MemberInfo.DeclaringType 屬性

定義

命名空間:

System.Reflection

組件:

System.Runtime.dll

來源:

MemberInfo.Internal.cs

取得宣告這個成員的類別。

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

public abstract Type? DeclaringType { get; }

member this.DeclaringType : Type

Public MustOverride ReadOnly Property DeclaringType As Type

屬性值

Type

宣告這個成員之類別的 Type 物件。

範例

下列範例會定義具有單一成員 GetValue 的介面 IValue 。 它也會定義四個類別： A ，實作 介面的 IValue 基類; B 繼承自 A ，並從基類實作中隱藏其 GetValue 實作;直接繼承自 A ; C 以及 D ，其繼承自 A 並覆寫其 GetValue 方法。 然後，此範例會 MemberInfo 擷取類型每個成員的物件， (包括繼承自 Object) 的成員，並顯示其 DeclaringType 屬性的值。

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

請注意，的宣告類型 A.GetValue 為 A ，其中包含 B 兩 GetValue 個方法，一個由 A 和 一個 宣告 B ，而 宣告型別 D.GetValue 為 D 。

注意

DeclaringType 只會傳回成員名稱和其宣告型別的名稱。 若要傳回成員名稱及其原型，請呼叫 MemberInfo.ToString 。

備註

屬性 DeclaringType 會擷取宣告這個成員之型別之 物件的參考 Type 。 型別的成員是由型別所宣告或繼承自基底型別，因此 Type 屬性傳 DeclaringType 回的物件可能與用來取得目前 MemberInfo 物件的物件不同 Type 。

• Type如果取得這個 MemberInfo 物件的物件未宣告此成員，則 DeclaringType 屬性將代表其基底類型之一。

• MemberInfo如果 物件是全域成員 (，也就是說，如果從 Module.GetMethods 方法取得，這會傳回模組上的全域方法) ，則傳 DeclaringType 回的 會是 null 。