Adding UserControl to Page

[Stevo Z]

Hi, I have one default.aspx page and many .ascx user controls that are displayed inside default.aspx page. There is always only one .ascx user control in the default page (placeholder) at one time. This page is added dynamicly in Page_Load of the default.aspx :

protected void Page_Load(object sender, EventArgs e)
{
this.LoadContent();
}

public void LoadContent()
{
this.placeholderContent.Controls.Clear();
this.placeholderContent.Controls.Add(this.LoadControl([...some mechanism how to get right file...]));
}

during Page_Load of currently loaded user control, it might happen that depending on user action this control requires to be changed to different .ascx user control, so LoadContent (in default.aspx) is called to dump current control and load new one. Problem occurs that when a new control is loaded after an old control was dumped, events (button clicks) of new added control are not registred properly. When a button on new control is clicked, it doesn't invoke the registered event during next postback. Event's start working from second postback on... (if the user control doesn't change) thanx for help!

zilo

[Christian Graus]

I thnk Page Load is too late to do this, you need to do it in the loadviewstate event for events to fire properly.

Christian Graus - Microsoft MVP - C++ "also I don't think "TranslateOneToTwoBillion OneHundredAndFortySevenMillion FourHundredAndEightyThreeThousand SixHundredAndFortySeven()" is a very good choice for a function name" - SpacixOne ( offering help to someone who really needed it ) ( spaces added for the benefit of people running at < 1280x1024 )

[Urs Enzler]

You have to use the LoadControl method of the page class. This way, the "state" of the user control reflects the "state" of the page. For more information search with google for "dynamically add usercontrol asp.net"

-^-^-^-^-^-^-^-^-^-^-^- no code is free of bugs

[Stevo Z]

Hi, thanx for answer, I'll try that.

zilo

[Stevo Z]

That's what I do - use LoadControl of the Page class. I'll try google that link. thank you

zilo

[Stevo Z]

Hi, I've seen many tutorials and they all have one thing in common. They are very simple and do not cover this problematics deeply enough. I did not learn anything new. I would appreciate your help if you have any experience in dynamic loading and changing user controls. thanx

zilo

[Stevo Z]

Hi, when adding controls to my placeholder in loadviewstate , they are not displayed at all

zilo

[ChrisKo 0]

Move it from Page_Load to Page_OnInit and hopefully that should fix your problem.

[Stevo Z]

It did not help. It behaves same way as when in Page_Load :(

zilo