Adding controls in to ultrawebgrid using PreRenderMethod.

TemplatedColumn col = (TemplatedColumn)uwgProduct.DisplayLayout.Grid.Bands[0].Columns.FromKey("HeaderCheck");
int rowTotalCount = uwgProduct.Rows.Count;
for (int rowcount = 0; rowcount < rowTotalCount; rowcount++)
{
CellItem objcellITem = (CellItem)col.CellItems[rowcount];
DropDownList drp = new DropDownList();
drp.Items.Add(new ListItem("test", "ss"));
drp.ID = "dd";
objcellITem.Controls.Add(drp);
}