Button Behaviour

[George1111]

I have a button called "butCancel"

I have an event called "butCancel_Click"

Private Sub butCancel_Click(ByVal sender As System.Object, ByVal e As System.EventArgs)
        CancelAction()
    End Sub

When I click on the button in design mode, I expect it to go to the "butCancel_Click" event

It doesn't go there but rather, it opens up a NEW event called "butCancel_Click_1"

   Private Sub butCancel_Click_1(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles butCancel.Click

    End Sub

Now where is the logic behind this please ?

Both events are in the same section of the form directly under each other and there is only one button in my project called "butCancel"

[DSJ]

You need to add "Handles butCancel_Click" at the end of the declaration.

[GremlinSA]

DSJ has it right.. here is why...

In VB6 the Sub name was subject to the controls name .. IE. Clicking Button Click1 will call event Click1_Click...

In .Net you can name the sub anything you like, as long as you assign it to an event.. using

 Handles Object.Event

hence clicking Button Click1 can call a sub named Close_And_Save_Everything_And_Exit simply by defining it

Private Sub Close_And_Save_Everything_And_Exit(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Click1.Click

Gremmy

[DSJ]

Further... you can add handlers via code with the AddHandler statement.

[Shuja Ali]

There is a slight difference between Event and Event Handler. Event is something that happens when User does something (clicking a button, typing text, etc) in your application.

Event Handler is a method that is used to write implementation of what is going to happen when that particular event is triggered.

In .NET the terminology has become little too easy. You have an Event and an Event Handler. Event Handler can be given any name (not necessarily button1_click, it can be anything like mybutton_was_clicked or newMethod). All you need to make sure is that your code knows which method to call when an event is triggered, which is given by Handles or AddHandler keywords.

Remember Events are actually implemented using Delegates in .NET. So it will be of great help if you learn Delegates also.

[George1111]

Thanks guys !

Welcome to VB.Net school, George !

Grade F

[GremlinSA]

Thanks guys !

Welcome to VB.Net school, George !

Grade F

Lol .. Na... I'd give ya a 'D' grade...