Guid.Equality(Guid, Guid) 运算符
定义
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
如果 a 和 b 相等,则为 true;否则为 false。true 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)