/// <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;
}