顶一个,继续求指教

 //清空原有图形
        LineChart1.Graphs.Clear();
你要查询的sql语句
//添加数据线对象
        LineChartGraph lineChartGraph = new LineChartGraph();
        //顶点形状为圆点
        lineChartGraph.Bullet = LineChartBulletTypes.Round;
        //顶点颜色
        lineChartGraph.BulletColor = Color.Blue;
        //向下面积图的颜色
        lineChartGraph.FillColor = Color.Yellow;
        //向下面积图的透明度
        lineChartGraph.FillAlpha = Convert.ToByte(20);
        //添加数据
        //Y轴值在右边(默认在左边)
        //lineChartGraph.Axis = LineChartAxes.Right;

        lineChartGraph.DataSource = dataSet;//数据源
        lineChartGraph.DataSeriesItemIDField = "Time";//标识字段
        lineChartGraph.DataValueField = ddlName.Text.Trim();//值字段
        lineChartGraph.Title = ddlName.SelectedItem.Text.Trim();//数据系列标题
        //添加线条到图形
        LineChart1.Graphs.Add(lineChartGraph);
               
        //添加Y轴单位说明
        LineChart1.Labels.Add(new ChartLabel("", new Unit(80), new Unit(80))); //单位为mm
        LineChart1.DataSource = dataSet;
        LineChart1.DataSeriesIDField = "Time";
        LineChart1.DataBind();