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MemberInfo.GetCustomAttributes Method (Boolean)

Updated: January 2010

When overridden in a derived class, returns an array of all custom attributes applied to this member.

Namespace:  System.Reflection
Assembly:  mscorlib (in mscorlib.dll)
'Declaration
Public MustOverride Function GetCustomAttributes ( _
	inherit As Boolean _
) As Object()
'Usage
Dim instance As MemberInfo 
Dim inherit As Boolean 
Dim returnValue As Object()

returnValue = instance.GetCustomAttributes(inherit)

Parameters

inherit
Type: System.Boolean

true to search this member's inheritance chain to find the attributes; otherwise, false. This parameter is ignored for properties and events; see Remarks.

Return Value

Type: System.Object()
An array that contains all the custom attributes applied to this member, or an array with zero elements if no attributes are defined.

Implements

ICustomAttributeProvider.GetCustomAttributes(Boolean)
_MemberInfo.GetCustomAttributes(Boolean)
ExceptionCondition
InvalidOperationException

This member belongs to a type that is loaded into the reflection-only context. See How to: Load Assemblies into the Reflection-Only Context.

TypeLoadException

A custom attribute type could not be loaded.

This method ignores the inherit parameter for properties and events. To search the inheritance chain for attributes on properties and events, use the appropriate overloads of the Attribute.GetCustomAttributes method.

NoteNote:

In the .NET Framework version 2.0, this method returns security attributes on methods, constructors, and types if they are stored in the new metadata format. Assemblies compiled with version 2.0 use this format. Dynamic assemblies and assemblies compiled with earlier versions of the .NET Framework use the old XML format. See Emitting Declarative Security Attributes.

The following example defines a custom attribute and associates the attribute with MyClass.MyMethod, retrieves the attribute at run time, and displays the result.

Imports System
Imports System.Reflection
Imports Microsoft.VisualBasic

' Define a custom attribute with one named parameter.
<AttributeUsage(AttributeTargets.All)> Public Class MyAttribute
    Inherits Attribute
    Private myName As String 

    Public Sub New(ByVal name As String)
        myName = name
    End Sub 'New 

    Public ReadOnly Property Name() As String 
        Get 
            Return myName
        End Get 
    End Property 
End Class 'MyAttribute

' Define a class that has the custom attribute associated with one of its members. 
Public Class MyClass1

    <MyAttribute("This is an example attribute.")> Public Sub MyMethod(ByVal i As Integer)
        Return 
    End Sub 'MyMethod
End Class 'MyClass1


Public Class MemberInfo_GetCustomAttributes

    Public Shared Sub Main()
        Try 
            ' Get the type of MyClass1. 
            Dim myType As Type = GetType(MyClass1)
            ' Get the members associated with MyClass1. 
            Dim myMembers As MemberInfo() = myType.GetMembers()

            ' Display the attributes for each of the members of MyClass1. 
            Dim i As Integer 
            For i = 0 To myMembers.Length - 1
                Dim myAttributes As [Object]() = myMembers(i).GetCustomAttributes(False)
                If myAttributes.Length > 0 Then
                    Console.WriteLine("The attributes for the member {0} are: ", myMembers(i))
                    Dim j As Integer 
                    For j = 0 To myAttributes.Length - 1
                        Console.WriteLine("The type of the attribute is: {0}", myAttributes(j))
                    Next j
                End If 
            Next i
        Catch e As Exception
            Console.WriteLine("An exception occurred: {0}.", e.Message)
        End Try 
    End Sub 'Main
End Class 'MemberInfo_GetCustomAttributes

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC, Xbox 360, Zune

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0, 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 3.5, 2.0, 1.0

XNA Framework

Supported in: 3.0, 2.0, 1.0

Date

History

Reason

January 2010

Clarified that the inherit parameter is ignored for properties and events.

Customer feedback.

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