ASP.NET

$.ajax({
               type: "POST",
               url: "WebService.asmx/GetGrid",
               data: data,
               contentType: "application/json; charset=utf-8",
               dataType: "json",
               success: function(result){
                    $('#divAjaxGridViewContainer').html(result.d);
               },
               error: function(error) {
                   alert("Error");
               }
           });

[WebMethod]
   public string GetPage(object[] criteria)
   {
       Page page = new Page {ViewStateMode = ViewStateMode.Disabled};

       AjaxGridView grid = (AjaxGridView)page.LoadControl("~/Controls/AjaxGridView.ascx");
       grid.ViewStateMode = ViewStateMode.Disabled;

       grid.BindData(criteria);

       HtmlForm form = new HtmlForm {ViewStateMode = ViewStateMode.Disabled};

       form.Controls.Add(grid);

       page.Controls.Add(form);

       string result = String.Empty;

       using (StringWriter output = new StringWriter())
       {
           page.Server.Execute(page, output, false);
           result = output.ToString();
       }
       return result;
   }

function __doPostBack(eventTarget, eventArgument) {
       if (!theForm.onsubmit || (theForm.onsubmit() != false)) {
           theForm.__EVENTTARGET.value = eventTarget;
           theForm.__EVENTARGUMENT.value = eventArgument;
           theForm.submit();
       }
   }

Validation of viewstate MAC failed. If this application is hosted by a Web Farm or cluster, ensure that <machineKey> configuration specifies the same validationKey and validation algorithm. AutoGenerate cannot be used in a cluster.

event_log_sql_command.Parameters.Add("param_mobile_manufacturer", MySqlDbType.VarChar).Value = HttpContext.Current.Request.Browser.MobileDeviceManufacturer;
event_log_sql_command.Parameters.Add("param_mobile_model", MySqlDbType.VarChar).Value = HttpContext.Current.Request.Browser.MobileDeviceModel;