我正在尝试序列化一个对象以 Json 格式返回它以创建图形。我在类库中执行此操作并将字符串作为更大报告的一部分返回。我收到一个错误,但是说:
A circular reference was detected while serializing an object of type 'MyApp.Data.Shop'
.
我正在关注本教程并期望返回一个类似的 Json 字符串(当然还有更多字段) -教程
在我的报告引擎中,此方法中引发了错误-
public string GetMonthlyShopSalesJson(List<Sale> sales, MonthlyRequest reportRequest)
{
List<MonthlyShopSales> mrs = GetMonthlyShopSales(sales, reportRequest);
JavaScriptSerializer serializer = new JavaScriptSerializer();
string jsonData = serializer.Serialize(mrs); //Error line
return jsonData;
}
这是我检索商店销售额的方法:
public List<MonthlyShopSales> GetMonthlyShopSales(List<Sale> sales, MonthlyRequest reportRequest)
{
ModelContainer ctn = new ModelContainer();
MonthlyDateRange dates = GetComparativeDateRange(reportRequest);
List<MonthlyShopSales> shopSales = (from sale in sales
orderby sale.Shop.Name
group sale by sale.Shop into ret
select new MonthlyShopSales
{
Shop = ret.Key,
TotalNumItemsSoldUSD = ret.Where(it => it.USDCut.HasValue).Where(it => it.USDCut != 0).Count(),
TotalNumItemsSoldGBP = ret.Where(it => it.GBPCut.HasValue).Where(it => it.GBPCut != 0).Count(),
TotalNumItemsSoldEUR = ret.Where(it => it.EURCut.HasValue).Where(it => it.EURCut != 0).Count(),
USDTotalEarnings = PerformCurrencyConversion(ret.Sum(it => it.USDCut.HasValue ? it.USDCut.Value : 0), 0M, 0M, reportRequest.Currency, dates.BaseStartDate),
GBPTotalEarnings = PerformCurrencyConversion(0M, ret.Sum(it => it.GBPCut.HasValue ? it.GBPCut.Value : 0), 0M, reportRequest.Currency, dates.BaseStartDate),
EURTotalEarnings = PerformCurrencyConversion(0M, 0M, ret.Sum(it => it.EURCut.HasValue ? it.EURCut.Value : 0), reportRequest.Currency, dates.BaseStartDate),
TotalNumItemsSoldUSDOverall = sales.Where(it => it.USDCut.HasValue).Where(it => it.USDCut != 0).Count(),
TotalNumItemsSoldGBPOverall = sales.Where(it => it.GBPCut.HasValue).Where(it => it.GBPCut != 0).Count(),
TotalNumItemsSoldEUROverall = sales.Where(it => it.EURCut.HasValue).Where(it => it.EURCut != 0).Count(),
USDTotalEarningsOverall = PerformCurrencyConversion(sales.Sum(it => it.USDCut.HasValue ? it.USDCut.Value : 0), 0M, 0M, reportRequest.Currency, dates.BaseStartDate),
GBPTotalEarningsOverall = PerformCurrencyConversion(0M, sales.Sum(it => it.GBPCut.HasValue ? it.GBPCut.Value : 0), 0M, reportRequest.Currency, dates.BaseStartDate),
EURTotalEarningsOverall = PerformCurrencyConversion(0M, 0M, sales.Sum(it => it.EURCut.HasValue ? it.EURCut.Value : 0), reportRequest.Currency, dates.BaseStartDate)
}).ToList();
return shopSales;
}
然后这是我的 MonthlyShopSales 课程:
public class MonthlyShopSales
{
public Shop Shop { get; set; }
public int TotalNumItemsSoldUSD { get; set; }
public int TotalNumItemsSoldGBP { get; set; }
public int TotalNumItemsSoldEUR { get; set; }
public int NumberOfItemsSoldPerShop { get { return TotalNumItemsSoldUSD + TotalNumItemsSoldGBP + TotalNumItemsSoldEUR; } }
public decimal USDTotalEarnings { get; set; }
public decimal GBPTotalEarnings { get; set; }
public decimal EURTotalEarnings { get; set; }
public decimal OverallEarningsPerShop { get { return USDTotalEarnings + GBPTotalEarnings + EURTotalEarnings; } }
