Question

i have div in .aspx page:

<div id="mainWrapper" runat="server">
</div>

iwant to append div in run time.
In page load i try

mainWrapper.append("<div id="headerLeft"></div>");

but i am unbale to check if div id="headerLeft" already exist or not.if not then only append div.Thanks.

Answer 1

you could use mainWrapper.FindControl to check if the div already contains the other one and you add the inner one with mainWrapper.Controls.Add only if not exists.

but anyway, if you do something like this:

protected Page_Load(...)
{

 if(!IsPostBack)
 {
  // ... add the inner div...
 }

}

you would add the inner div only once.