index > Windows Forms General > Please help

Please help

I want to add Onload event for my windows user control. But I am not getting the idea where to call this event in my control.Can somebody help me please its very urgent?

Chatanya Friday, April 21, 2006 1:59 PM

Hello Chatanya.

The closest I have come to is

Form OldParent;

protected override void OnParentChanged(EventArgs e)

{

if (OldParent!=null)

{ OldParent.FormClosed -= new FormClosedEventHandler(OnFormClosed); }

base.OnParentChanged(e);

if (this.ParentForm!=null)

{

this.ParentForm.FormClosed += new FormClosedEventHandler(OnFormClosed);

this.OldParent = this.ParentForm;

}

void OnFormClosed(object sender, FormClosedEventArgs e)

{

// Cleanup code

System.Diagnostics.Debug.WriteLine("Unloading");

}

What this code does is, whenever the control's parent is changed it subscribes to the form's ClosedEvent. Whenever the form is Closed, theEvent is triggered and the control should be in the process of unloading. Thbe OldParent code is there to ensure that events do not stay attached or get subscribed to multiple times.

I'm not sure what you are trying to use this code for so i can't say whether this will accomplish what you really need.

MarcD Monday, April 24, 2006 1:49 PM

the OnLoad Event already exists for a UserControl. If you want code inside the UserControl to execute upon the load simply do this

protected override void OnLoad(EventArgs e)

{

// code to execute

base.OnLoad(e);

}

If you have code that is outside, say in the Form that is going to host it then simply bind to it through the designer by clicking on the controlon your form in the designer going to properties and then clicking on events and finding the Load event. You can do it manualy by putting

userControl11.Load += new EventHandler(userControl11_Load); this after the InitializeComponent()

(assuming C#. If not please provide more information like what version of .NET and what language)

Hope this helps.

MarcD Friday, April 21, 2006 2:45 PM

Hi,

U r correct but sorry for typo mistake.

It is for UnLoad event.

thanks for looking into my problem

Chatanya Friday, April 21, 2006 2:47 PM

Hello Chatanya.

The closest I have come to is

Form OldParent;