jquery ajax return jsonresult pattern

//javascript
var queryParams = {
    "userId": userId,
    "factoryId": factoryId
};

$.ajax({
    type: "POST", //默认是GET
    url: "/Home/SubmitToProcessed",
    data: queryParams,
    async: false, //异步
    cache: false, //不加载缓存
    dataType: "json",
    success: function (data) {
        
    //return single entity
    if (data.result) {
        $("#contentBefore").hide();
        $("#contentAfter").show();
    }
    else {
        $.messager.alert("操作失败", data.message);
    }

//return entity list
    foreach( var item in list)
    {
        item.id,
        item.categoryName,
    }
    },
    error: function (xmlHttpRequest, textStatus, errorThrown) {
    $.messager.alert("操作失败", "操作失败");
    }
});
 
//c# action
[HttpPost]
public JsonResult SubmitToProcessed(FormCollection collection)
{  
   boolean rlt = true //......call function;
   return Json(new { result = rlt, message = (rlt == false ? "操作失败":"") }, JsonRequestBehavior.AllowGet);

List<user> userlst = .....
   return Json(userlst, JsonRequestBehavior.AllowGet);
}