private static string isnotexist(string openid)
{
StudentInfo studentinfo = DBManual.SelectUser(openid);
studentinfo.Check();
if (studentinfo.IsSuccess)
{
return("请确认您的密码:" + HttpUtility.UrlDecode(studentinfo.pwd) + "正确，我们将在24小时内为您开通功能。");
}
else
{
return(studentinfo.errormessage);
}
}