Question

I Add Control Dynamiclly but; easc Postback event my controls are gone. I Can not see again my controls.

So How can I add control ?

Answer 1

Add the controls in the Page’s Init event and they will be preserved in viewstate when posting back. Make sure they have a unique ID.

See this link…

ASP.NET Add Control on postback

A very trivial example..

public partial class MyPage : Page
{
    TextBox tb;

    protected override void OnInit(EventArgs e)
    {
        base.OnInit(e);
        tb = new TextBox();
        tb.ID = "testtb";
        Page.Form.Controls.Add(tb);
    }

    protected override void OnLoad(EventArgs e)
    {
        base.OnLoad(e);
        //tb.Text will have whatever text the user entered upon postback
    }
}