?? pie.aspx.cs
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/*
C#發現之旅系列教程配套演示代碼
本代碼僅供學習和參考使用
編制 袁永福 2008-5-15
MSN yyf9989@hotmail.com
QQ 28348092
作者博客 http://xdesigner.cnblogs.com/
使用者請作者的尊重知識產權。
*/
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 System.Data.OleDb ;
namespace cs_discovery
{
/// <summary>
/// pie_customers 的摘要說明。
/// </summary>
public class pie_customers : System.Web.UI.Page
{
protected System.Web.UI.WebControls.Label lblResult;
protected System.Web.UI.WebControls.DataGrid DataGrid1;
private void Page_Load(object sender, System.EventArgs e)
{
// 連接數據庫
using( OleDbConnection conn = new OleDbConnection())
{
conn.ConnectionString = @"Provider=Microsoft.Jet.OLEDB.4.0;Data Source="
+ this.Server.MapPath("demomdb.mdb");
conn.Open();
// 查詢數據庫
using( OleDbCommand cmd = conn.CreateCommand())
{
cmd.CommandText = @"
select top 10
customers.customerid ,
customers.companyname as 客戶名稱,
( select sum( round( orderdetails.unitprice
* orderdetails.quantity
* ( 1.0 - orderdetails.discount) , 2 ) )
from orderdetails , orders
where orderdetails.orderid = orders.orderid
and orders.customerid = customers.customerid
) as 訂單總金額
from customers";
OleDbDataReader reader = cmd.ExecuteReader();
// 創建餅圖對象
PieShape pie = new PieShape();
pie.Width = 400 ;
pie.Height = 300 ;
System.IO.StringWriter writer = new System.IO.StringWriter();
while( reader.Read())
{
string id = Convert.ToString( reader.GetValue( 0 ));
double Value = Convert.ToDouble( reader.GetValue( 2 ));
string Text = "客戶名稱:" + Convert.ToString( reader.GetValue( 1 ))
+ "\r\n訂單金額:" + Convert.ToString( reader.GetValue( 2 ))
+ "\r\n點擊察看該客戶訂單的詳細情況" ;
string Link = "pie_orders.aspx?customerid=" + id ;
pie.Add( Value , Text , Link );
}//while
reader.Close();
pie.RefreshState();
this.Session["pie_customers"] = pie ;
this.lblResult.Text = pie.GetHtmlString("pieimage.aspx?name=pie_customers");
this.DataGrid1.DataSource = pie ;
this.DataGrid1.DataBind();
}
}
}
#region Web 窗體設計器生成的代碼
override protected void OnInit(EventArgs e)
{
//
// CODEGEN: 該調用是 ASP.NET Web 窗體設計器所必需的。
//
InitializeComponent();
base.OnInit(e);
}
/// <summary>
/// 設計器支持所需的方法 - 不要使用代碼編輯器修改
/// 此方法的內容。
/// </summary>
private void InitializeComponent()
{
this.Load += new System.EventHandler(this.Page_Load);
}
#endregion
}
}
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