OWC画图表的方法

/**/ ///   <summary>
     ///  生成图表
     ///   </summary>
     ///   <param name="strSeriesName"> 图表名称 </param>
     ///   <param name="strCategory"> 类型 </param>
     ///   <param name="strValue"> 值 </param>
     ///   <param name="Caption"> 图标标题 </param>
     ///   <param name="Type"> 类型 </param>
     ///   <param name="Longth"> 图片长 </param>
     ///   <param name="Width"> 图片宽 </param>
     public   string  GengerateChart( string  strSeriesName,  string  strCategory,  string  strValue,  string  Caption,  string  Type,  int  Longth,  int  Width)
    {
         string  chartSeriesName  =  strSeriesName;
         string  chartCategory  =  strCategory;
         string  chartValue  =  strValue;
         string  chartCaption  =  Caption;
         string  chartType  =  Type;
         int  chartLongth  =  Longth;
         int  chartWidth  =  Width;

         // 创建ChartSpace对象来放置图表
        ChartSpace laySpace  =   new  ChartSpaceClass();

         // 在ChartSpace对象中添加图表
        ChChart InsertChart  =  laySpace.Charts.Add( 0 );
         switch  (chartType)
        {
             case   " Pie " : // 饼状图
                {
                    InsertChart.Type  =  ChartChartTypeEnum.chChartTypePie;
                    InsertChart.HasLegend  =   true ;
                    InsertChart.HasTitle  =   true ; // 为图表添加标题
                    InsertChart.Title.Caption  =  chartCaption; // 标题名称
                    InsertChart.Title.Font.Color  =   " Blue " ;
                    InsertChart.Title.Font.Name  =   " 黑体 " ;
                     // 指定图表是否需要图例标注
                    InsertChart.HasLegend  =   true ;


                }
                 break ;

             case   " Line " : // 折线图
                {
                    InsertChart.Type  =  ChartChartTypeEnum.chChartTypeLine;
                     // 指定图表是否需要图例标注
                    InsertChart.HasLegend  =   true ;

                    InsertChart.HasTitle  =   true ; // 为图表添加标题
                    InsertChart.Title.Caption  =  chartCaption; // 标题名称
                    InsertChart.Title.Font.Color  =   " Blue " ;
                    InsertChart.Title.Font.Name  =   " 黑体 " ;
                }
                 break ;
             case   " BarClustered " : // 条形图
                {
                    InsertChart.Type  =  ChartChartTypeEnum.chChartTypeBarClustered;
                     // 指定图表是否需要图例标注
                    InsertChart.HasLegend  =   true ;

                    InsertChart.HasTitle  =   true ; // 为图表添加标题
                    InsertChart.Title.Caption  =  chartCaption; // 标题名称
                    InsertChart.Title.Font.Color  =   " Blue " ;
                    InsertChart.Title.Font.Name  =   " 黑体 " ;
                }
                 break ;
             case   " Area " : // 面积图
                {
                    InsertChart.Type  =  ChartChartTypeEnum.chChartTypeArea;
                     // 指定图表是否需要图例标注
                    InsertChart.HasLegend  =   true ;
                    InsertChart.HasTitle  =   true ; // 为图表添加标题
                    InsertChart.Title.Caption  =  chartCaption; // 标题名称
                    InsertChart.Title.Font.Color  =   " Blue " ;
                    InsertChart.Title.Font.Name  =   " 黑体 " ;
                }
                 break ;
        }

         // 添加一个series系列
        InsertChart.SeriesCollection.Add( 0 );

         // 给定series系列的名字
        InsertChart.SeriesCollection[ 0 ].SetData(ChartDimensionsEnum.chDimSeriesNames,  + ( int )ChartSpecialDataSourcesEnum.chDataLiteral, chartSeriesName);

         // 给定分类
        InsertChart.SeriesCollection[ 0 ].SetData(ChartDimensionsEnum.chDimCategories,  + ( int )ChartSpecialDataSourcesEnum.chDataLiteral, chartCategory);

         // 给定值
        InsertChart.SeriesCollection[ 0 ].SetData(ChartDimensionsEnum.chDimValues, ( int )ChartSpecialDataSourcesEnum.chDataLiteral, chartValue);

         if  (chartType  ==   " Pie " )
        {
             // 增加数据值标签
            InsertChart.SeriesCollection[ 0 ].DataLabelsCollection.Add();

            InsertChart.SeriesCollection[ 0 ].DataLabelsCollection[ 0 ].HasValue  =   true ;
            InsertChart.SeriesCollection[ 0 ].DataLabelsCollection[ 0 ].HasPercentage  =   true ;
        }

         // 输出文件.
         string  imageName  =  System.DateTime.Now.ToShortDateString().Replace( " - " ,  "" ).Trim()  +  System.DateTime.Now.ToLongTimeString().Replace( " : " ,  "" ).Trim();
        imageName  =  imageName  +  System.DateTime.Now.Millisecond  +   " Chart.gif " ;
         string  strAbsolutePath  =  (Server.MapPath( " . " ))  +   " \\ "   +  imageName;
        laySpace.ExportPicture(strAbsolutePath,  " GIF " , chartLongth, chartWidth);

         // 创建GIF文件的相对路径.
         string  strRelativePath  =   " ./ "   +  imageName;

         // 把图片添加到placeholder中，并在页面上显示
         string  strImageTag  =   " <IMG SRC=' "   +  strRelativePath  +   " '/> " ;
         // this.PlaceHolder1.Controls.Add(new LiteralControl(strImageTag));
         return  strRelativePath;


    }

轉自: http://www.cnblogs.com/ucetgg/archive/2008/04/24/1169847.html