How to display default text inside combo box inside datagridview in c# windows application.

Question

Hi

I am developing application in C#.

   In the design mode I have created combobox  'cmbItemName'

inside datagridview "gvInvoiceDetails".

 I have added records using datatable inside combobox in form load event  .

I want to display "select"    as    initial row  and it is default  inside combo box.  

In the form load event,I have written code

cmbItemName.Items.Insert(0, "--Select--");

            cmbItemName.DataSource = FethItemCode();

            cmbItemName.ValueMember = "ItemCode";

            cmbItemName.DisplayMember = "itemName";

  public DataTable FethItemCode()

        {

            string sql = "Select Distinct ItemCode,itemName From ItemMaster";

            SqlConnection conn = new SqlConnection(conString);

            conn.Open();

            SqlDataAdapter da = new SqlDataAdapter(sql, conn);

            DataTable dt = new DataTable();

            da.Fill(dt);

            return dt;

        }

           

     to display "Select"  I have written code

       for (int i = 0; i < cmbItemName.Items.Count; i++)

            {

                if (cmbItemName.Items[i].ToString() == "0")//

                {

                    cmbItemName.DefaultCellStyle.NullValue = "Select";

                }

            }

But it is not working

Is the code to be written in    gvInvoiceDetails_EditingControlShowing  event ?

Thanks

Chandran