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