ViewState don't saved on a custom control

[lirlir]

Hi to all,

i have this problem:
my sample combine 2 components,

the first one is a simple aspx page (T1.aspx) with a
Button runat server and with the next code:

private void Page_Load(object sender, System.EventArgs e)
{
C1 c = new C1();

this.FindControl("Form1").Controls.Add(c);

}

the second component is a UserControl (C1.ascx) that i create dynamiclly like that:
protected override void Render(HtmlTextWriter writer)
{
TextBox txt = new TextBox();

txt.ID="txtSelectedParams" + UniqueID ;
this.Controls.Add(txt);

base.Render(writer);
}

the problem is that after postback the value on the textbox is gone....

please help me by let me know what am i doing wrong.

lirlir

 

[Teemu Keiski]

Hi,

adding TextBox at Render stage is too late in the Page lifecycle. Postback
data loading occurs first time between Init and Load and second time right
after Load, so if you want to get your TextBox's postback data loaded
automatically, it would need to be added to the Controls collection at Load
(at the latest). However, if you want or need to do it manually, you can
access it via Request.Form collection.

Here's more background information:
http://www.asp.net/Forums/ShowPost.aspx?tabindex=1&PostID=391019
http://www.asp.net/Forums/ShowPost.aspx?tabindex=1&PostID=285389

 

[lirlir]

Thanks mate ,

the links were grate it solved my problem.