SqlConnection myconnection = new SqlConnection("server=WIN-    42QG6PPQFE7\\SQLEXPRESS;database=asd;Integrated Security=true");
           SqlCommand mycommand = new SqlCommand("SELECT * FROM locate",myconnection);
           myconnection.Open();
           SqlDataReader dr = mycommand.ExecuteReader();
           int i = 0;
           while(dr.Read())
           {
               
                   //int numbers = int.Parse(dr[0].ToString());
                   //string names = dr[0].ToString();
                   //画图
                   //PieItem segment = myPane.AddPieSlice(numbers, defaultColors[i], Color.White, 45f, 0, names);
                   //segment.LabelType = PieLabelType.Value;
               i++;

                             
           }
          Response.Write(i);