asp.net高級圖文詳細教程(5)---實戰(zhàn)篇(中)
發(fā)表時間:2023-08-23 來源:明輝站整理相關(guān)軟件相關(guān)文章人氣:
[摘要]asp.net高級教程(五)---實戰(zhàn)篇(結(jié)合論壇用戶操作談asp.net表單驗證)(中) 做好準備工作,現(xiàn)在就要動真格的了,先讓我們看看用戶注冊的實現(xiàn)。前邊已經(jīng)講過,asp.net可以實現(xiàn)業(yè)務(wù)邏輯...
asp.net高級教程(五)---實戰(zhàn)篇(結(jié)合論壇用戶操作談asp.net表單驗證)(中)
做好準備工作,現(xiàn)在就要動真格的了,先讓我們看看用戶注冊的實現(xiàn)。前邊已經(jīng)講過,asp.net可以實現(xiàn)業(yè)務(wù)邏輯和html代碼分離,那么讓我們來看看到底是如何實現(xiàn)的,下面這個文件是用戶注冊的頁面部分,原型是根據(jù)我站點的風格制作的:
<%@Page language="c#" Codebehind="Register.cs" AutoEventWireup="false" Inherits="bbs.Register" %>
<%@Register Tagprefix="My" Namespace="bbs.uctrl"%>
<html><head>
<TITLE>新用戶注冊</TITLE>
<meta name=vs_targetSchema content="HTML 4.0">
<link rel="stylesheet" href="images/style.css">
<META http-equiv=Content-Type content="text/html; charset=gb2312">
<meta name="GENERATOR" Content="Microsoft Visual Studio 7.0">
<meta name="CODE_LANGUAGE" Content="C#"></head>
<script language=javascript>
function OnPreview()
{
divPreview.innerHTML = Form1.txtSignature.value ;
}
</script>
<body>
<form method="post" runat="server" ID=Form1>
<My:MyHead id="myHead1" runat="server"></MY:MYHEAD>
<!----------------------外面表格形成邊框-------------------------------------->
<table width='722' border='0' cellspacing=0
cellpadding='0' align='center'>
<TBODY>
<tr>
<!-------------------左邊豎線---------------------------------------------->
<td bgcolor='#0097c0' width='1'>
<img src='http://edu.chinaz.com/Get/Program/Net/images/Shim.gif' width=1>
</td>
<td width=720 align=middle><br><br><br>
<!-------------------左邊豎線---------------------------------------------->
<!--------------新用戶注冊開始---------------------------------------------->
<table width=600 align=center border=0 cellpadding=4 cellspacing=1
id="tblRegister" class=cn bgcolor=#000000 runat=server>
<TBODY>
<tr bgcolor=#ffffff>
<td colspan=3>
<p align=center>新用戶注冊</p>
</td>
</tr>
<!--------------用戶名開始-------------------------------------------------------->
<tr bgcolor=#ffffff>
<td width=60>
用戶名
</td>
<td width=300>
<asp:TextBox id="txtUserName" maxlength=20 columns=20 runat="server"></asp:TextBox>
<font color=red>*</font>
</td>
<td width=240>
用戶筆名,4-20字符
<asp:requiredfieldvalidator id="reqUserName" display=Dynamic
controltovalidate="txtUserName" runat=Server>
不能為空!
</asp:requiredfieldvalidator>
<asp:regularexpressionvalidator id="regUserName" display=Dynamic
controltovalidate="txtUserName" runat=Server validationexpression="[^']{4,20}">
用戶名非法!
</asp:regularexpressionvalidator>
<asp:customvalidator id="cusUserName" controltovalidate="txtUserName"
onservervalidate="ValidUser" display=Dynamic runat=Server>
該用戶已存在。
</asp:customvalidator>
</td>
</tr>
<!--------------用戶名結(jié)束-------------------------------------------------------->
<!--------------用戶密碼開始-------------------------------------------------------->
<tr bgcolor=#ffffff>
<td width=60>
密碼
</td>
<td width=300>
<asp:TextBox id="txtPassword" maxlength=10 columns=10
textmode=Password runat=server></asp:TextBox>
<font color=red>*</font>
</td>
<td width=240>
用戶密碼,4-10字符
<asp:requiredfieldvalidator id=Requiredfieldvalidator1 display=Dynamic
controltovalidate="txtPassword" runat=Server>
不能為空!
