MSChart使用导航之开发

介绍过基础的MSchart知识后，大家应该容易上手写代码了，最起码搞几个饼图柱状图什么的不在话下了。下面我们看看如何在实际项目中写代码。

1. 柱状图
   

    1:  string strSQL;   

    2:  DataSet ds = new DataSet();

    3:  Chart1.ChartAreas[0].Name = "chartArea1";

    4:  Chart1.Titles.Add("chartArea1");

    5:  Chart1.Titles[0].Font = new Font("????", 14, FontStyle.Bold);   

    6:  strSQL = "select col1,col2 from Report";   

    7:  ds.Tables.Add(DBSQL.Query(strSQL, 300).Tables[0].Copy());   

    8:  ds.Tables[0].TableName = "chartArea1";

    9:  if(ds.Tables[0].Rows.Count > 0)   

   10:  {

   11:      Chart1.Series[0].Name = "chartArea1";

   12:      Series ser_qqgzjz = Chart1.Series[0];

   13:      ser_qqgzjz.ChartArea = "chartArea1";

   14:       ser_qqgzjz.Points.DataBind(ds.Tables["qqgzjz"].Rows, "col2", "col1", "");

   15:      ser_qqgzjz.IsValueShownAsLabel = true;

   16:      Chart1.ChartAreas["chartArea1"].AxisY.Title = "Person";

   17:      Chart1.ChartAreas["chartArea1"].AxisX.MinorGrid.LineWidth = 0;

   18:      Chart1.ChartAreas["chartArea1"].AxisX.LabelStyle.Angle = -45;

   19:      Chart1.ChartAreas["chartArea1"].AxisX.MajorGrid.LineDashStyle = ChartDashStyle.NotSet;

   20:      Chart1.ChartAreas["chartArea1"].AxisY.MajorGrid.LineDashStyle = ChartDashStyle.Dash;

   21:  }

2. 双纵坐标（含百分比）
   

    1:  // chart is your mschart control,srcSeriesName is the name of source series name,destSeriesName  

    2:  // is the name of series you want to add,which is percent series,totalCount is the number 

    3:  // which to caculator the percent  

    4:  protected void TowGrid(Chart chart, string srcSeriesName, string destSeriesName, double totalCount)

    5:  {

    6:      string strChartArea = chart.Series[srcSeriesName].ChartArea;

    7:      chart.Series[srcSeriesName].ChartType = SeriesChartType.Column;

    8:      double total = totalCount;

    9:      Series destSeries = new Series(destSeriesName);

   10:      chart.Series.Add(destSeries);

   11:      destSeries.ChartType = SeriesChartType.Line;

   12:      destSeries.BorderWidth = 3;

   13:      destSeries.ChartArea = chart.Series[srcSeriesName].ChartArea;

   14:      destSeries.YAxisType = AxisType.Secondary;

   15:      chart.ChartAreas[strChartArea].AxisY2.Maximum = 100;

   16:      chart.ChartAreas[strChartArea].AxisY2.Title = "??????%??";

   17:      chart.ChartAreas[strChartArea].AxisY2.TitleFont = new Font("??????", 10);

   18:      destSeries.LabelFormat = "P1";

   19:      chart.ChartAreas[strChartArea].AxisY2.MajorGrid.LineDashStyle = ChartDashStyle.NotSet;

   20:      chart.ChartAreas[strChartArea].AxisX.LabelStyle.IsEndLabelVisible = false;

   21:      double percentage = 0.0;

   22:      foreach (DataPoint pt in chart.Series[srcSeriesName].Points)

   23:      {

   24:        percentage = (pt.YValues[0] * 100.0 / total);

   25:        destSeries.Points.Add(Math.Round(percentage, 2));

   26:      }

   27:      chart.Series[destSeriesName].IsValueShownAsLabel = true;

   28:      chart.Series[destSeriesName].MarkerColor = Color.Red;

   29:      chart.Series[destSeriesName].MarkerBorderColor = Color.MidnightBlue;

   30:      chart.Series[destSeriesName].MarkerStyle = MarkerStyle.Circle;

   31:      chart.Series[destSeriesName].MarkerSize = 8;

   32:      chart.Series[destSeriesName].LabelFormat = "0.#";

   33:    }

   34:  }

   通过以上代码的结合，就能制作出如下效果的图表：

 PS：不少网友遇到横坐标值不能完全显示的问题，只需要修改横坐标的间隔值即可。如：

 chart_ser.ChartAreas[0].AxisX.Interval = 1;
 chart_ser.ChartAreas[0].AxisX.IntervalOffset = 1;