asp.net 显示柱状图 饼状图

先来个饼状图的多样化：http://www.cnblogs.com/wengjinbao/articles/743594.html

protected void Page_Load(object sender, EventArgs e)
    {

//        //连接数据库并获取特定字符串
        string strSeriesName = "图例1";
        string ConnectString = "Server=(local);DataBase=web;Uid=sa;Pwd=123";
        string Sql = "SELECT month,Allcount FROM Chart";
        SqlConnection myConn = new SqlConnection(ConnectString);
        myConn.Open();
        SqlDataAdapter Da = new SqlDataAdapter(Sql, myConn);
        DataSet ds = new DataSet();
        Da.Fill(ds);
      
        if (!Directory.Exists(Server.MapPath("Temp")))
        {
            Directory.CreateDirectory(Server.MapPath("Temp"));
        }
        string strAbsolutePath = Server.MapPath("Temp\\") + "test.gif";

        string[] strTemp = new string[12];
        int[] nTemp = new int[12];
        for (int i = 0; i < ds.Tables[0].Rows.Count; i++)
        {
            strTemp[i] = ds.Tables[0].Rows[i][0].ToString();
            nTemp[i] =Convert.ToInt32( ds.Tables[0].Rows[i][1].ToString());
        }
        CreateGif(strTemp, nTemp, PlaceHolder1,1, strAbsolutePath,strSeriesName);

    }

 protected void CreateGif(string[] strX, int[] nY, PlaceHolder SChart,int charttp, string strAbsolutePath, string strSeriesName)
    {
        //为x轴指定特定字符串，以便显示数据
        string strXdata = String.Empty;
        int nMax = 0;
        foreach (string strData in strX)
        {
            strXdata += strData + "\t";
        }
        strXdata = strXdata.Remove(strXdata.Length - 1, 1);
        //为y轴指定特定的字符串，以便与x轴相对应
        string strYdata = String.Empty;
        foreach (int nValue in nY)
        {
            if (nMax < nValue)
                nMax = nValue;
            strYdata = strYdata + nValue.ToString() + "\t";
        }
        strYdata = strYdata.Remove(strYdata.Length - 1, 1);
        //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);
        //指定绘制图表的类型。类型可以通过OWC.ChartChartTypeEnum枚举值得到
        if (charttp == 0)
        {
            InsertChart.Type = ChartChartTypeEnum.chChartTypeColumnClustered;//柱形图
        }
        else
        {
            InsertChart.Type = ChartChartTypeEnum.chChartTypePie;//饼图
        }
        //指定图表是否需要图例标注
        if (charttp == 0)
        {
            InsertChart.HasLegend = false; //指定图表是否需要图例标注
            InsertChart.HasTitle = true;//为图表添加标题
        }
        else
        {
            InsertChart.HasLegend = true;
            InsertChart.HasTitle = true;
        }
        //为图表添加标题
        if (charttp == 0)
        {
            InsertChart.Title.Caption = strSeriesName;//标题名称
        }
        else
        {
            InsertChart.Title.Caption = strSeriesName;
        }
        //为x,y轴添加图示说明
        if (charttp == 0)
        {
            InsertChart.Axes[0].HasTitle = true;
            InsertChart.Axes[0].Title.Caption = "月份";
            InsertChart.Axes[1].HasTitle = true;
            InsertChart.Axes[1].Scaling.Maximum = nMax + 10;
            InsertChart.Axes[1].Title.Caption = "数量";
        }

        //添加一个series系列
        InsertChart.SeriesCollection.Add(0);
        //给定series系列的名字
        if (charttp == 0)
        {
            InsertChart.SeriesCollection[0].SetData(ChartDimensionsEnum.chDimSeriesNames, +(int)ChartSpecialDataSourcesEnum.chDataLiteral, "评价");
        }
        else
        {
            InsertChart.SeriesCollection[0].SetData(ChartDimensionsEnum.chDimSeriesNames, +(int)ChartSpecialDataSourcesEnum.chDataLiteral, "评价");
        }
        //给定分类
        InsertChart.SeriesCollection[0].SetData(ChartDimensionsEnum.chDimCategories, +(int)ChartSpecialDataSourcesEnum.chDataLiteral, strXdata);
        //给定值
        InsertChart.SeriesCollection[0].SetData(ChartDimensionsEnum.chDimValues, (int)ChartSpecialDataSourcesEnum.chDataLiteral, strYdata);

        //输出文件.
        laySpace.ExportPicture(strAbsolutePath, "GIF", 500, 375);//图的大小

        //创建GIF文件的相对路径.
        string strRelativePath = "./Temp" + strAbsolutePath.Substring(strAbsolutePath.LastIndexOf('\\'));

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

<body>
    <form id="form1" runat="server">
    <div>
        <table style=" 600px">
            <tr>
                <td colspan="3" style="height: 20px">
                    <strong>怎么样在ASP.NET2.0中使用OWC组件画图</strong></td>
            </tr>
            <tr>
                <td colspan="3" style="height: 21px">
        <asp:PlaceHolder ID="PlaceHolder1" runat="server"></asp:PlaceHolder>
                </td>
            </tr>
            </table>

    </div>
    </form>
</body>