</asp:requiredfieldvalidator>
<asp:regularexpressionvalidator id=Regularexpressionvalidator1 display=Dynamic
controltovalidate="txtPassword" runat=Server validationexpression="[^']{4,10}">
密碼非法!
</asp:regularexpressionvalidator>
</td>
</tr>
<!--------------用戶密碼結(jié)束-------------------------------------------------------->
<!--------------驗證密碼開始-------------------------------------------------------->
<tr bgcolor=#ffffff>
<td width=60>
驗證密碼
</td>
<td width=300>
<asp:TextBox id=txtPassword1 maxlength=10 columns=10
textmode=Password runat=server></asp:TextBox>
<font color=red>*</font>
</td>
<td width=240>
再次輸入密碼。
<asp:comparevalidator id="comPassword" display=Dynamic
controltocompare="txtPassword" controltovalidate="txtPassword1" runat=Server>
兩次錄入的密碼不同!
</asp:comparevalidator>
</td>
</tr>
<!--------------驗證密碼結(jié)束-------------------------------------------------------->
<!--------------email開始-------------------------------------------------------->
<tr bgcolor=#ffffff>
<td width=60>
Email
</td>
<td width=300>
<asp:TextBox id="txtEmail" maxlength=100 columns=30 runat=server></asp:TextBox>
</td>
<td width=240>
您的電子郵件地址,您可以不填,但請不要胡填。
<asp:regularexpressionvalidator id="regEmail" display=Dynamic
controltovalidate="txtEmail" validationexpression="[^']*" runat=Server>
非法字符
</asp:regularexpressionvalidator>
</td>
</tr>
<!--------------email結(jié)束-------------------------------------------------------->
<!--------------個人主頁開始-------------------------------------------------------->
<tr bgcolor=#ffffff>
<td width=60>
個人主頁
</td>
<td width=300>
<asp:TextBox id="txtHomepage" maxlength=150 columns=30 runat=server></asp:TextBox>
</td>
<td width=240>
您的主頁,您可以不填,但請不要胡填。
<asp:regularexpressionvalidator id="regHomepage" display=Dynamic
controltovalidate="txtHomepage" validationexpression="[^']*" runat=Server>
非法字符。
</asp:regularexpressionvalidator>
</td>
</tr>
<!--------------個人主頁結(jié)束-------------------------------------------------------->
<!--------------簽名開始-------------------------------------------------------->
<tr bgcolor=#ffffff>
<td width=60>
簽名
</td>
<td width=300>
<asp:TextBox id="txtSignature" maxlength=150 columns=30 rows=6 textmode=MultiLine runat=server></asp:TextBox>
</td>
<td width=240 valign=top>
<div id="divPreview">
你可以制作自己的簽名,不超過255個字符,不能用script。<br><br>
</div><br>
<input type=button id="btnPreview" value="預(yù)覽" onclick="OnPreview()"><br>
<asp:regularexpressionvalidator id=Regularexpressionvalidator2 display=Dynamic
controltovalidate="txtSignature" validationexpression="[^']{0,255}" runat=Server>
使用非法字符或超過255個字符。
</asp:regularexpressionvalidator>
</td>
</tr>
<!--------------簽名結(jié)束-------------------------------------------------------->
<tr bgcolor=#ffffff>
<td colspan=3 align=center>
<asp:button id="btnSubmit" text="確認" onclick="OnSubmit" runat=Server></asp:button>
</td>
</tr>
</table><br><br><br>
<!----------------------------------新用戶注冊結(jié)束---------------------->
<!-------------------右邊豎線---------------------------------------------->
<td bgcolor='#0097c0' width='1'>
<img src='http://edu.chinaz.com/Get/Program/Net/images/Shim.gif' width=1>
</td>
<!-------------------右邊豎線---------------------------------------------->
</tr>
<!-------------------下邊橫線---------------------------------------------->
<tr>
<td colspan=3 height=1 bgcolor=#0097c0><img src='http://edu.chinaz.com/Get/Program/Net/images/Shim.gif'width=1 height=1></td>
</tr>
<!-------------------下邊橫線---------------------------------------------->
</table>
<My:bottom id="myBottom" runat="server"></My:bottom>
</form>
</BODY></HTML>
<!--------------------文件結(jié)束--------------------------------->
怎么樣,看上去很熟悉吧,除了頁首兩句及下面webform中帶runat=server的webcontrol,是不是和普通的html一樣?注意到頁首第一句中的Codebehind="Register.cs"嗎,它指定本頁后面的代碼文件是register.cs,這是asp.net提供的一種機制,它可以將業(yè)務(wù)邏輯隱藏在與.aspx同名的cs文件中,而運行時先把這個cs文件編譯,這樣不但可以提高運行效率,也使代碼隱藏起來,避免了asp中由于系統(tǒng)漏洞而造成源碼泄漏所造成的問題。那么,這個包含業(yè)務(wù)邏輯的代碼文件是怎樣的呢?下面是這個文件:
namespace bbs
{
using System;
using System.Collections;
using System.ComponentModel;
using System.Data.SQL;
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 bbs.uctrl ;
//using bbs.MyClass ;
using MyOwnClass ;
/// <summary>
/// Summary description for Register.
