ComboBox绑定数据源后再添加一条记录

很常用,不过我还是参考的别的地方的,先new一个DataTable,然后绑定,然后使用DataRow新添加一行,选择你要添加的字段.dr,dr是你数据库中的字段列.代码如下

 

DataTable dt = new DataTable();
            dt = SqlHelper.GetTable("DEPT");
            DataRow dr = dt.NewRow();
            dr["value"] = "全部";
            dt.Rows.InsertAt(dr, 0);
            cmbSearchDept.DataSource = dt;
            cmbSearchDept.DisplayMember = "NAME";
            cmbSearchDept.ValueMember = "ID";