Type.GetNestedTypes Method

July 28, 2014

When overridden in a derived class, searches for the types nested in the current Type, using the specified binding constraints.

Namespace:  System
Assembly:  mscorlib (in mscorlib.dll)

'Declaration
Public MustOverride Function GetNestedTypes ( _
	bindingAttr As BindingFlags _
) As Type()

Parameters

bindingAttr
Type: System.Reflection.BindingFlags
A bitmask comprised of one or more BindingFlags that specify how the search is conducted.
-or-
Zero, to return Nothing.

Return Value

Type: System.Type ()
An array of Type objects representing all the types nested in the current Type that match the specified binding constraints (the search is not recursive), or an empty array of type Type, if no nested types are found that match the binding constraints.

The search for nested types is not recursive.

The GetNestedTypes method does not return types in a particular order, such as alphabetical or declaration order. Your code must not depend on the order in which types are returned, because that order varies.

The following BindingFlags filter flags can be used to define which nested types to include in the search:

  • You must specify either BindingFlags.Public or BindingFlags.NonPublic to get a return.

  • Specify BindingFlags.Public to include public nested types in the search.

  • Specify BindingFlags.NonPublic to include non-public nested types (that is, private and protected nested types) in the search.

This method returns only the nested types of the current type. It does not search the base classes of the current type. To find types that are nested in base classes, you must walk the inheritance hierarchy, calling GetNestedTypes at each level.

BindingFlags.Instance and BindingFlags.Static are ignored.

Calling this method with only the BindingFlags.Public flag or only the BindingFlags.NonPublic flag will return the specified nested types and does not require any other flags.

See System.Reflection.BindingFlags for more information.

If the current Type represents a type parameter in the definition of a generic type or generic method, this method searches the nested types of the class constraint.

If a nested type is generic, this method returns its generic type definition. This is true even if the enclosing generic type is a closed constructed type.

NoteNote:

If the current Type represents a generic type defined in C#, Visual Basic, or C++, its nested types are all generic even if they have no generic parameters of their own. This is not necessarily true of nested types defined in dynamic assemblies or compiled with the Microsoft intermediate language (MSIL) assembler.

For information on nested generic types, and on constructing nested generic types from their generic type definitions, see MakeGenericType.

Version Notes

Windows Phone

 GetNestedTypes returns all nested types regardless of the BindingFlags value.

The following example creates two nested public classes and two nested protected classes, and displays information for classes that match the specified binding constraints.



Imports System.Reflection
Imports System.Reflection.Emit

' Create a class with name 'MyTypeClass' with three properties.
Public Class MyTypeClass

   Public Class Myclass1
   End Class 'Myclass1


   Public Class Myclass2
   End Class 'Myclass2


   Protected Class MyClass3
   End Class 'MyClass3

   Protected Class MyClass4
   End Class 'MyClass4
End Class 'MyTypeClass


Public Class Example

   Public Shared Sub Demo(ByVal outputBlock As System.Windows.Controls.TextBlock)

      Dim myType As Type = GetType(MyTypeClass)
      ' Get the public nested classes.
      Dim myTypeArray As Type() = myType.GetNestedTypes((BindingFlags.Public Or BindingFlags.Instance))
      outputBlock.Text += String.Format("The number of public nested classes is {0}.", myTypeArray.Length.ToString()) & vbCrLf
      ' Display all the public nested classes.
      DisplayTypeInfo(outputBlock, myTypeArray)
      ' Get the nonpublic nested classes.
      Dim myTypeArray1 As Type() = myType.GetNestedTypes((BindingFlags.NonPublic Or BindingFlags.Instance))
      outputBlock.Text += String.Format("The number of protected nested classes is {0}.", myTypeArray1.Length.ToString()) & vbCrLf
      ' Display  the information for all nested classes.
      DisplayTypeInfo(outputBlock, myTypeArray1)
   End Sub 'Main

   Public Shared Sub DisplayTypeInfo(ByVal outputBlock As System.Windows.Controls.TextBlock, ByVal myArrayType() As Type)
      ' Display the information for all nested classes.
      Dim i As Integer
      For i = 0 To myArrayType.Length - 1
         Dim myType As Type = CType(myArrayType(i), Type)
         outputBlock.Text += String.Format("The name of the nested class is {0}.", myType.ToString()) & vbCrLf
      Next i
   End Sub 'DisplayTypeInfo
End Class 'TypeMain 


Windows Phone OS

Supported in: 8.1, 8.0, 7.1, 7.0

Windows Phone

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