Guid.Equality(Guid, Guid) 运算符

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

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

b
Guid

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

返回

Boolean

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 运算符将两个 GUID 值与进行比较, 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.

// 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
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是 Guid.Equals(Object)The equivalent method for this operator is Guid.Equals(Object)

适用于