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> 提交</button>
<button type="button" id="layerclose" class="btn btn btn-primary " data-dismiss="modal"><i class="fa fa-close blue"></i> 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");
}