public string RecoverPassword(string email)
{
UserBiz biz = new UserBiz();
int userId = biz.GetUserIdByEmail(email);
if (userId < 0)
{
base.ErrorMessage = "��Email����]���]�ԣ�Ո��<a href=\"signup.aspx\">���Ñ��]������M�]�ԡ�</a>";
return null;
}
string newPassword = RandomPassword.Generate(4);
if (ChangePassword(userId, newPassword))
return newPassword;
else
return null;
}
