C# winform combobox 在绑定数据之后插入一项选择项

       /**//// <summary>

        /// 填充comboboxB超医师 [email protected] 涂聚文

        ///2009-02-16

        /// </summary>

        private void setDBPyhNameComboBox()

        {



            this.combPhy.DataSource = null;



            DBConnectioin dbc = new DBConnectioin();

            SqlConnection conn = new SqlConnection(DBConnectioin.conStr);

            conn.Open();

            //DbHelperSQL.setComboList(combPhy, "select PhyID,PhyName  from Physician", "Physician", "PhyName", "PhyID");

            string sSQL = "select PhyID,PhyName  from Physician";

            string sTable = "Physician";



 

            DataSet dsCourtesy = new DataSet();

            SqlDataAdapter daCourtesy = new SqlDataAdapter();

            DbHelperSQL.setCommand(dsCourtesy, daCourtesy, sSQL, sTable);

            daCourtesy.Fill(dsCourtesy);

            combPhy.DataSource = dsCourtesy.Tables[0].DefaultView;              

            DataRow dr = dsCourtesy.Tables[0].NewRow();

            combPhy.DisplayMember = "PhyName";

            combPhy.ValueMember = "PhyID";            

            dr["PhyName"] = "全部";  

            dr["PhyID"] = -1;  

            dsCourtesy.Tables[0].Rows.InsertAt(dr, 0);

            //combPhy.Text = "全部";





        }

默认让combobox选择一项

comboBox.SelectIndex = 0