/// </summary>
public class Register : System.Web.UI.Page
{
protected System.Web.UI.WebControls.Button btnSubmit;
protected System.Web.UI.WebControls.TextBox txtHomepage;
protected System.Web.UI.WebControls.TextBox txtEmail;
protected System.Web.UI.WebControls.CompareValidator comPassword;
protected System.Web.UI.WebControls.TextBox txtPassword1;
protected System.Web.UI.WebControls.RegularExpressionValidator Regularexpressionvalidator1;
protected System.Web.UI.WebControls.RequiredFieldValidator Requiredfieldvalidator1;
protected System.Web.UI.WebControls.TextBox txtPassword;
protected System.Web.UI.WebControls.CustomValidator cusUserName;
protected System.Web.UI.WebControls.RegularExpressionValidator regUserName;
protected System.Web.UI.WebControls.RequiredFieldValidator reqUserName;
protected System.Web.UI.WebControls.Label lblMessage;
protected System.Web.UI.WebControls.TextBox txtUserName;
public MyHead myHead1 ;
//構(gòu)造函數(shù)
public Register()
{
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();
this.myHead1.Position = 2 ;
}
/// <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);
}
//監(jiān)測用戶是否存在
public bool ValidUser(Object sender , string value)
{
BBSUser myUser = new BBSUser() ;
bool bExists ;
try
{
bExists = myUser.GetUser(this.txtUserName.Text) ;
}
catch(Exception e) //如果出現(xiàn)異常
{
#if DEBUG
Response.Write (e.Message) ;
return false ;
#endif
Server.Transfer("error.aspx") ;
}
return !bExists ;
}
//提交按鈕點擊
public void OnSubmit(Object sender , EventArgs e)
{
if (Page.IsValid)
{
//數(shù)據(jù)入庫
try
{
BBSUser myUser = new BBSUser() ;
if(!myUser.GetUser(txtUserName.Text))
{
myUser.CreateUser(BBSUser.CreateType.Create , txtUserName.Text , txtPassword.Text ,
txtEmail.Text , txtHomepage.Text , "") ;
}
}
catch(Exception exp)
{
#if DEBUG
Response.Write ("出現(xiàn)異常:" + exp.Message) ;
return ;
#endif//DEBUG
Server.Transfer("error.aspx") ;
}
}
}
}
}
什么?還是看著眼熟?沒錯,是不是和前邊我定義的那個類差不多?是,本來asp.net就是把這個頁當作一個對象,注意類定義的那行代碼:public class Register : System.Web.UI.Page , 前面你可以理解,是定義一個Register對象,那:號后面的System.Web.UI.Page是什么意思呢?它說明這個Regsiter類是System.Web.UI.Page類的派生類(子類),也就是說Register類除了自己成員變量、屬性、方法外,還繼承System.Web.UI.Page類的所有公共(public)或保護(protected)成員變量、屬性和方法。明白了這些,你可以安心坐下來研究代碼了,做好下面關(guān)于表單驗證內(nèi)容的學習準備。