asp.net - ASP.NET MVC3 AJAX.BeginForm AjaxOptions OnSuccess OnFailure问题

Question

我的问题是要调用OnFailure回调的条件是什么，运行时如何知道ajax调用失败（ajax帮助程序使用一些http响应状态代码来表明这一点？那将是什么？）。
而且，无论ajax调用失败还是成功，如果UpdateTargetId的html被更新，那么我该如何正确处理错误。很混乱...

Answer 1

 <script type="text/javascript">
        function OnSuccess() {
            alert('Success');
        }
        function OnFailure(ajaxContext) {
            var response = ajaxContext.get_response();
            var statusCode = response.get_statusCode();
            alert('Failure');
            Here you can do whatever you want with the div.
            $('#targetDiv').empty();
        }
    </script>
    <div id="targetDiv">
    @using (Ajax.BeginForm("Index", "Home", 
      new AjaxOptions 
           { 
             UpdateTargetId = "targetDiv",
             OnSuccess ="OnSuccess",
             OnFailure ="OnFailure" 
           })
      {
        ... 
      }
  </div>