Ajax.BeginForm提示不支持live属性或方法的错误

解决：

在nuget下载最新版本的jquery.unobtrusive-ajax.min.js文件

Ajax异步请求：

引用JS：

<script type="text/javascript" src="@Url.StaticFile("/Assets/js/jquery-2.1.1.min.js")" charset="utf-8"></script>
<script type="text/javascript" src="@Url.StaticFile("/Assets/js/bootstrap.min.js")" charset="utf-8"></script>
<script type="text/javascript" src="@Url.StaticFile("/Assets/js/plugins/footable/footable.all.min.js")" charset="utf-8"></script>
<script type="text/javascript" src="@Url.StaticFile("/Assets/js/content.min.js")" charset="utf-8"></script>
<script type="text/javascript" src="@Url.StaticFile("/Assets/js/layer/layer.js")" charset="utf-8"></script>
<script type="text/javascript" src="~/Scripts/jquery.unobtrusive-ajax.min.js"></script>

jquery和jquery.unobtrusive-ajax.min.js是必须引用的

  <div class="row">
            <div class="col-sm-12 animated fadeInRight">
                @using (Ajax.BeginForm("LayerUpdateStock", "CheckStock", null,new AjaxOptions { HttpMethod = "Post", OnSuccess = "tips", OnBegin = "ValidateFunction" }))
                {
                    @Html.Hidden("ID")
                    <div class="form-group">
                        <div class="col-sm-3">金额：</div>
                        <div class="col-sm-9">
                            @Html.TextBox("UpdateNum", null, new { @class = "form-control" })
                        </div>
                    </div>      

                    <div class="form-group">
                        <div class="col-sm-3">备注：</div>
                        <div class="col-sm-9">
                   @Html.TextBox("BackInfo", null, new { @class = "form-control" })
                        </div>
                    </div>

                    <div class="form-group">
                        <div class="col-sm-12 pull-right">
                            <button class="btn btn-primary " type="submit"><i class="fa fa-check"></i>&nbsp;提交</button>
                            <button type="button" id="layerclose" class="btn btn btn-primary " data-dismiss="modal"><i class="fa fa-close blue"></i>&nbsp;关闭</button>
                        </div>
                    </div>
                }
            </div>
        </div>

成功返回和请求前的回调函数：

 function ValidateFunction() {
     if (isNaN($('#UpdateNum').val()) && $('#UpdateNum').val() != "") {
         parent.layer.msg("内容必须是数字");
         return false;
     }
 }

 function tips(data) {
     if (data == "OK") {
         parent.layer.msg("修改成功");
         location.reload();
         var index = parent.layer.getFrameIndex(window.name); //先得到当前iframe层的索引
         parent.layer.close(index); //再执行关闭
     } else {
         parent.layer.msg("修改失败");
     }
 }

后台：

        [HttpPost]
        [ValidateInput(false)]
        public ContentResult LayerUpdateStock(CheckStock stock)
        {
            var model = this.ReportDataStatics.GetCheckStock(stock.ID);
            model.UserName = this.UserContext.LoginInfo.LoginName;
            model.UpdateNum = stock.UpdateNum;
            model.BackInfo = stock.BackInfo;
            this.TryUpdateModel<CheckStock>(model);
            this.ReportDataStatics.SaveCheckSock(model);
            //JsonResult json = new JsonResult();
            //json.Data = new {result="success"};
            //return json;
            return Content("OK");
        }