说明: private void Form1_Load(object sender, EventArgs e) { string sql = string.Format(@"select Id,CityName from CityInfo"); dataadapter = new SqlDataAdapter(sql, DBhelper.connection); dataadapter.Fill(dataset, "Cmb"); //为下拉列表添加“全部”这个选项 DataRow row = data
<jianghaohaoge> 上传 | 大小:55kb