ComponentOne之WebChart用法

(一). 写本文章目的:    

    学了一段时间ComponentOne的图表，感觉ComponenOne图表控件还可以，图表样式也较丰富

  不过它的帮助全是英文的，而且有些地方写的比较粗糙，示例程序也不够详细. 我把它总结了一下.

（二）.使用方法        

      1.安装好ComponentOne软件.

         2.建立一个WEB应用程序项目，名称为: TextChart

         3.将ComponentOne软件自带的控件集DLL文件(不一定全部，只把需要的一部分)拷贝到自己刚建的

            项目TextChart的Bin目录下面 (这里要手动放的原因是ComponentOne有时会找不到Dll)  

         4.双击项目里任何一个*.aspx文件，打开设计界面。 打开工具栏，在工具栏空白处右击，选“添加/删除”项,打开自定义控件窗口，在.net frame 组件选项卡下选择ComponentOne相应的组件，如果不清楚，就将所有的C1开头的全部勾选，点“确定按钮".  则ComponentOne的控件就显示在工具箱里面了  

         5. 到了这一步，就可以将ComponentOne控件像一般控件一样直接拖动使用了. 拖C1WebChart控件到窗体页面上.  然后右击控件，选 "Chart wizard..."就可以为其设置显示的样式(饼图/柱状图/折线图等)和属性了，用法跟一般控件差不多。(如果感觉还是陌生的话，请看下面（三）,除了用设计器设置外，还可以代码用代码设置)

(三) . 代码设置

         1. 限于篇幅，只讲解主要的属性

         2.所有的图表样式原理差不多都一样的，这里只讲一下饼图的实现方法

          using C1.Web.C1WebChart;            //命名空间，必需加入,否则找不到里面的类和方法等
          using C1.Web.C1WebChartBase;
              using C1.Win.C1Chart;

              protected C1.Web.C1WebChart.C1WebChart C1WebChart1;   // 控件声明

         1)  <summary>主要属性</summary>

               C1WebChart1.Header.Text="Chart 头";               //图表头标题
          C1WebChart1.Footer.Text="Chart 尾";                 //图表尾文本
          C1WebChart1.BackColor = Color.LightSteelBlue;   //背景色
          C1WebChart1.ImageFormat = System.Drawing.Imaging.ImageFormat.Png;  //图像存储格式          

          C1WebChart1.ChartGroups.Group0.ChartType = Chart2DTypeEnum.Bar;   //表类型,Chart2DTypeEnum枚举下有所有的图表样式，如饼图/柱状图等
                                                                                                                      
           C1WebChart1.Width=800;     //图表宽度

          2) <summary>主要方法</summary>

            a .X轴标签(坐标)的方法，直接调用即可

               public void AddAxisX()
               {  
                       // label x axis with product names
                      Axis ax = C1WebChart1.ChartArea.AxisX;
                      ax.ValueLabels.Clear();  
                     ax.AnnoMethod = AnnotationMethodEnum.ValueLabels;
                     for(int i = 0; i < 100; i++)
                     {
                             ax.ValueLabels.Add(i, (i+1).ToString());
                     }
                     try
                     {
                             ax.Max = 10 - .5;
                     }
                    catch {}  
                }

            b .Y轴标签(坐标)的方法，直接调用即可

                public void AddAxisY()
                {  
                      // label y axis with product names
                     Axis ay = C1WebChart1.ChartArea.AxisY;
                    ay.ValueLabels.Clear();  
                   ay.AnnoMethod = AnnotationMethodEnum.ValueLabels;
                    for(int i = 0; i < 10; i++)
                    {
                            ay.ValueLabels.Add(i, (50*i).ToString());
                   }
                   try
                    {
                            ay.Max = 20 - .5;
                    }
                   catch {}  
                }

              c.画图表的方法
                public void GetPieData()
                {  
                       C1WebChart1.Legend.Visible = true;  //图表区块注释.
                       this.AddAxisX();   //上面方法a
                       this.AddAxisY();   //上面方法b
  
                       //生成数据
                        PointF[] data = new PointF[10];
                        for (int i = 0; i < data.Length; i++)
                        {
                                float y = float.Parse((3*i+5).ToString());
                                data = new PointF(i, y);
                        }    
  
                        //清除现有的饼图
               ChartDataSeriesCollection dscoll = C1WebChart2.ChartGroups[0].ChartData.SeriesList;  
                       dscoll.Clear();

                       //绘图,即将点数组交给控件，它会自己分配,并画出图形
               ChartDataSeries series = C1WebChart1.ChartGroups[0].ChartData.SeriesList[0];
                       series.PointData.CopyDataIn(data);// 这里的data是PointF类型  
            
                        //给区块加标签
                        for(int i=0; i < data.Length; i++)
                       {
                               ChartDataSeries series = dscoll.AddNewSeries();
                               series.PointData.Length = 1;
                               series.Y[0] = data.Y;
                              series.Label="我是:"+(i+1).ToString();

                               //加标签
                     C1.Win.C1Chart.Label lbl = C1WebChart1.ChartLabels.LabelsCollection.AddNewLabel();
                               lbl.Text = string.Format("{0} ({1:c})","第:"+i.ToString()+"扇区", data.Y);
                               lbl.Compass = LabelCompassEnum.Radial;
                               lbl.Offset = 20;
                               lbl.Connected = true;
                               lbl.Visible = true;
                               lbl.AttachMethod = AttachMethodEnum.DataIndex;
                               AttachMethodData am = lbl.AttachMethodData;
                              am.GroupIndex  = 0;
                             am.SeriesIndex = i;
                             am.PointIndex  = 0;
                         }
                  }  

finished.