1using System;
 2using System.Collections;
 3using System.ComponentModel;
 4using System.Data;
 5using System.Drawing;
 6using System.Web;
 7using System.Web.SessionState;
 8using System.Web.UI;
 9using System.Web.UI.WebControls;
10using System.Web.UI.HtmlControls;
11
12using MyBookShop.BusinessLogicLayer;
13
14namespace MyBookShop.Web
15...{
16    /**//// <summary>
17    /// BookStatistics 的摘要说明。
18    /// </summary>
19    public partial class BookStatistics : System.Web.UI.Page
20    ...{
21    
22        protected void Page_Load(object sender, System.EventArgs e)
23        ...{
24            if(!IsPostBack)
25                DrawChartByCategory();
26        }
27
28        /**//// <summary>
29        /// 按照图书类别统计
30        /// </summary>
31        private void DrawChartByCategory()
32        ...{
33            DataTable dt=Book.GetSaleCountByCategory();
34            string title="图书销售量统计";            //标题
35            string subTitle="基于图书种类";            //副标题
36            string targetFile = Server.MapPath(".\\Images\\") + "Category.gif";    //图象文件
37            Chart.DrawPie(title,subTitle,300,300,dt,targetFile,"CategoryName","SaleCount");
38
39            Image.ImageUrl=targetFile;
40        }
41        /**//// <summary>
42        /// 按照出版社统计
43        /// </summary>
44        //该源码下载自www.51aspx.com(５１-ａｓｐｘ．ｃｏｍ)
45        private void DrawChartByPublisher()
46        ...{
47            DataTable dt=Book.GetSaleCountByPublisher();
48            string title="图书销售量统计";            //标题
49            string subTitle="基于出版社";            //副标题
50            string targetFile = Server.MapPath(".") + "\\Images\\Publiser.gif";    //图象文件
51  
52            Chart.DrawPie(title,subTitle,300,300,dt,targetFile,"Publisher","SaleCount");
53
54            Image.ImageUrl=targetFile;
55        }
56        /**//// <summary>
57        /// 按照价格类别统计
58        /// </summary>
59        private void DrawChartByPrice()
60        ...{
61            DataTable dt=Book.GetSaleCountByPrice();
62            string title="图书销售量统计";            //标题
63            string subTitle="基于图书价格";            //副标题
64
65            string targetFile = HttpContext.Current.Server.MapPath(".\\Images\\") + "Price.gif";    //图象文件
66            Chart.DrawPie(title,subTitle,300,300,dt,targetFile,"PriceGrade","SaleCount");
67
68            Image.ImageUrl=targetFile;
69        }
70        /**//// <summary>
71        /// 下拉框选择事件
72        /// </summary>
73        /// <param name="sender"></param>
74        /// <param name="e"></param>
75        protected void DropDownListType_SelectedIndexChanged(object sender, System.EventArgs e)
76        ...{
77            switch(DropDownListType.SelectedValue)
78            ...{
79                case "图书类别":
80                    DrawChartByCategory();
81                    break;
82                case "出版社":
83                    DrawChartByPublisher();
84                    break;
85                case "价格":
86                    DrawChartByPrice();
87                    break;
88
89            }
90        }
91    }
92}
93