无法在动态添加的用户控件中获取文本框以维持状态

Question

I have tried what seems like everything - I've done similiar things many times before, but I'm obviously missing something.

I have a UserControl (ucA) - on ucA is a LinkButton that loads a different UserControl (ucB) programatically into a panel on ucA. ucB has TextBoxes, etc.

Why isn't my control maintaining it's state? ie: The textboxes are loosing thier value on postback - the control tree shows the name of the control and the Form values show the value (in trace.axd)

Here is the code for ucA (basically)

public int SlideCount
{
    get { return Convert.ToInt32(ViewState["SlideCount"]); }
    set { ViewState["SlideCount"] = value; }
}

protected void LinkButton1_Click(object sender, EventArgs e)
{
    SlideCount += 1;
    LoadSlideControls();
}

protected override void OnInit(EventArgs e)
{
    base.OnInit(e);
    LoadSlideControls();
}

private void LoadSlideControls()
{
    this.pnlAnnouncementHolder.Controls.Clear();
    for (int i = 0; i < SlideCount; i++)
    {
        this.pnlAnnouncementHolder.Controls.Add(
            LoadControl("AnnouncementSlide.ascx"));
    }
}

Heres a full example of what im trying to do: http://keithsblogs.com/ControlTest2.zip

The problem Vyrotek points out is that the control is added a little to late to the lifecycle on the click event - anyone have any ideas?

Answer 1

I just tried to recreate what you have setup and I dont seem to experience the same problem. Would you like me to send you my Solution somehow?

Final Edit, I promised -

Try this solution: http://www.vyrotek.com/code/ControlTest2.zip

Answer 2

I am installing express edition as I type. By that time, why should you clear the controls on click of the button? cant you just add/load the uc once control on click of the link?

By doing this, you would not be clearing the old controls and they would retain the value.