Question

Im trying to load a usercontrol dynamically on a aspx page however it works but i get postback issues?? I have a image button on usercontrol which I want to show a image however when i do click on button the page refreshes and does not show image?. I have a placeholder on aspx page and backend code i have this :

 protected void Page_Load(object sender, EventArgs e)
 {      

     if (!IsPostBack)
     {
            Control uc = Page.LoadControl("~/UserControls/Mycontrol.ascx");
            placeholder1.Controls.Add(uc);

     }
 }

Do i need to do something in page_preinit or page_init ??

Answer 1

Dynamic controls added to the page must be added on every postback, not just the first one. Remove the !IsPostBack condition. Secondly, they have to be added during init or preinit, because that way, viewstate will be captured and restored properly (ASP.NET restores viewstate between init and load events).