ASP.NET 2.0中OWC生成柱状图和饼状图的源代码

1、首先下载owc11：owc11

2、引用OWC：打开"解决方案资源管理器"面板，鼠标右键单击"引用"，选择"添加引用"菜单，在弹出的"添加引用"对话框中单击"COM"卡片，找到"Microsoft Office Web Components 10.0(office 2003是11.0)"，单击"选择"和"确定"按钮，OWC就被添加到了引用中。

3、建立一个pic.aspx文件，aspx代码如下：

<script language="javascript" type="text/javascript" src="/js/Calendar30.js"></script>
选择开始日期和结束日期。如果时间范围超过365则显示年表，如果时间范围超过30则显示月份表，如果超过1则显示日期表，否则显示小时表。<br />
开始日期：<input id="s" type="text" value="<%= Request.QueryString["s"]%>" onclick="fillDay(this)" >结束日期：<input id="e" value="<%= Request.QueryString["e"]%>" type="text" onclick="fillDay(this)" /><input type="button" value="查看" onclick="location.href='?s='+$F('s')+'&e='+$F('e')" /><br />
<asp:placeholder id="ChartHolder" runat="server"></asp:placeholder>

后台代码：

using System;

using System.Data;

using System.Configuration;

using System.Collections;

using System.Web;

using System.Web.Security;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Web.UI.WebControls.WebParts;

using System.Web.UI.HtmlControls;

using Microsoft.Office.Interop.Owc11;

public partial class pic : System.Web.UI.Page

{

    protected void Page_Load(object sender, EventArgs e)

    {

        if (!IsPostBack && Request.QueryString["s"] != null && Request.QueryString["e"] != null)

        {

            string file;

            DateTime s = DateTime.Parse(Request.QueryString["s"]);

            DateTime et = DateTime.Parse(Request.QueryString["e"]);

            string x = "";

            string y = "";

            string danwei = "时";

            string sql = "";

            int r = ((TimeSpan)(et - s)).Days;

            //Response.Write(r);

            //Response.Write("<br />");

            if (r >= 365)

            {

                sql = "select datepart(yyyy,regtime) d,count(*) c from t_user where regtime between '{0}' and '{1}' group by datepart(yyyy,regtime) order by d";

                danwei = "年";

            }

            else if (r >= 30)

            {

                sql = "select datepart(mm,regtime) d,count(*) c from t_user where regtime between '{0}' and '{1}' group by datepart(mm,regtime) order by d";

                danwei = "月";

            }

            else if (r >= 1)

            {

                sql = "select datepart(dd,regtime) d,count(*) c from t_user where regtime between '{0}' and '{1}' group by datepart(dd,regtime) order by d";

                danwei = "日";

            }

            else

                sql = "select datepart(HH,regtime) d,count(*) c from t_user where regtime between '{0}' and '{1}' group by datepart(HH,regtime) order by d";

            DateTime s1 = new DateTime(s.Year, s.Month, s.Day);

            DateTime e1 = new DateTime(et.Year, et.Month, et.Day, 23, 59, 59);

            sql = string.Format(sql, s1.ToString(), e1.ToString());

            //Response.Write(sql);

            //return;

            DataSet ds = DAL.dbHelper.ExecuteDataset(sql);

            if (ds != null && ds.Tables.Count > 0 && ds.Tables[0].Rows.Count > 0)

            {

                x = ds.Tables[0].Rows[0][0].ToString();

                y = ds.Tables[0].Rows[0][1].ToString();

                for (int i = 1; i < ds.Tables[0].Rows.Count; i++)

                {

                    x += '/t' + ds.Tables[0].Rows[i][0].ToString();

                    y += '/t' + ds.Tables[0].Rows[i][1].ToString();

                }

                //创建ChartSpace对象来放置图表

                ChartSpace objCSpace = new ChartSpaceClass();

                //在ChartSpace对象中添加图表，Add方法返回chart对象

                ChChart objChart = objCSpace.Charts.Add(0);

                //指定图表的类型。类型由ChartChartTypeEnum枚举值得到

                objChart.Type = ChartChartTypeEnum.chChartTypeColumnClustered;

                //指定图表是否需要图例

                objChart.HasLegend = true;

                //给定标题

                objChart.HasTitle = true;

                objChart.Title.Caption = "注册用户/日期分布图";

                //给定x,y轴的图示说明

                objChart.Axes[0].HasTitle = true;

                objChart.Axes[0].Title.Caption = "X ： 日期/单位： " + danwei;

                objChart.Axes[1].HasTitle = true;

                objChart.Axes[1].Title.Caption = "Y ： 数量";

                //计算数据

                /*categories 和 values 可以用tab分割的字符串来表示*/

                //string strSeriesName = "图例 1";

                //添加一个series

                objChart.SeriesCollection.Add(0);

                //给定series的名字

                //objChart.SeriesCollection[0].SetData(ChartDimensionsEnum.chDimSeriesNames, +(int)ChartSpecialDataSourcesEnum.chDataLiteral, strSeriesName);

                //给定分类

                objChart.SeriesCollection[0].SetData(ChartDimensionsEnum.chDimCategories,

                +(int)ChartSpecialDataSourcesEnum.chDataLiteral, x);

                //给定值

                objChart.SeriesCollection[0].SetData

                  (ChartDimensionsEnum.chDimValues,

                  (int)ChartSpecialDataSourcesEnum.chDataLiteral, y);

                //输出成GIF文件.

                file = "/tmp/" + Guid.NewGuid().ToString() + ".gif";

                objCSpace.ExportPicture(Server.MapPath("~" + file), "GIF", 800, 400);

            }

            else

            {

                file = "/images/0.gif";

            }

            //把图片添加到placeholder.

            string strImageTag = "<IMG SRC='" + file + "'/>";

            ChartHolder.Controls.Add(new LiteralControl(strImageTag));

        }

    }

}

效果图：