private void btnLogin_Click(object sender, System.EventArgs e)
{

try
{

string userName=txtUserName.Text;
string password=txtPassword.Text;

if(userName.Equals(\"\"))
{
lbWarning.Text=TextProvider.GetTextProvider().GetText(\"login.need.username\");
return;
}
if(password.Equals(\"\"))
{
lbWarning.Text=TextProvider.GetTextProvider().GetText(\"login.need.password\");
return;
}

IWindsorContainer container = ContainerWebAccessorUtil.ObtainContainer();
IUserMgr userMgr=(IUserMgr)container[\"userMgr\"];

User u=userMgr.Login(userName,password);
if(u==null)
{
lbWarning.Text=TextProvider.GetTextProvider().GetText(\"login.error\");
return;
}
else
{
//lbWarning.Text=\"login ok!\";
userMgr.DoUpdateLastLoginTime(u.Id);
HttpContext.Current.Session[\"User\"] = u;
HttpContext.Current.Response.Redirect(\"index.aspx\", true);
}
}
catch(BusiException ex)
{
lbWarning.Text=ex.ShowMessage(ex);
}

}
}
}

get_cookie 是用戶自定義的函數(shù)；得到的cookie值應(yīng)該被加密了；
你可以看下用戶自定義設(shè)置cookie的函數(shù)，估計(jì)函數(shù)名是set_cookie；
看看設(shè)置cookie的時(shí)候，是如何加密的