private void DataLoad()
    {
        DataTable dt1 = GroupInfo.GetGroupCurrentGrainByCargoName();
        DataTable dt2 = GroupInfo.GetGroupCurrentGrainByStorage();

        Series series1 = chart1.Series[0];        //数据集声明

        series1.ToolTip = "#LEGENDTEXT: #VAL{C} million";
        series1.Points.DataBind(dt1.Rows, "MaterialName", "weight", "LegendText=MaterialName,YValues=weight,ToolTip=MaterialName");

        Series series2 = chart2.Series[0];        //数据集声明

        series2.ToolTip = "#LEGENDTEXT: #VAL{C} million";
        series2.Points.DataBind(dt2.Rows, "WHName", "weight", "LegendText=WHName,YValues=weight,ToolTip=WHName");
    }