Question

Good morning everybody.

I have a question connected with controls and event handling. Lets say I want to create a LinkButton.

protected void loadLinkButton()
{
    ContentPlaceHolder content = (ContentPlaceHolder)this.Master.FindControl("MainContent");
    LinkButton lnk = new LinkButton();
    lnk.ID = "lnikBtn";
    lnk.Text = "LinkButton";
    lnk.Click += new System.EventHandler(lnk_Click);
    content.Controls.Add(lnk);
}

Here is the event handler:

protected void lnk_Click(object sender, EventArgs e)
{
    Label1.Text = "ok!";
}

If I run the loadLinkButton function inside Page_Load everything is ok. But when I try to run the loadLinkButton by clicking simple button, link button is created but event is not handled.

protected void Button1_Click(object sender, EventArgs e)
{
    loadLinkButton();
}

I there any way to solve it? Or loadLinkButton must always regenerated on Page_Load, Page_init etc.

Answer 1

When working with dynamic controls, I always add the control in Page_Init, because viewstate loading will happen right after Init. If you add it to Page_Load, there is a chance that you will lose viewstate. Just make sure you provide a unique control ID.