没有来自通用处理程序的响应

我在我的AjaxHandler问题。因为上下文。请求["Action"]是空的，当我发送它使用JQuery调用谁可以帮助我

注意:我使用的是html控制器而不是asp,net服务器控制器

<script type="text/javascript">
    $(function () {
        $("#btnSearch").click(function () {
            /*var skill = $("#ddlSkills option:selected").val();
            var types = $("#ddlTypes option:selected").val();
            var topics = $("#ddlTopics option:selected").val();
            var sortBy = $("#ddlSortBy option:selected").val();
            */
            $.ajax({
                url: "../ideapark/DesktopModules/ResourcesFilter/AjaxHandler.ashx",
                contentType: "application/json; charset=uft-8",
                type: "POST",
                data: $('form').serialize(),
                success: function(data) {
                    for(var i = 0; i < data.length; i++)
                    {
                        //t ajax handler recollection of resources.
                        //U NEED TDESERIALIZE 
                        var resID = data.response[i].ID;
                        var summary = data.response[i].Summary;
                        var pageID = data.response[i].PageID;
                        var name = data.response[i].Name;
                        var createdOn = data.response[i].CreatedOn
                        var Total = data.response[i].Total;
                    }
                },
                error: function(XMLHttpRequest, textStatus, errorThrown)
                {
                    alert(errorThrown);
                    alert(XMLHttpRequest);
                    alert(textStatus);
                    console.log(errorThrown);
                    console.log(XMLHttpRequest);
                    console.log(textStatus);
                    console.log(errorThrown);
                }
            });
        });
    });
</script>
/// <summary>
    /// Summary description for AjaxHandler
    /// </summary>
    public class AjaxHandler : IHttpHandler
    {
        public void ProcessRequest(HttpContext context)
        {
            context.Response.ContentType = "text/json";
           //context.Response.Write("Hello World");
           string response = "";
          string var =  context.Request["Action"].ToString();
           switch (context.Request["Action"])
           {
               case "ResponseFilterSearch":
                   response += "{";

                   Dictionary<string, Object> jsonObject = new Dictionary<string, object>();
                   string skill = context.Request["Skill"].ToString();
                   string type = context.Request["Type"].ToString();
                   string focus = context.Request["focus"].ToString();
                   string keyword = context.Request["Keyword"];
                   string sortby = context.Request["SortBy"];
                   string pageNumber = context.Request["pagenumber"];
                   SqlDataProvider sqlConn = new SqlDataProvider();
                   DataSet dsResults = SqlHelper.ExecuteDataset(sqlConn.ConnectionString, "spResourceSearch", skill, type, focus, keyword, sortby, pageNumber);
                   foreach (System.Data.DataRow row in dsResults.Tables[0].Rows)
                   {
                       response += "'"ID'":" + "'"" + row["Id"].ToString() + "'"";
                       response += "'"Summary'":" + "'"" + row["summary"].ToString() + "'"";
                       response += "'"PageID'":" + "'"" + row["pageId"].ToString() + "'"";
                       response += "'"Name'":" + "'"" + row["name"].ToString() + "'"";
                       response += "'"CreatedOn'":" + "'"" + row["createdOn"].ToString() + "'"";
                       response += "'"Total'":" + "'"" + row["total"].ToString() + "'"";
                   }

                   response += "}";
                   break;
           }
           //this returns a json string
           context.Response.Write(response);
        }
        public bool IsReusable
        {
            get
            {
                return false;
            }
        }
    }