bookstatistics.aspx.cs

网上书店

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();
		}

		/// <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(".\\Images\\") + "Category.gif";	//图象文件
			Chart.DrawPie(title,subTitle,300,300,dt,targetFile,"CategoryName","SaleCount");

           
		}
		/// <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(".") + "\\Images\\Publiser.gif";	//图象文件
  
			Chart.DrawPie(title,subTitle,300,300,dt,targetFile,"Publisher","SaleCount");

		
		}
		/// <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 = HttpContext.Current.Server.MapPath(".\\Images\\") + "Price.gif";	//图象文件
			Chart.DrawPie(title,subTitle,300,300,dt,targetFile,"PriceGrade","SaleCount");

	
		}
		/// <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;

			}
		}
       
}
}