Guid.Equality(Guid, Guid) Guid.Equality(Guid, Guid) Guid.Equality(Guid, Guid) Guid.Equality(Guid, Guid) Operator

定义

指示两个指定的 Guid 对象的值是否相等。Indicates whether the values of two specified Guid objects are equal.

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

参数

a
Guid Guid Guid Guid

要比较的第一个对象。The first object to compare.

b
Guid Guid Guid Guid

要比较的第二个对象。The second object to compare.

返回

如果 ab 相等,则为 true;否则为 falsetrue if a and b are equal; otherwise, false.

示例

下面的示例使用 Equality 运算符比较两个 GUID 值与 Guid.Empty,以确定它们是否仅包含零。The following example uses the Equality operator to compare two GUID values with Guid.Empty to determine whether they consist exclusively of zeros.

using System;

public class Example
{
   public static void Main()
   {
      // Create a GUID and determine whether it consists of all zeros.
      Guid guid1 = Guid.NewGuid();
      Console.WriteLine(guid1);
      Console.WriteLine("Empty: {0}\n", guid1 == Guid.Empty);
      
      // Create a GUID with all zeros and compare it to Empty.
      Byte[] bytes = new Byte[16];
      Guid guid2 = new Guid(bytes);
      Console.WriteLine(guid2);
      Console.WriteLine("Empty: {0}", 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

注解

此运算符的等效方法为 Guid.Equals(Object)The equivalent method for this operator is Guid.Equals(Object)

适用于