如何手写代码以生成Composite图表?

前段写的博文介绍了用图表向导创建ColumnLineChart的整个过程，ColumnLineChart归属于简单图表，用类似的向导步骤可创建出复合图表，相关步骤可参考：Chart_Creating_a_Composite_Chart_Using_the_ Chart_Wizard

既然可通过向导全程定制Composite Chart,那么用书写代码的方式来生成Composite Chart也当然是可以的了！此过程，如果你英文也够好，你也可以参考如下内容：Chart_Creating_a_Composite_Chart_in Code_Part
但是如果你英文不够好，或者需要有人指导下，请看本部分内容，本文就是介绍用手写代码方式生成符合图表，其间属性设置根据我的理解做了注释，你要是还不明白，建议你尝试着修改修属性值，然后比照生成图表具体理解，具体实现代码如下，你只需要复制其在Page_load事件中添加，再拖一个UltraChart到该页面即可。
//定义数据源,根据其可方便设置series
DataTable dt = new DataTable();
dt.Columns.Add("col1", typeof(int));
dt.Columns.Add("col2", typeof(int));
dt.Columns.Add("col3", typeof(int));
dt.Columns.Add("col4", typeof(string));
dt.Rows.Add(new object[] {2, 14, 12, "H1"});
dt.Rows.Add(new Object[] {0, 11, 10, "H2"});
dt.Rows.Add(new Object[] {1, 9, 11, "H3"});
dt.Rows.Add(new Object[] {0, 10, 11, "H4"});
dt.Rows.Add(new Object[] {4, 12, 9, "H5"});
dt.Rows.Add(new Object[] {1, 11, 10, "H6"});
dt.Rows.Add(new Object[] {1, 8, 7, "H7"});
dt.Rows.Add(new Object[] {5, 10, 10, "H8"});

//以下开始介绍生成Composite的完整步骤

//第一步:设置UltraChart1图表为组合图表Composite
this.UltraChart1.ChartType = ChartType.Composite;

//第二步:创建一个图表区域ChartArea,并在UltraChart1图表组合中增加一个图表区域
ChartArea area = new ChartArea();
this.UltraChart1.CompositeChart.ChartAreas.Add(area);

//第三步：创建X轴,X2轴和Y轴,并添加到图表区域
//创建X轴,Composite的ColumnChart需要
AxisItem xAxisColumn = new AxisItem();
xAxisColumn.OrientationType = AxisNumber.X_Axis;
xAxisColumn.DataType = AxisDataType.String ;
xAxisColumn.SetLabelAxisType = Infragistics.UltraChart.Core.Layers.SetLabelAxisType.GroupBySeries;
xAxisColumn.Labels.ItemFormat = AxisItemLabelFormat.ItemLabel;
xAxisColumn.Extent = 20;
//创建Y轴,Composite的ColumnChart和LineChart都需要
AxisItem yAxis = new AxisItem();
yAxis.OrientationType = AxisNumber.Y_Axis;
yAxis.DataType = AxisDataType.Numeric ;
yAxis.Labels.ItemFormat = AxisItemLabelFormat.DataValue;
yAxis.RangeType = AxisRangeType.Custom;
yAxis.RangeMin = 0;
yAxis.RangeMax = 20;
yAxis.Extent = 20;
//创建X2轴, Composite的LineChart需要
AxisItem xAxisLine = new AxisItem();
xAxisLine.OrientationType = AxisNumber.X2_Axis;
xAxisLine.DataType = AxisDataType.String ;
xAxisLine.SetLabelAxisType = Infragistics.UltraChart.Core.Layers.SetLabelAxisType.ContinuousData;
xAxisLine.Labels.ItemFormat = AxisItemLabelFormat.ItemLabel;
xAxisLine.Extent = 20;
//添加轴线到绘图区域
area.Axes.Add(xAxisColumn);
area.Axes.Add(xAxisLine);
area.Axes.Add(yAxis);

//第四步：创建若干曲线连续点实例，设置其取值
//生成ColumnChart所需的一个series
NumericSeries seriesColumn = new NumericSeries();
//数据标签值
seriesColumn.Label = "A";
seriesColumn.Data.DataSource = dt;
//轴线上显示的标签信息
seriesColumn.Data.LabelColumn = "col4";
//图表上要显示的值
seriesColumn.Data.ValueColumn = "col2";
seriesColumn.DataBind();
//生成ColumnChart所需的一个series
NumericSeries seriesColumn2 = new NumericSeries();
//数据标签值
seriesColumn2.Label = "B";
seriesColumn2.Data.DataSource = dt;
//轴线上显示的标签信息
seriesColumn2.Data.LabelColumn = "col4";
//图表上要显示的值
seriesColumn2.Data.ValueColumn = "col3";
seriesColumn2.DataBind();
//生成LineChart所需的一个series
NumericSeries seriesLine = new NumericSeries();
seriesLine.Data.DataSource = dt;
//轴线上显示的标签信息
seriesLine.Data.LabelColumn = "col4";
//图表上要显示的值
seriesLine.Data.ValueColumn = "col1";
seriesLine.DataBind();
this.UltraChart1.Series.Add(seriesLine);
this.UltraChart1.Series.Add(seriesColumn);
this.UltraChart1.Series.Add(seriesColumn2);

//第五步：创建图表样式(外观),并添加到图层集中
//ColumnChart的图表样式
ChartLayerAppearance ColumnLayer = new ChartLayerAppearance();
ColumnLayer.AxisX = xAxisColumn;
ColumnLayer.AxisY = yAxis;
ColumnLayer.ChartArea = area;
//设置图表类型,ColumnChart条形图
ColumnLayer.ChartType = ChartType.ColumnChart;
ColumnLayer.Series.Add(seriesColumn);
ColumnLayer.Series.Add(seriesColumn2);
//LineChart的图表样式
ChartLayerAppearance LineLayer = new ChartLayerAppearance();
LineLayer.AxisX = xAxisLine;
LineLayer.AxisY = yAxis;
LineLayer.ChartArea = area;
//设置图表类型,LineChart条形图
LineLayer.ChartType = ChartType.LineChart;
LineLayer.Series.Add(seriesLine);
this.UltraChart1.CompositeChart.ChartLayers.Add(ColumnLayer);
this.UltraChart1.CompositeChart.ChartLayers.Add(LineLayer);

根据上述代码所生成的Composite Chart如下图: