Enum.GetNames Metode

Definisi

Ruang nama:

System

Rakitan:

System.Runtime.dll

Overload

GetNames(Type)	Mengambil array nama konstanta dalam enumerasi tertentu.
GetNames<TEnum>()	Mengambil array nama konstanta dalam jenis enumerasi tertentu.

GetNames(Type)

Sumber:

Enum.cs

Mengambil array nama konstanta dalam enumerasi tertentu.

public:
 static cli::array <System::String ^> ^ GetNames(Type ^ enumType);

public static string[] GetNames (Type enumType);

static member GetNames : Type -> string[]

Public Shared Function GetNames (enumType As Type) As String()

Parameter

enumType

Type

Jenis enumerasi.

Mengembalikan

String[]

Array string nama konstanta di enumType.

Pengecualian

ArgumentNullException

enumTypeadalah null.

ArgumentException

enumTypeparameter bukan .Enum

InvalidOperationException

.NET 8 dan versi yang lebih baru: enumType adalah jenis enumerasi yang didukung Boolean.

Contoh

Contoh berikut mengilustrasikan penggunaan GetNames metode .

using namespace System;
enum class Colors
{
   Red, Green, Blue, Yellow
};

enum class Styles
{
   Plaid, Striped, Tartan, Corduroy
};

int main()
{
   Console::WriteLine( "The members of the Colors enum are:" );
   Array^ a = Enum::GetNames( Colors::typeid );
   Int32 i = 0;
   do
   {
      Object^ o = a->GetValue( i );
      Console::WriteLine( o->ToString() );
   }
   while ( ++i < a->Length );

   Console::WriteLine();
   Console::WriteLine( "The members of the Styles enum are:" );
   Array^ b = Enum::GetNames( Styles::typeid );
   i = 0;
   do
   {
      Object^ o = b->GetValue( i );
      Console::WriteLine( o->ToString() );
   }
   while ( ++i < b->Length );
}
// 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

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

Keterangan

Elemen array nilai yang dikembalikan diurutkan berdasarkan nilai biner dari konstanta enumerasi (yaitu, berdasarkan besarannya yang tidak ditandatangani). Contoh berikut menyediakan menampilkan informasi tentang array yang dikembalikan oleh GetNames metode untuk enumerasi yang menyertakan nilai negatif, nol, dan positif.

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

Jika ada konstanta enumerasi dengan nilai yang sama, urutan nama yang sesuai tidak ditentukan.

GetNames<TEnum>()

Sumber:

Enum.cs

Mengambil array nama konstanta dalam jenis enumerasi tertentu.

public:
generic <typename TEnum>
 where TEnum : value class static cli::array <System::String ^> ^ GetNames();

public static string[] GetNames<TEnum> () where TEnum : struct;

static member GetNames : unit -> string[] (requires 'Enum : struct)

Public Shared Function GetNames(Of TEnum As Structure) () As String()

Jenis parameter

TEnum

Jenis enumerasi.

Mengembalikan

String[]

Array string nama konstanta di TEnum.

Pengecualian

InvalidOperationException

.NET 8 dan versi yang lebih baru: TEnum adalah jenis enumerasi yang didukung Boolean.