VS2008 MsChart的使用有关问题

            string myConnectionString = ReportForm.Properties.Settings.Default.CEC710ConnectionString;            string mySelectQuery="SELECT vol_va,vol_vb,vol_vc,cur_ia,cur_ib,cur_ic,opertime FROM [AmmeterData103]";            SqlConnection myConnection = new SqlConnection(myConnectionString);            SqlCommand myCommand = new SqlCommand(mySelectQuery, myConnection);             // Set chart data source            chart1.DataSource = myCommand;            chart1.BorderlineWidth = 3;            // Set series members names for the X and Y values             chart1.Series["A相电压"].XValueMember = "OperTime";            chart1.Series["A相电压"].YValueMembers = "vol_va";            chart1.Series["B相电压"].XValueMember = "OperTime";            chart1.Series["B相电压"].YValueMembers = "vol_vb";            chart1.Series["C相电压"].XValueMember = "OperTime";            chart1.Series["C相电压"].YValueMembers = "vol_vc";            chart1.Series["A相电流"].XValueMember = "OperTime";            chart1.Series["A相电流"].YValueMembers = "cur_ia";            chart1.Series["B相电流"].XValueMember = "OperTime";            chart1.Series["B相电流"].YValueMembers = "cur_ib";            chart1.Series["C相电流"].XValueMember = "OperTime";            chart1.Series["C相电流"].YValueMembers = "cur_ic";            // Data bind to the selected data source            chart1.DataBind();            foreach (Series s in chart1.Series)            {                s.ChartType = SeriesChartType.Spline;                        }