Add Column Number at first row of Grid

Following function adds column number at first row in your datatable.

        public static void AddColumnNumberInGrid(DataSet ds, int startColumnIndex)

        {

            object[] cols = new object[ds.Tables[0].Columns.Count];

            for (int i = 0; i < cols.Length; i++)

            {

                if (i >= startColumnIndex)

                {

                    cols[i] = (i + 1 - startColumnIndex).ToString();

                }

                else

                {

                    //cols[i] = String.Empty;

                }

            }

            DataRow row = ds.Tables[0].NewRow();

            row.ItemArray = cols;

            ds.Tables[0].Rows.InsertAt(row, 0);

            ds.AcceptChanges();

        }