Guid.Equality(Guid, Guid) Operator

Definition

Namespace:

System

Assembly:

System.Runtime.dll

Quelle:

Guid.cs

Gibt an, ob die Werte von zwei angegebenen Guid-Objekten gleich sind.

public:
 static bool operator ==(Guid a, Guid b);

public static bool operator == (Guid a, Guid b);

static member ( = ) : Guid * Guid -> bool

Public Shared Operator == (a As Guid, b As Guid) As Boolean

Parameter

a

Guid

Das erste zu vergleichende Objekt.

b

Guid

Das zweite zu vergleichende Objekt.

Gibt zurück

Boolean

true, wenn a und b gleich sind, andernfalls false.

Beispiele

Im folgenden Beispiel wird der Equality Operator verwendet, um zwei GUID-Werte mit Guid.Empty zu vergleichen, um zu bestimmen, ob sie ausschließlich aus Nullen bestehen.

// Create a GUID and determine whether it consists of all zeros.
Guid guid1 = Guid.NewGuid();
Console.WriteLine(guid1);
Console.WriteLine($"Empty: {guid1 == Guid.Empty}\n");

// Create a GUID with all zeros and compare it to Empty.
var bytes = new Byte[16];
var guid2 = new Guid(bytes);
Console.WriteLine(guid2);
Console.WriteLine($"Empty: {guid2 == Guid.Empty}");

// The example displays output like the following:
//       11c43ee8-b9d3-4e51-b73f-bd9dda66e29c
//       Empty: False
//
//       00000000-0000-0000-0000-000000000000
//       Empty: True

open System

// Create a GUID and determine whether it consists of all zeros.
let guid1 = Guid.NewGuid()
printfn $"{guid1}"
printfn $"Empty: {guid1 = Guid.Empty}\n"

// Create a GUID with all zeros and compare it to Empty.
let bytes = Array.zeroCreate<byte> 16
let guid2 = Guid bytes
printfn $"{guid2}"
printfn $"Empty: {guid2 = Guid.Empty}"

// The example displays output like the following:
//       11c43ee8-b9d3-4e51-b73f-bd9dda66e29c
//       Empty: False
//
//       00000000-0000-0000-0000-000000000000
//       Empty: True

Module Example
   Public Sub Main()
      ' Create a GUID and determine whether it consists of all zeros.
      Dim guid1 As Guid = Guid.NewGuid
      Console.WriteLine(guid1)
      Console.WriteLine("Empty: {0}", guid1 = Guid.Empty)
      Console.WriteLine()
      
      ' Create a GUID with all zeros and compare it to Empty.
      Dim bytes(15) As Byte
      Dim guid2 As New Guid(bytes)
      Console.WriteLine(guid2)
      Console.WriteLine("Empty: {0}", guid2 = Guid.Empty)
   End Sub
End Module
' The example displays output like the following:
'       11c43ee8-b9d3-4e51-b73f-bd9dda66e29c
'       Empty: False
'       
'       00000000-0000-0000-0000-000000000000
'       Empty: True

Hinweise

Die entsprechende Methode für diesen Operator ist Guid.Equals(Object)