EventHandlerType Property

EventInfo.EventHandlerType Property

Gets the Type object of the underlying event-handler delegate associated with this event.

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

'Declaration
Public Overridable ReadOnly Property EventHandlerType As Type

Property Value

Type: System.Type
A read-only Type object representing the delegate event handler.

Implements

_EventInfo.EventHandlerType

ExceptionCondition
SecurityException

The caller does not have the required permission.

The following example uses the EventHandlerType property to discover the delegate type of an event and to display its parameter types.

The example defines a delegate named MyDelegate and an event named ev of type MyDelegate. The code in the Main method discovers the event signature by getting the delegate type of the event, getting the Invoke method of the delegate type, and then retrieving and displaying the parameters.


' The following example uses instances of classes in 
' the System.Reflection namespace to discover an event argument type.
Imports System
Imports System.Reflection
Imports Microsoft.VisualBasic

Public Delegate Sub MyDelegate(ByVal i As Integer)
Public Class MainClass
    Public Event ev As MyDelegate

    Public Shared Sub Main()
        Dim delegateType As Type = GetType(MainClass).GetEvent("ev").EventHandlerType
        Dim invoke As MethodInfo = delegateType.GetMethod("Invoke")
        Dim pars As ParameterInfo() = invoke.GetParameters()
        Dim p As ParameterInfo
        For Each p In pars
            Console.WriteLine(p.ParameterType)
        Next p
    End Sub 'Main
End Class 'MainClass


.NET Framework

Supported in: 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Portable Class Library

Supported in: Portable Class Library

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

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

Community Additions

ADD
Show:
© 2016 Microsoft