bookstatistics.aspx.cs

c# 李子全集 初学者的法宝 文档全集

using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;

using MyBookShop.BusinessLogicLayer;

namespace MyBookShop.Web
{
	/// <summary>
	/// BookStatistics 的摘要说明。
	/// </summary>
	public partial class BookStatistics : System.Web.UI.Page
	{
	
		protected void Page_Load(object sender, System.EventArgs e)
		{
			if(!IsPostBack)
				DrawChartByCategory();
		}

		#region Web 窗体设计器生成的代码
		override protected void OnInit(EventArgs e)
		{
			//
			// CODEGEN: 该调用是 ASP.NET Web 窗体设计器所必需的。
			//
			InitializeComponent();
			base.OnInit(e);
		}
		
		/// <summary>
		/// 设计器支持所需的方法 - 不要使用代码编辑器修改
		/// 此方法的内容。
		/// </summary>
		private void InitializeComponent()
		{    

		}
		#endregion

		/// <summary>
		/// 按照图书类别统计
		/// </summary>
		private void DrawChartByCategory()
		{
			DataTable dt=Book.GetSaleCountByCategory();
			string title="图书销售量统计";			//标题
			string subTitle="基于图书种类";			//副标题
            string targetFile = Server.MapPath(".\\BookPics\\") + "Category.gif";	//图象文件
			Chart.DrawPie(title,subTitle,300,300,dt,targetFile,"CategoryName","SaleCount");

            Image.ImageUrl=System.Web.HttpUtility.HtmlDecode(targetFile);
			//Image.ImageUrl=Server.UrlDecode(targetFile);
            //Image.ImageUrl = Server.UrlEncode(targetFile);
            //Image.ImageUrl = Server.UrlPathEncode(targetFile);
		}
		/// <summary>
		/// 按照出版社统计
		/// </summary>
		private void DrawChartByPublisher()
		{
			DataTable dt=Book.GetSaleCountByPublisher();
			string title="图书销售量统计";			//标题
			string subTitle="基于出版社";			//副标题
			string targetFile=Server.MapPath(".")+"\\BookPics\\Publiser.gif";	//图象文件
            //string targetFile = "D:\\asptest\\Publiser.gif";	//图象文件    
			Chart.DrawPie(title,subTitle,300,300,dt,targetFile,"Publisher","SaleCount");

			Image.ImageUrl=targetFile;
		}
		/// <summary>
		/// 按照价格类别统计
		/// </summary>
		private void DrawChartByPrice()
		{
			DataTable dt=Book.GetSaleCountByPrice();
			string title="图书销售量统计";			//标题
			string subTitle="基于图书价格";			//副标题
            //string targetFile = Server.MapPath(".\\BookPics\\") + "Price.gif";	//图象文件
            string targetFile= HttpContext.Current.Server.MapPath(".\\BookPics\\") + "Price.gif";	//图象文件
			Chart.DrawPie(title,subTitle,300,300,dt,targetFile,"PriceGrade","SaleCount");

			Image.ImageUrl=targetFile;
		}
		/// <summary>
		/// 下拉框选择事件
		/// </summary>
		/// <param name="sender"></param>
		/// <param name="e"></param>
		protected void DropDownListType_SelectedIndexChanged(object sender, System.EventArgs e)
		{
			switch(DropDownListType.SelectedValue)
			{
				case "图书类别":
					DrawChartByCategory();
					break;
				case "出版社":
					DrawChartByPublisher();
					break;
				case "价格":
					DrawChartByPrice();
					break;

			}
		}
	}
}