Tuple<T1>.Equals(Object) Tuple<T1>.Equals(Object) Tuple<T1>.Equals(Object) Tuple<T1>.Equals(Object) Method

定义

返回一个值,该值指示当前的 Tuple<T1> 对象是否与指定对象相等。Returns a value that indicates whether the current Tuple<T1> object is equal to a specified object.

public:
 override bool Equals(System::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 Object Object Object

与该实例进行比较的对象。The object to compare with this instance.

返回

如果当前实例等于指定对象,则为 true;否则为 falsetrue if the current instance is equal to the specified object; otherwise, false.

示例

下面Tuple<T1>.Equals(Object)的示例调用方法来Tuple<T1>比较Double对象, 其组件为具有三个Tuple<T1>对象 (其组件具有以下特征) 的值:The following example calls the Tuple<T1>.Equals(Object) method to compare a Tuple<T1> object whose component is a Double value with three Tuple<T1> objects whose components have the following characteristics:

  • 相同类型 (Double) 和相同的值。Same type (Double) and same value.

  • 相同类型 (Double), 但值不同。Same type (Double), but different value.

  • 不同类型 (Single), 但值相同。Different type (Single), but same value.

using System;

public class Example
{
   public static void Main()
   {
      var doubleTuple1 = Tuple.Create(12.3455);
      var doubleTuple2 = Tuple.Create(16.8912);
      var doubleTuple3 = Tuple.Create(12.3455);
      var singleTuple1 = Tuple.Create(12.3455f);
      var tuple2 = Tuple.Create("James", 97.3); 
        
      // Compare first tuple with a Tuple(Of Double) with a different value.
      TestEquality(doubleTuple1, doubleTuple2);
      // Compare first tuple with a Tuple(Of Double) with the same value.
      TestEquality(doubleTuple1, doubleTuple3);
      // Compare first tuple with a Tuple(Of Single) with the same value.
      TestEquality(doubleTuple1, singleTuple1);
      // Compare a 1-tuple with a 2-tuple.
      TestEquality(doubleTuple1, tuple2); 
   }

   private static void TestEquality(Tuple<double> tuple, object obj)
   {
      Console.WriteLine("{0} = {1}: {2}", tuple.ToString(),
                                          obj.ToString(),
                                          tuple.Equals(obj));
   } 
}
// The example displays the following output:
//       (12.3455) = (16.8912): False
//       (12.3455) = (12.3455): True
//       (12.3455) = (12.3455): False
//       (12.3455) = (James, 97.3): False
Module Example
    Sub Main()
        Dim doubleTuple1 = Tuple.Create(12.3455)

        Dim doubleTuple2 = Tuple.Create(16.8912)
        Dim doubleTuple3 = Tuple.Create(12.3455)
        Dim singleTuple1 = Tuple.Create(CSng(12.3455))
        Dim tuple2 = Tuple.Create("James", 97.3) 
        ' Compare first tuple with a Tuple(Of Double) with a different value.
        TestEquality(doubleTuple1, doubleTuple2)
        ' Compare first tuple with a Tuple(Of Double) with the same value.
        TestEquality(doubleTuple1, doubleTuple3)
        ' Compare first tuple with a Tuple(Of Single) with the same value.
        TestEquality(doubleTuple1, singleTuple1)
        ' Compare a 1-tuple with a 2-tuple.
        TestEquality(doubleTuple1, tuple2) 
    End Sub
    
   Private Sub TestEquality(tuple As Tuple(Of Double), obj As Object)
      Try
         Console.WriteLine("{0} = {1}: {2}", tuple.ToString(),
                                            obj.ToString,
                                            tuple.Equals(obj))
      
      Catch e As ArgumentException
         If obj.GetType.IsGenericType Then 
            If obj.GetType().Name = "Tuple`1" Then 
               Console.WriteLine("Cannot compare a Tuple(Of {0}) with a Tuple(Of {1}).", 
                              tuple.Item1.GetType().Name, obj.Item1.GetType().Name)
            Else
               Console.WriteLine("Cannot compare a {0} with a {1}.", tuple.GetType().Name, 
                                                                     obj.GetType().Name)
            End If
         Else
            Console.WriteLine("Cannot compare a {0} with a {1}.", tuple.GetType().Name,
                                                                  obj.GetType().Name)
         End If
      End Try
   End Sub
End Module
' The example displays the following output:
'       (12.3455) = (16.8912): False
'       (12.3455) = (12.3455): True
'       (12.3455) = (12.3455): False
'       (12.3455) = (James, 97.3): False

注解

obj下列条件下, 参数被视为等于当前实例:The obj parameter is considered to be equal to the current instance under the following conditions:

  • 它是一个Tuple<T1>对象。It is a Tuple<T1> object.

  • 其单个组件的类型与当前实例相同。Its single component is of the same type as the current instance.

  • 它的单个组件等于当前实例的组件。Its single component is equal to that of the current instance. 相等性取决于每个组件的默认对象相等比较器。Equality is determined by the default object equality comparer for each component.

适用于