Jquey Ajax访问asp.net后台代码

            $.ajax({
                type: "POST",   //访问WebService使用Post方式请求
                contentType: "application/json",
                url: "UpdateNews.aspx/InsertLocalImages",
                data: "{dirName:'" + UploadPath + "',ImagePath:'" + imgpath + "',ImageName:'" + imgname + "',filetitle:'" + title + "',filedate:'" + date + "',fileexp:'" + exp + "',filekeyw:'" + keyw + "',iscovr:'" + iscovr + "'}",
                dataType: 'json',
                success: function(result) {//回调函数，result，返回值
                    if (result.d != "") {
                        //在光标处插入图片
                        InsertImage(result.d, id);
                        Dialog.alert("本地图片入库成功", function() { Dialog.close(); });
                    }
                    else {
      &