学步园

DataTable QYu = myDataSet.Tables[0].DefaultView.ToTable(true, "_QYU");
//DataView view = new DataView(QYu);
DataRow row = QYu.NewRow();
row["_QYU"] = "选区域";
QYu.Rows.Add(row);
AQYu.DataSource = QYu;//获取不重复的值
AQYu.DisplayMember = "_QYU";
AQYu.ValueMember = "_QYU";
AQYu.Text = "选区域";//最后设置就可以在加载首次显示