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11/18/2011

Type.GetMembers Method

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Returns all the public members of the current Type.

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

Syntax

'Declaration
Public Function GetMembers As MemberInfo()

public MemberInfo[] GetMembers()

Return Value

Type: array<System.Reflection.MemberInfo[]
An array of MemberInfo objects representing all the public members of the current Type.
-or-
An empty array of type MemberInfo, if the current Type does not have public members.

Remarks

Members include properties, methods, fields, events, and so on.

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

This method overload calls the GetMembers(BindingFlags) method overload, with BindingFlags.Public | BindingFlags.Instance | BindingFlags.Static (BindingFlags.PublicOrBindingFlags.InstanceOrBindingFlags.Static in Visual Basic). It will not find class initializers (.cctor). To find class initializers, use an overload that takes BindingFlags, and specify BindingFlags.Static | BindingFlags.NonPublic (BindingFlags.StaticOrBindingFlags.NonPublic in Visual Basic).

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.

Notes:

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.
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.
Custom attributes are not part of the common type system.

If the current Type represents a constructed generic type, this method returns the MemberInfo objects with the type parameters replaced by the appropriate type arguments.

If the current Type represents a type parameter in the definition of a generic type or generic method, this method searches the members of the class constraint, or the members of Object if there is no class constraint.

Platform Notes

Silverlight for Windows Phone

GetMethods and GetMembers do not return the same object instance on Silverlight for Windows Phone.

Examples

The following code example demonstrates how to use the GetMembers() method overload to collect information about all public members of a specified class.

Note:
To run this example, see Building Examples That Use a Demo Method and a TextBlock Control.

Class [MyClass]
   Public myInt As Integer = 0
   Public myString As String = Nothing


   Public Sub New()
   End Sub 'New

   Public Sub Myfunction()
   End Sub 'Myfunction
End Class '[MyClass]

Class Example

   Public Shared Sub Demo(ByVal outputBlock As System.Windows.Controls.TextBlock)
      Try
         Dim myObject As New [MyClass]()
         Dim myMemberInfo() As MemberInfo

         ' Get the type of 'MyClass'.
         Dim myType As Type = myObject.GetType()

         ' Get the information related to all public member's of 'MyClass'. 
         myMemberInfo = myType.GetMembers()

         outputBlock.Text += String.Format(ControlChars.Cr + "The members of class '{0}' are :" + ControlChars.Cr, myType) & vbCrLf
         Dim i As Integer
         For i = 0 To myMemberInfo.Length - 1
            ' Display name and type of the concerned member.
            outputBlock.Text += String.Format("'{0}' is a {1}", myMemberInfo(i).Name, myMemberInfo(i).MemberType) & vbCrLf
         Next i

      Catch e As SecurityException
         outputBlock.Text &= ("Exception : " + e.Message.ToString()) & vbCrLf
      End Try
   End Sub 'Main
End Class 'Type_GetMembers

class MyClass
{
   public int myInt = 0;
   public string myString = null;

   public MyClass()
   {
   }
   public void Myfunction()
   {
   }
}

class Example
{
   public static void Demo(System.Windows.Controls.TextBlock outputBlock)
   {
      try
      {
         MyClass myObject = new MyClass();
         MemberInfo[] myMemberInfo;

         // Get the type of 'MyClass'.
         Type myType = myObject.GetType();

         // Get the information related to all public member's of 'MyClass'. 
         myMemberInfo = myType.GetMembers();

         outputBlock.Text += String.Format("\nThe members of class '{0}' are :\n", myType) + "\n";
         for (int i = 0; i < myMemberInfo.Length; i++)
         {
            // Display name and type of the concerned member.
            outputBlock.Text += String.Format("'{0}' is a {1}", myMemberInfo[i].Name, myMemberInfo[i].MemberType) + "\n";
         }
      }
      catch (SecurityException e)
      {
         outputBlock.Text += "Exception : " + e.Message + "\n";
      }
   }
}

Version Information

Silverlight

Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0

XNA Framework

Supported in: Xbox 360, Windows Phone OS 7.0

Platforms

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.

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