create dropdown in datatable c# dynamically

DataTable dtt1 = (DataTable)Session[“dbasecolumns”];<br /> int l = dtt1.Columns.Count;<br /> string[] sqlcolumn = new string[l];<br /> DropDownList drd = new DropDownList();<br /> foreach (String colname in sqlcolumn)<br /> {<br /> drd.Items.Add(colname);<br /> }