public string PassLoginCheck(string JSonPostDataStr)
        {
            Dictionary <string, string> dic = JSonUtility.GetJSonDic(JSonPostDataStr);
            string         UserName         = dic["UserName"];
            string         Password         = dic["Password"];
            LoginCheckType LCK = (LoginCheckType)Enum.Parse(typeof(LoginCheckType), dic["LoginCheckType"]);

            bool IsPassCheck = false;

            switch (LCK)
            {
            case LoginCheckType.AD:
                IsPassCheck = new LDAP().IsAuthenticated(UserName, Password);
                break;

            case LoginCheckType.System:
                IsPassCheck = true;
                break;
            }

            //TODO:set login user object into session here.
            LoginInfo LoginInfoObj = new LoginInfo();

            LoginInfoObj.UserID     = "A001";
            LoginInfoObj.UserName   = "******";
            LoginInfoObj.Department = "IT";

            string LoginInfoObjJSonStr = ObjectToJSon.GenerateJSon(LoginInfoObj);
            string JSonKeyValuePair    = String.Format("\"{0}\":{1}", "LoginInfoObjJSonStr", LoginInfoObjJSonStr);

            JSonStringBuilder JBuilder = new JSonStringBuilder();

            JBuilder.Begin();
            JBuilder.Add("IsPassCheck", IsPassCheck.ToString().ToUpper());
            JBuilder.Add(JSonKeyValuePair);
            JBuilder.Add("Message", "test");
            JBuilder.End();

            string JSonStr = JBuilder.ToString();

            //# MUST # is login object into session here, action controller will check whether login by this session data.
            Session["CurrentLoginInfo"] = LoginInfoObj;

            //Session["test_data"] = "abcd.1234";
            return(JSonStr);
        }