ComboBox Linked Datatable

void LinkComboBox()

{

using (SqlConnection sqlCon = new SqlConnection(connectionString))

{

sqlCon.Open();

SqlDataAdapter sqlDa = new SqlDataAdapter("SELECT * FROM Position", sqlCon);

DataTable dtbl = new DataTable();

sqlDa.Fill(dtbl);

cbxPosition.ValueMember = "PositionID";

cbxPosition.DisplayMember = "Position";

DataRow topItem = dtbl.NewRow();

topItem[0] = 0;

topItem[1] = "-Select-";

dtbl.Rows.InsertAt(topItem, 0);

cbxPosition.DataSource = dtbl;

}

}