Binding dropdownlist inside gridview edititemtemplate

Question

I\'m not able to bind my dropdownlist present in edititem template . I am getting null reference when i try to access it.

My design:

Answer 1

The event RowEditing occurs just before a row is edited.

You should use the RowDataBound event instead.

protected void gv_RowDataBound(object sender, GridViewRowEventArgs e)
{
   if (gv.EditIndex == e.Row.RowIndex && 
       e.Row.RowType==DataControlRowType.DataRow) 
   {       
       DropDownList drpcategory1 = (DropDownList)e.Row.FindControl("drpcategory1"); 
       //bind the control
   }
}