Entity Framework Navigation
尝试序列化我的Kendo Grid
中的集合时, View Model
属性导致“循环对象引用” 异常。我们正在使用Newtonsoft.JSON
,所以我想(在全局上)在我的Application_Start()
中将“ ReferenceLoopHandling” 设置为“忽略” 。
奇怪的是,ASP.NET似乎并没有遵守该设置...因此我仍然遇到异常。
...任何想法?
版本:
样品申请_START:
移至 top 或底部的调用不会改变结果...
protected void Application_Start()
{
AreaRegistration.RegisterAllAreas();
GlobalConfiguration.Configure(WebApiConfig.Register);
FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);
RouteConfig.RegisterRoutes(RouteTable.Routes);
BundleConfig.RegisterBundles(BundleTable.Bundles);
LoadSiteMap();
var json = GlobalConfiguration.Configuration.Formatters.JsonFormatter;
json.SerializerSettings.ReferenceLoopHandling = Newtonsoft.Json.ReferenceLoopHandling.Ignore;
}
示例剃刀标记:
注意“ BindTo”选项...
@(Html.Kendo().Grid<RTUDeviceControlRoomAlarm>()
.Columns(columns =>
{
columns.Bound(x => x.Id)
.Visible(false);
columns.Bound(x => x.RTUDeviceId)
.Visible(false);
columns.Bound(x => x.Register)
.Title("Register")
.Width(50);
columns.Bound(x => x.Description)
.Title("Description")
.Width(100);
columns.Bound(x => x.LowLowLimitOFF)
.Title("LL Limit/OFF")
.Width(50);
columns.Bound(x => x.LowLowLimitON)
.Title("LL Limit/ON")
.Width(50);
columns.Bound(x => x.HiLimit)
.Title("Hi Limit")
.Width(50);
columns.Bound(x => x.HiHiLimit)
.Title("HH Limit")
.Width(50);
columns.Command(command => { command.Edit(); command.Destroy(); }).Width(70);
})
.Name("gridControlRoomAlarms")
.ToolBar(toolbar => toolbar.Create())
.Editable(editable => editable.Mode(GridEditMode.InLine))
.Sortable()
.Scrollable()
.BindTo(Model.RTUDeviceControlRoomAlarms)
.DataSource(dataSource => dataSource.Ajax()
.PageSize(50)
.Model(model => { model.Id(m => m.Id); })
.Create(update => update.Action("Create", "ControlRoomAlarm", new { Area = "Documents" }))
.Update(update => update.Action("Update", "ControlRoomAlarm", new { Area = "Documents" }))
.Destroy(update => update.Action("Destroy", "ControlRoomAlarm", new { Area = "Documents" }))
)
.HtmlAttributes(new { @class = "", @style = "height: 400px;" }))
更新:
也尝试过...
GlobalConfiguration.Configuration.Formatters.JsonFormatter.SerializerSettings.ReferenceLoopHandling = Newtonsoft.Json.ReferenceLoopHandling.Ignore;
答案 0 :(得分:0)
尝试在您的Application_Start()
的最后一行中添加此配置:
json.SerializerSettings.PreserveReferencesHandling = Newtonsoft.Json.PreserveReferencesHandling.None;
请参见https://www.newtonsoft.com/json/help/html/PreserveObjectReferences.htm,并注意代码中可能出现的副作用