Tuple<T1,T2>.Equals(Object) 方法

定义

命名空间:

System

程序集:

System.Runtime.dll

程序集:

mscorlib.dll

程序集:

netstandard.dll

返回一个值，该值指示当前的 Tuple<T1,T2> 对象是否与指定对象相等。

public:
 override bool Equals(System::Object ^ obj);

public override bool Equals (object obj);

public override bool Equals (object? obj);

override this.Equals : obj -> bool

Public Overrides Function Equals (obj As Object) As Boolean

参数

obj

Object

与该实例进行比较的对象。

返回

Boolean

如果当前实例等于指定对象，则为 true；否则为 false。

示例

以下示例调用 Tuple<T1,T2>.Equals(Object) 该方法以确定对象数组 Tuple<T1,T2> 中的任何对象是否彼此相等。 输出反映了该方法在比较Tuple<T1,T2>组件具有相等值的对象时返回true的事实Equals(Object)。

using System;

public class Example
{
   public static void Main()
   {
      Tuple<string, Nullable<int>>[] scores = 
                      { new Tuple<string, Nullable<int>>("Dan", 90),
                        new Tuple<string, Nullable<int>>("Ernie", null),
                        new Tuple<string, Nullable<int>>("Jill", 88),
                        new Tuple<string, Nullable<int>>("Ernie", null), 
                        new Tuple<string, Nullable<int>>("Nancy", 88), 
                        new Tuple<string, Nullable<int>>("Dan", 90) };

      // Compare the Tuple objects
      for (int ctr = 0; ctr < scores.Length; ctr++)
      {
         for (int innerCtr = ctr + 1; innerCtr < scores.Length; innerCtr++)
         {
            Console.WriteLine("{0} = {1}: {2}", 
                              scores[ctr], scores[innerCtr], 
                              scores[ctr].Equals(scores[innerCtr]));
         }
         Console.WriteLine();
      }
   }
}
// The example displays the following output:
//       (Dan, 90) = (Ernie, ): False
//       (Dan, 90) = (Jill, 88): False
//       (Dan, 90) = (Ernie, ): False
//       (Dan, 90) = (Nancy, 88): False
//       (Dan, 90) = (Dan, 90): True
//       
//       (Ernie, ) = (Jill, 88): False
//       (Ernie, ) = (Ernie, ): True
//       (Ernie, ) = (Nancy, 88): False
//       (Ernie, ) = (Dan, 90): False
//       
//       (Jill, 88) = (Ernie, ): False
//       (Jill, 88) = (Nancy, 88): False
//       (Jill, 88) = (Dan, 90): False
//       
//       (Ernie, ) = (Nancy, 88): False
//       (Ernie, ) = (Dan, 90): False
//       
//       (Nancy, 88) = (Dan, 90): False

open System

let scores = 
    [| Tuple<string, Nullable<int>>("Dan", 90)
       Tuple<string, Nullable<int>>("Ernie", Nullable())
       Tuple<string, Nullable<int>>("Jill", 88)
       Tuple<string, Nullable<int>>("Ernie", Nullable()) 
       Tuple<string, Nullable<int>>("Nancy", 88)
       Tuple<string, Nullable<int>>("Dan", 90) |]

// Compare the Tuple objects
for ctr = 0 to scores.Length - 1 do
    for innerCtr = ctr + 1 to scores.Length - 1 do
        printfn $"{scores[ctr]} = {scores[innerCtr]}: {scores[ctr].Equals scores[innerCtr]}"
    printfn ""
// The example displays the following output:
//       (Dan, 90) = (Ernie, ): False
//       (Dan, 90) = (Jill, 88): False
//       (Dan, 90) = (Ernie, ): False
//       (Dan, 90) = (Nancy, 88): False
//       (Dan, 90) = (Dan, 90): True
//       
//       (Ernie, ) = (Jill, 88): False
//       (Ernie, ) = (Ernie, ): True
//       (Ernie, ) = (Nancy, 88): False
//       (Ernie, ) = (Dan, 90): False
//       
//       (Jill, 88) = (Ernie, ): False
//       (Jill, 88) = (Nancy, 88): False
//       (Jill, 88) = (Dan, 90): False
//       
//       (Ernie, ) = (Nancy, 88): False
//       (Ernie, ) = (Dan, 90): False
//       
//       (Nancy, 88) = (Dan, 90): False

Module Example
   Public Sub Main()
      Dim scores() As Tuple(Of String, Nullable(Of Integer)) = 
                      { New Tuple(Of String, Nullable(Of Integer))("Dan", 90),
                        New Tuple(Of String, Nullable(Of Integer))("Ernie", Nothing),
                        New Tuple(Of String, Nullable(Of Integer))("Jill", 88),
                        New Tuple(Of String, Nullable(Of Integer))("Ernie", Nothing), 
                        New Tuple(Of String, Nullable(Of Integer))("Nancy", 88), 
                        New Tuple(Of String, Nullable(Of Integer))("Dan", 90) }

      ' Compare the Tuple objects
      For ctr As Integer = 0 To scores.Length - 1
         For innerCtr As Integer = ctr + 1 To scores.Length - 1
            Console.WriteLine("{0} = {1}: {2}", 
                              scores(ctr), scores(innerCtr), 
                              scores(ctr).Equals(scores(innerCtr)))
         Next
         Console.WriteLine()
      Next
   End Sub
End Module
' The example displays the following output:
'       (Dan, 90) = (Ernie, ): False
'       (Dan, 90) = (Jill, 88): False
'       (Dan, 90) = (Ernie, ): False
'       (Dan, 90) = (Nancy, 88): False
'       (Dan, 90) = (Dan, 90): True
'       
'       (Ernie, ) = (Jill, 88): False
'       (Ernie, ) = (Ernie, ): True
'       (Ernie, ) = (Nancy, 88): False
'       (Ernie, ) = (Dan, 90): False
'       
'       (Jill, 88) = (Ernie, ): False
'       (Jill, 88) = (Nancy, 88): False
'       (Jill, 88) = (Dan, 90): False
'       
'       (Ernie, ) = (Nancy, 88): False
'       (Ernie, ) = (Dan, 90): False
'       
'       (Nancy, 88) = (Dan, 90): False

注解

该 obj 参数被视为在以下条件下等于当前实例：

• 它是一个 Tuple<T1,T2> 对象。

• 它的两个组件与当前实例的类型相同。

• 它的两个组件等于当前实例的组件。 相等性取决于每个组件的默认对象相等比较器。