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好了，现在万事俱备，只欠东风了，让我们看看现在做一个舆论调查多么简单： file : vote.aspx
<%@ Page language="c#" Codebehind="vote.cs" AutoEventWireup="false" Inherits="Football.vote" %>
<html>
<head>
<title>532.com.cn --- 舆论调查 ---</title>
<link rel="stylesheet" href="style/style.css" type="text/css">
</head>
<body>
<form method="post" runat="server">
<table width=400 height=300 align=center>
<tr>
<td class=cn valign=top align=center><b>调查题目：
<asp:label id="lblSurveyTitle" runat=Server class=cn></asp:label>
</td>
</tr>
<tr>
<td alin=center>
<asp:image id="imgSurvey" runat=Server></asp:image>
</td>
</tr>
<tr>
<td align=center>
<input type=button onclick="window.close();" value="关闭此窗口">
</td>
</tr>
</table>
</form>
</body>
</html> file: vote.cs
namespace Football
{
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; /// <summary>
/// Summary description for vote.
/// </summary>
public class vote : System.Web.UI.Page
{
protected System.Web.UI.WebControls.Image imgSurvey;
protected System.Web.UI.WebControls.Label lblSurveyTitle; private string m_strSurveyID ;
private int m_intVoteID ;
public vote()
{
Page.Init += new System.EventHandler(Page_Init);
} protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
//
// Evals true first time browser hits the page
//
}
} protected void Page_Init(object sender, EventArgs e)
{
//
// CODEGEN: This call is required by the ASP+ Windows Form Designer.
//
InitializeComponent();
Init() ;
} /// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent()
{
this.Load += new System.EventHandler (this.Page_Load);
} private void Init()
{
m_strSurveyID = Request["surveyid"].ToString() ;
FootballSurvey mySurvey = new FootballSurvey() ; try
{
m_intVoteID = Request["vote"].ToInt32() ;
mySurvey.LoadFromDatabase(m_strSurveyID) ;
lblSurveyTitle.Text = mySurvey.Title ;
if (m_intVoteID < mySurvey.Items.Count)
{
mySurvey.Vote(m_intVoteID) ;
} mySurvey.CreateResultImage(Server.MapPath("survey.jpg") ,
MyClass.Util.MyChart.ChartType.Pie ,
300 ,300 , Color.White) ;
imgSurvey.ImageUrl = "survey.jpg" ;
}
catch(Exception e)
{
#if DEBUG
Response.Write ("初始化页面错误：" + e.ToString()) ;
return ;
#endif
Page.Navigate("error.aspx") ;
} }
}
} 要看这个调查的效果，请到http://210.12.102.95/football 。怎么样，是不是觉得这种编程思路不错呢？什么？还不如直接在aspx文件里面做？不错，如果单做这么一个调查的确直接做要省事的多，但你知不知道，只要有编译好的这个类的dll，不管你怎么改页面，改数据结构，你都可以在15分钟内把你所需要的舆论调查做出来？这就是这两种编程方法最大的区别。希望通过这个例子你能学到一些编程思想把。
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