Export (0) Print
Expand All
This topic has not yet been rated - Rate this topic

Type.GetNestedTypes Method ()

.NET Framework 1.1

Returns all the types nested within the current Type.

[Visual Basic]
Overloads Public Function GetNestedTypes() As Type()
[C#]
public Type[] GetNestedTypes();
[C++]
public: Type* GetNestedTypes() [];
[JScript]
public function GetNestedTypes() : Type[];

Return Value

An array of Type objects representing all the types nested within the current Type.

-or-An empty array of type Type, if no types are nested within the current Type.

Remarks

The following table shows what members of a base class are returned by the Get methods when reflecting on a type.

Member Type Static Non-Static
Constructor No No
Field No Yes. A field is always hide-by-name-and-signature.
Event Not applicable The common type system rule is that the inheritance is the same as that of the methods that implement the property. Reflection treats properties as hide-by-name-and-signature. See note 2 below.
Method No Yes. A method (both virtual and non-virtual) can be hide-by-name or hide-by-name-and-signature.
Nested Type No No
Property Not applicable The common type system rule is that the inheritance is the same as that of the methods that implement the property. Reflection treats properties as hide-by-name-and-signature. See note 2 below.
  1. Hide-by-name-and-signature considers all of the parts of the signature, including custom modifiers, return types, parameter types, sentinels, and unmanaged calling conventions. This is a binary comparison.
  2. For reflection, properties and events are hide-by-name-and-signature. If you have a property with both a get and a set accessor in the base class, but the derived class has only a get accessor, the derived class property hides the base class property, and you will not be able to access the setter on the base class.
  3. Custom attributes are not part of the common type system.

Example

[Visual Basic, C#, C++] The following example defines a nested class and a struct in MyClass and obtains objects of the nested types using the type object of MyClass.

[Visual Basic] 
Imports System
Imports System.Reflection

Public Class MyClass1
    Public Class NestClass
        Public Shared myPublicInt As Integer = 0
    End Class 'NestClass

    Public Structure NestStruct
        Public myPublicInt As Integer
    End Structure 'NestStruct
End Class 'MyClass1

Public Class MyMainClass
    Public Shared Sub Main()
        Try
            ' Get the Type object corresponding to MyClass.
            Dim myType As Type = GetType(MyClass1)
            ' Get an array of nested type objects in MyClass.                 
            Dim nestType As Type() = myType.GetNestedTypes()
            Console.WriteLine("The number of nested types is {0}.", nestType.Length)
            Dim t As Type
            For Each t In nestType
                Console.WriteLine("Nested type is {0}.", t.ToString())
            Next t
        Catch e As Exception
            Console.WriteLine("Error", e.Message.ToString())
        End Try
    End Sub 'Main
End Class 'MyMainClass

[C#] 

using System;
using System.Reflection;
public class MyClass 
{
    public class NestClass 
    {
        public static int myPublicInt=0;
    }
    public struct NestStruct
    {
        public static int myPublicInt=0;
    }
}

public class MyMainClass 
{
    public static void Main() 
    {
        try
        {
            // Get the Type object corresponding to MyClass.
            Type myType=typeof(MyClass);
            // Get an array of nested type objects in MyClass. 
            Type[] nestType=myType.GetNestedTypes();
            Console.WriteLine("The number of nested types is {0}.", nestType.Length);
            foreach(Type t in nestType)
                Console.WriteLine("Nested type is {0}.", t.ToString());
        }
        catch(Exception e)
        {
            Console.WriteLine("Error"+e.Message);  
        }         
    }
}

[C++] 

#using <mscorlib.dll>

using namespace System;
using namespace System::Reflection;

public __gc class MyClass {
public:
   __gc class NestClass {
   public:
      static int myPublicInt=0;
   };
   __gc struct NestStruct {
   public:
      static int myPublicInt=0;
   };
};

int main() {
   try {
      // Get the Type object corresponding to MyClass.
      Type* myType=__typeof(MyClass);
      // Get an array of nested type objects in MyClass.
      Type* nestType[]=myType->GetNestedTypes();
      Console::WriteLine(S"The number of nested types is {0}.",__box( nestType->Length));
      System::Collections::IEnumerator* myEnum = nestType->GetEnumerator();
      while (myEnum->MoveNext()) {
         Type* t = __try_cast<Type*>(myEnum->Current);
         Console::WriteLine(S"Nested type is {0}.", t);
      }
   } catch (Exception* e) {
      Console::WriteLine(S"Error {0}", e->Message);
   }
}

[JScript] No example is available for JScript. To view a Visual Basic, C#, or C++ example, click the Language Filter button Language Filter in the upper-left corner of the page.

Requirements

Platforms: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family, Common Language Infrastructure (CLI) Standard

See Also

Type Class | Type Members | System Namespace | Type.GetNestedTypes Overload List | GetNestedType

Did you find this helpful?
(1500 characters remaining)
Thank you for your feedback
Show:
© 2014 Microsoft. All rights reserved.