnitude))
      For Each name In names
         Console.WriteLine("{0,3:D}     0x{0:X}     {1}", 
                           [Enum].Parse(GetType(SignMagnitude), name), 
                           name)
      Next
   End Sub
End Module
' The example displays the following output:
'      0     0x00000000     Zero
'      1     0x00000001     Positive
'     -1     0xFFFFFFFF     Negative

如果有具有相同值的枚举常量，则不指定其相应名称的顺序。

适用于