前台
- HTML code
<%@ Page Language="VB" AutoEventWireup="false" CodeFile="Default.aspx.vb" Inherits="manage_Default" %><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml" ><head runat="server"> <title>无标题页</title></head><body> <form id="form1" runat="server"> <div style="text-align: center" align="center" runat="server"> <asp:Login ID="Login_User" runat="server" OnAuthenticate ="Login_User_Authenticate" > <LayoutTemplate><table style="width: 275px"> <tr> <td colspan="2" rowspan="1" style="width: 4px"> </td> </tr> <tr> <td colspan="2" rowspan="1" style="width: 4px"> <table style="width: 234px"> <tr> <td style="width: 100px; text-align: right"> 用户名：</td> <td style="width: 75px; text-align: left;"> <asp:TextBox ID="UserName" runat="server" Width="100px"></asp:TextBox></td> </tr> <tr> <td style="width: 100px; text-align: right"> 密 码：</td> <td style="width: 75px; text-align: left;"> <asp:TextBox ID="Password" runat="server" TextMode="Password" Width="100px"></asp:TextBox></td> </tr> <tr> <td style="width: 100px; text-align: right"> 验证码：</td> <td style="width: 75px; text-align: left;"> <asp:TextBox ID="TextBox3" runat="server" Width="50px"></asp:TextBox></td> </tr> </table> </td> </tr> <tr> <td colspan="2" rowspan="2" style="width: 4px"> <asp:Button ID="Button1" runat="server" CommandName="Login" Text="Button" /></td> </tr> <tr></tr></table> </LayoutTemplate> </asp:Login> </div>1 </form></body></html>
后台
- HTML code
Partial Class manage_Default Inherits System.Web.UI.Page Protected Sub Login_User_Authenticate(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.AuthenticateEventArgs) Handles Login_User.Authenticate Response.Write("<script language='javascript'>alert('登录!')</script>") 'e.Authenticated = True End SubEnd Class第一次打开页面，页面竟然不是居中而是靠左对齐，在点击登录以后，显示了一个JS的对话框，然后才是居中显示，这是为何？
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