MemberInfo.DeclaringType 属性

定义

命名空间:

System.Reflection

程序集:

System.Runtime.dll

Source:

MemberInfo.Internal.cs

获取声明该成员的类。

public:
 abstract property Type ^ DeclaringType { Type ^ get(); };

public abstract Type? DeclaringType { get; }

member this.DeclaringType : Type

Public MustOverride ReadOnly Property DeclaringType As Type

属性值

Type

声明该成员的类的 Type 对象。

示例

以下示例定义具有单个成员 GetValue的接口 IValue。 它还定义了四个类：A（实现 接口的IValue基类）;B（继承自A基类实现并从基类实现C中隐藏其实现GetValue）;（仅继承自 A）;和 D（继承自 A 并重写其GetValue方法）。 然后 MemberInfo ，该示例检索类型 (的每个成员（包括从 Object) 继承的成员）的 对象，并显示其 DeclaringType 属性的值。

using System;
using System.Reflection;

interface IValue
{
   int GetValue() ;
};

class A : IValue
{
   public virtual int GetValue()
   {
      return 0;
   }
};

class B : A
{
   public new int GetValue()
   {
      return 0;
   }
};

class C : A
{ };

class D : A
{
   public override int GetValue()
   {
      return 0;
   }
}

public class Example
{
   public static void Main()
   {
      // Get members of IValue interface.
      ShowMembersAndDeclaringTypes(typeof(IValue));
      Console.WriteLine();
      ShowMembersAndDeclaringTypes(typeof(A));
      Console.WriteLine();
      ShowMembersAndDeclaringTypes(typeof(B));
      Console.WriteLine();
      ShowMembersAndDeclaringTypes(typeof(C));
      Console.WriteLine();
      ShowMembersAndDeclaringTypes(typeof(D));
      Console.WriteLine();
   }

   private static void ShowMembersAndDeclaringTypes(Type t)
   {
      MemberInfo[] members = t.GetMembers();
      Console.WriteLine("{0} Members: ", t.Name);
      foreach (var member in members)
         Console.WriteLine("   {0}, Declaring type: {1}",
                           member.Name, member.DeclaringType.Name);
   }
}
// The example displays the following output:
//       IValue Members:
//          GetValue, Declaring type: IValue
//
//       A Members:
//          GetValue, Declaring type: A
//          ToString, Declaring type: Object
//          Equals, Declaring type: Object
//          GetHashCode, Declaring type: Object
//          GetType, Declaring type: Object
//          .ctor, Declaring type: A
//
//       B Members:
//          GetValue, Declaring type: B
//          GetValue, Declaring type: A
//          ToString, Declaring type: Object
//          Equals, Declaring type: Object
//          GetHashCode, Declaring type: Object
//          GetType, Declaring type: Object
//          .ctor, Declaring type: B
//
//       C Members:
//          GetValue, Declaring type: A
//          ToString, Declaring type: Object
//          Equals, Declaring type: Object
//          GetHashCode, Declaring type: Object
//          GetType, Declaring type: Object
//          .ctor, Declaring type: C
//
//       D Members:
//          GetValue, Declaring type: D
//          ToString, Declaring type: Object
//          Equals, Declaring type: Object
//          GetHashCode, Declaring type: Object
//          GetType, Declaring type: Object
//          .ctor, Declaring type: D

Imports System.Reflection

Interface IValue 
   Function GetValue() As Integer 
End Interface
 
Class A : Implements IValue 
   Public Overridable Function GetValue() As Integer _
                               Implements IValue.GetValue 
      Return 0 
   End Function
End Class
 
Class B : Inherits A 
   Public Shadows Function GetValue() As Integer 
      Return 0 
   End Function
End Class
 
Class C : Inherits A 
End Class

Class D : Inherits A
   Public Overrides Function GetValue() As Integer
      Return 0
   End Function
End Class

Public Module Example
   Public Sub Main()
      ' Get members of IValue interface.
      ShowMembersAndDeclaringTypes(GetType(IValue))
      Console.WriteLine()
      ShowMembersAndDeclaringTypes(GetType(A))
      Console.WriteLine()
      ShowMembersAndDeclaringTypes(GetType(B))
      Console.WriteLine()
      ShowMembersAndDeclaringTypes(GetType(C))
      Console.WriteLine()
      ShowMembersAndDeclaringTypes(GetType(D))
      Console.WriteLine()
   End Sub

   Private Sub ShowMembersAndDeclaringTypes(t As Type)
      Dim members() As MemberInfo = t.GetMembers()
      Console.WriteLine("{0} Members: ", t.Name)
      For Each member In members
         Console.WriteLine("   {0}, Declaring type: {1}", 
                           member.Name, member.DeclaringType.Name)
      Next                      
   End Sub
End Module
' The example displays the following output:
'       IValue Members:
'          GetValue, Declaring type: IValue
'       
'       A Members:
'          GetValue, Declaring type: A
'          ToString, Declaring type: Object
'          Equals, Declaring type: Object
'          GetHashCode, Declaring type: Object
'          GetType, Declaring type: Object
'          .ctor, Declaring type: A
'       
'       B Members:
'          GetValue, Declaring type: B
'          GetValue, Declaring type: A
'          ToString, Declaring type: Object
'          Equals, Declaring type: Object
'          GetHashCode, Declaring type: Object
'          GetType, Declaring type: Object
'          .ctor, Declaring type: B
'       
'       C Members:
'          GetValue, Declaring type: A
'          ToString, Declaring type: Object
'          Equals, Declaring type: Object
'          GetHashCode, Declaring type: Object
'          GetType, Declaring type: Object
'          .ctor, Declaring type: C
'       
'       D Members:
'          GetValue, Declaring type: D
'          ToString, Declaring type: Object
'          Equals, Declaring type: Object
'          GetHashCode, Declaring type: Object
'          GetType, Declaring type: Object
'          .ctor, Declaring type: D

请注意， 的 A.GetValue 声明类型为 A，其中包括 B 两 GetValue 个方法，一个由 A 声明，一个由 B声明，并且 的 D.GetValue 声明类型为 D。

注意

DeclaringType 仅返回成员名称及其声明类型的名称。 若要返回成员名称及其原型，请调用 MemberInfo.ToString。

注解

属性 DeclaringType 检索对声明此成员的类型的 对象的引用 Type 。 类型的成员由类型声明或继承自基类型，因此Type属性返回DeclaringType的对象可能与用于获取当前MemberInfo对象的对象不同Type。

• 如果从中 Type 获取此 MemberInfo 对象的 对象未声明此成员，则 DeclaringType 属性将表示其基类型之一。

• MemberInfo如果对象是全局成员 (也就是说，如果它是从 Module.GetMethods 方法获取的，该方法返回模块) 上的全局方法，则返回DeclaringType的 将为 null。