Question

我创建控制器函数获取数据为json。在视图中我使用此函数来获取ajax请求中的数据。当我在返回栏中给出模型时

return Json(model, JsonRequestBehavior.AllowGet);

像这样我得到了这个错误

，而串行化类型＆＃39的一个目的是检测到一个循环引用; System.Data.Entity.DynamicProxies.InformationSecurityD_296951563FA1E6AF124B046E5DF9F5DA6F8E47C12B96ADB9C71A501E9BDE702D＆＃39;

当我在这样的回归块中给json时

return Json(json, JsonRequestBehavior.AllowGet);

然后它给出了双序列化问题，我无法处理它

控制器功能

[HttpPost]
    public JsonResult GetallData(int id)
    {
        MultipleViewModel model = new MultipleViewModel();
        List<InformationSecurityData> iso = db.InformationSecurityDatas.Where(x => x.Supplier_ID == id).ToList();
        List<SurveyForm> tender = db.SurveyForms.Where(x => x.Supplier_ID == id ).ToList();
        List<ProcurementData> procurement = db.ProcurementDatas.Where(x => x.Supplier_ID == id ).ToList();
        List<Supplier> supp = db.Suppliers.Where(x => x.Supplier_ID == id).ToList();

        model.Inf_Sec_Dat = iso;
        model.Proc_Dat = procurement;
        model.Tender_Dat = tender;
        model.Supp_dat = supp;

        var serializerSettings = new JsonSerializerSettings { PreserveReferencesHandling = PreserveReferencesHandling.Objects };
        string json = JsonConvert.SerializeObject(model, Formatting.Indented, serializerSettings);
        MultipleViewModel model2 = JsonConvert.DeserializeObject<MultipleViewModel>(json);

        return Json(model, JsonRequestBehavior.AllowGet);
    }

视图

$(document).ready(function () {
            $("#GetallData").click(function () {
                var id = $("#id").val();
                $.ajax({
                    url: '/Dashboard/GetallData/'+id,
                    type: 'POST',
                    cache: false,
                    dataType: 'json',
                    contentType: 'application/json',
                    success: function (data) {
                        alert("success ");
                        //var myJSON = JSON.stringify(obj);
                        Objdata = jQuery.parseJSON(data);
                        alert(Objdata);
                        if (Objdata.Inf_Sec_Dat) {
                            $.each(Objdata.Inf_Sec_Dat, function (i, item) {
                                iso_data.push(item.Total_Score);
                            });
                            alert(iso_data);
                        }
                        bindChart(iso_data);
                        if (Objdata.Tender_Dat) {
                            $.each(Objdata.Tender_Dat, function (i, item) {
                                tender_data.push(item.Total_Score);
                            });
                        }
                        bindChart2(tender_data);
                        //bindChart3(tender_data);
                    },
                    error: function (response) {
                        alert("error_tender" + response);
                    }
                });
            });
        });

请帮助我无法处理

在序列化类型对象或双序列化时检测到循环引用

0 个答案: