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Remove Handler at Runtime

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Join Date: Mar 2008

Posts: 324

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sonia sardana sonia sardana is offline

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Remove Handler at Runtime

Sep 22nd, 2009

I want to after clicking on button2,after that if i click on button1 then msg is not displayed

 Help with Code Tags 
 VB.NET Syntax (Toggle Plain Text) 
 
 
Public Class Form1
 
    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        MsgBox("sonia")
    End Sub
 
    Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
        RemoveHandler Button2.Click, AddressOf MYEVENTHandler
    End Sub
 
    Private Sub MYEVENTHandler(ByVal sender As System.Object, ByVal e As System.EventArgs)
 
    End Sub
End Class

Public Class Form1

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        MsgBox("sonia")
    End Sub

    Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
        RemoveHandler Button2.Click, AddressOf MYEVENTHandler
    End Sub

    Private Sub MYEVENTHandler(ByVal sender As System.Object, ByVal e As System.EventArgs)

    End Sub
End Class

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Join Date: Sep 2009

Posts: 25

Reputation: CodeDoctor is an unknown quantity at this point

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CodeDoctor CodeDoctor is offline

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Re: Remove Handler at Runtime

Sep 22nd, 2009

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Originally Posted by sonia sardana

I want to after clicking on button2,after that if i click on button1 then msg is not displayed
Help with Code Tags

VB.NET Syntax (Toggle Plain Text)
 
 
Public Class Form1
 
    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        MsgBox("sonia")
    End Sub
 
    Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
        RemoveHandler Button2.Click, AddressOf MYEVENTHandler
    End Sub
 
    Private Sub MYEVENTHandler(ByVal sender As System.Object, ByVal e As System.EventArgs)
 
    End Sub
End Class
Public Class Form1 Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click MsgBox("sonia") End Sub Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click RemoveHandler Button2.Click, AddressOf MYEVENTHandler End Sub Private Sub MYEVENTHandler(ByVal sender As System.Object, ByVal e As System.EventArgs) End Sub End Class

In your Form Load, setup the event handler for Button1. So, remove the statement Handles Button1.Click at the end of the Button1.Click procedure.

In your Form_Load place the following:
Addhandler Button1.Click, AddressOf MYEVENTHandler

In your MYEVENTHandler place the following code:
msgbox ("sonia")

In the Button2_Click, use the existing code you have, it will work.

Hope this helps.

Last edited by CodeDoctor; Sep 22nd, 2009 at 9:27 pm. Reason: typo