Hey Lyuba,

I tried a sample with 2 tabs and the property PostBackOptions-EnableLoadOnDemand="true".

Tab 1 has UserControlUrl property set to "WebUserControl1.ascx"
Tab 2 has UserControlurl property set to "WebUserControl2.ascx"

Both user controls has a textbox and the following code in the page_load event -
if (!Page.IsPostBack)
{
    TextBox1.Text = DateTime.Now.ToString();
}

When the page is first loaded (i.e. IsPostBack=false), only page_load of UserControl1 is executed. When I now click on tab 2, page_load of both the user controls are executed twice and both the times, the IsPostBack=true. The code in the page_load event of UserControl2 does not fire because of the IsPostBack=true. This means both the user controls are loaded during the initial page load. This is not what I am looking for.

I want the user control to load on tab click. That means, when a tab is clicked, IsPostBack property should be false. As if, you are loading the control programmatically.

Can this achieved using the WebTab control?

I am attaching the sample for your reference. I would really appreciate, if you can guide in the right direction. I had to remove the ig_res folder from the zip file due to file size upload restriction.