jquery.validationEngine-zh_CN.js 验证规则

<div class="form-group row-fluid">
                                <label for="AccountName">用户名称</label>
                                <i class="fa fa-user"></i>
                                <input type="text" name="AccountName" id="AccountName" class="form-control  validate[required,ajax[AccountNameCheck],minSize[4],maxSize[20]]" />
                            </div>

 $(function () {
        App.setPage("login"); //Set current page
        App.init(); //Initialise plugins and elements
        $("#formlogin").validationEngine();
        $("#account").validationEngine();
        $("#InputAccount").focus();
    });

"AccountNameCheck": {
                    "url": "/Account/AccountNameCheck",
                    // you may want to pass extra data on the ajax call
                    "extraData": "name=eric",
                    "alertText": "* 该用户名称已被其他人使用",
                    "alertTextOk": "* 该用户名称可以使用",
                    "alertTextLoad": "* 正在确认用户名是否有其他人使用，请稍等。"
                },

public JsonResult AccountNameCheck(String fieldId, String fieldValue)
        {
            List<object> validateReturn = new List<object>();
            validateReturn.Add(fieldId);
            try
            {
                Account account = db.Accounts.Where(c => c.AccountName == fieldValue).FirstOrDefault();
                if (account != null)
                {
                    validateReturn.Add(false);
                }
                else
                {
                    validateReturn.Add(true);
                }
            }
            catch (Exception ex)
            {
                validateReturn.Add(false);
            }
            return Json(validateReturn, JsonRequestBehavior.AllowGet);
        }