<form id="hz9zz"></form>
  • <form id="hz9zz"></form>

      <nobr id="hz9zz"></nobr>

      <form id="hz9zz"></form>

    1. 明輝手游網中心:是一個免費提供流行視頻軟件教程、在線學習分享的學習平臺!

      asp.net高級圖文詳細教程(5)-實戰篇(中)

      [摘要]asp.net高級教程(五)---實戰篇(結合論壇用戶操作談asp.net表單驗證)(中) 做好準備工作,現在就要動真格的了,先讓我們看看用戶注冊的實現。前邊已經講過,asp.net可以實現業務...
      asp.net高級教程(五)---實戰篇(結合論壇用戶操作談asp.net表單驗證)(中)

         做好準備工作,現在就要動真格的了,先讓我們看看用戶注冊的實現。前邊已經講過,asp.net可以實現業務邏輯和html代碼分離,那么讓我們來看看到底是如何實現的,下面這個文件是用戶注冊的頁面部分,原型是根據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>&nbsp;

          <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://www.okasp.com/techinfo/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>
      <!----------------------------------新用戶注冊結束---------------------->

         <!-------------------右邊豎線---------------------------------------------->
           <td bgcolor='#0097c0' width='1'>
             <img src='http://www.okasp.com/techinfo/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://www.okasp.com/techinfo/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,它可以將業務邏輯隱藏在與.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中由于系統漏洞而造成源碼泄漏所造成的問題。那么,這個包含業務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 ;

              //構造函數
              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)
                  {
                      //數據入庫
                      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,做好下面關于表單驗證內容的學習準備。





      日韩精品一区二区三区高清