ASP.NET用戶登錄和注冊的代碼

1、asp.net用戶登錄和注冊的代碼using system;using system.data;using system.configuration;using system.collections;using system.web;using system.web.security;using system.web.ui;using system.web.ui.webcontrols;using system.web.ui.webcontrols.webparts;using system.web.ui.htmlcontrols;using system.data.sqlclient;pub

2、lic partial class login : system.web.ui.page protected system.data.sqlclient.sqlconnection cn; protected system.data.sqlclient.sqlcommand cm; protected system.data.sqlclient.sqldataadapter da; protected system.data.dataset ds; protected system.data.sqlclient.sqldatareader dr; protected void page_loa

3、d(object sender, eventargs e) /if (sessionusername = null | sessionusername = ) /上面session名字用loginuser,這里的名字要和上面的相同,可以隨便改,保持一致就行了,注意:session loginuser后面,沒有tostring()哦,你要是加上的話,就會出錯了. / / response.redirect(login.aspx); /如果session為空,則轉(zhuǎn)到登陸頁. / protected void regist_click(object sender, eventargs e) stri

4、ng str = configurationsettings.appsettingsstrconnection; cn = new sqlconnection(str); cn.open(); cm = new sqlcommand(select * from userlogin where username= + nametex.text + , cn); dr = cm.executereader(); if (dr.read()/如果存在相同用戶名 response.write(alert(用戶已被注冊);window.window.location.href=login.aspx;)

5、; dr.close(); else dr.close(); sqlcommand cm2 = new sqlcommand(insert into userlogin (username,password,email,question,answer) values ( + nametex.text + , + passwtex.text + , + mailtex.text + , + questex.text + , + anstex.text + ), cn); int i = cm2.executenonquery(); /message.innerhtml = 注冊成功; respo

6、nse.write(alert(注冊成功);window.window.location.href=login.aspx;); cn.close(); protected void login_click(object sender, eventargs e) if (us.text!= null & pas.text != null) string str = configurationsettings.appsettingsstrconnection; cn = new sqlconnection(str); cn.open(); cm = new sqlcommand(select *

7、from userlogin where username= + us.text + and password = + pas.text + , cn); dr = cm.executereader(); if (dr.read()/用戶名和密碼是否正確 sessionusername = us.text; sessionpassword = pas.text; /formsauthentication.setauthcookie(usertxt.text, persistcookie.checked); / formsauthentication.redirectfromloginpage(usertxt.text, persistcookie.checked); response.write(alert(登陸成功);window.window.location.href=login.aspx;); dr.close(); else /dr.close(); /message.innerhtml = 用戶名或密碼錯誤!如果還未注冊，請先注冊！; response.write(alert(用戶名或密碼錯誤!如果還未注冊，請先注冊！);window.windo