public decimal QtyPercentageOfSales { get { return ((decimal)NumberOfItemsSoldPerShop / (decimal)TotalNumberOfBooksSoldOverall) * 100; } }
public decimal RevenuePercentageOfSales { get { return (OverallEarningsPerShop / TotalEarningsOverall) * 100; } }
public int TotalNumItemsSoldUSDOverall { get; set; }
public int TotalNumItemsSoldGBPOverall { get; set; }
public int TotalNumItemsSoldEUROverall { get; set; }
public int TotalNumberOfItemsSoldOverall { get { return TotalNumItemsSoldUSDOverall + TotalNumItemsSoldGBPOverall + TotalNumItemsSoldEUROverall; } }
public decimal USDTotalEarningsOverall { get; set; }
public decimal GBPTotalEarningsOverall { get; set; }
public decimal EURTotalEarningsOverall { get; set; }
public decimal TotalEarningsOverall { get { return USDTotalEarningsOverall + GBPTotalEarningsOverall + EURTotalEarningsOverall; } }
}
我正在尝试使用我正在编写的代码相对高效,这就是为什么我两次使用 GetMonthlyShopSales 方法 - 我不一定需要它的所有值,所以我应该为我编写一个单独的、更精简的版本json字符串?我也不确定这是否是我的问题,如果有人可以提供帮助,那就太好了。
这是任何擅长阅读的人的堆栈跟踪:
[InvalidOperationException: A circular reference was detected while serializing an object of type 'MyApp.Data.Shop'.]
System.Web.Script.Serialization.JavaScriptSerializer.SerializeValueInternal(Object o, StringBuilder sb, Int32 depth, Hashtable objectsInUse, SerializationFormat serializationFormat) +1549
System.Web.Script.Serialization.JavaScriptSerializer.SerializeValue(Object o, StringBuilder sb, Int32 depth, Hashtable objectsInUse, SerializationFormat serializationFormat) +194
System.Web.Script.Serialization.JavaScriptSerializer.SerializeCustomObject(Object o, StringBuilder sb, Int32 depth, Hashtable objectsInUse, SerializationFormat serializationFormat) +502
System.Web.Script.Serialization.JavaScriptSerializer.SerializeValueInternal(Object o, StringBuilder sb, Int32 depth, Hashtable objectsInUse, SerializationFormat serializationFormat) +1424
System.Web.Script.Serialization.JavaScriptSerializer.SerializeValue(Object o, StringBuilder sb, Int32 depth, Hashtable objectsInUse, SerializationFormat serializationFormat) +194
System.Web.Script.Serialization.JavaScriptSerializer.SerializeEnumerable(IEnumerable enumerable, StringBuilder sb, Int32 depth, Hashtable objectsInUse, SerializationFormat serializationFormat) +126
System.Web.Script.Serialization.JavaScriptSerializer.SerializeValueInternal(Object o, StringBuilder sb, Int32 depth, Hashtable objectsInUse, SerializationFormat serializationFormat) +1380
System.Web.Script.Serialization.JavaScriptSerializer.SerializeValue(Object o, StringBuilder sb, Int32 depth, Hashtable objectsInUse, SerializationFormat serializationFormat) +194
System.Web.Script.Serialization.JavaScriptSerializer.SerializeCustomObject(Object o, StringBuilder sb, Int32 depth, Hashtable objectsInUse, SerializationFormat serializationFormat) +502
System.Web.Script.Serialization.JavaScriptSerializer.SerializeValueInternal(Object o, StringBuilder sb, Int32 depth, Hashtable objectsInUse, SerializationFormat serializationFormat) +1424
System.Web.Script.Serialization.JavaScriptSerializer.SerializeValue(Object o, StringBuilder sb, Int32 depth, Hashtable objectsInUse, SerializationFormat serializationFormat) +194
System.Web.Script.Serialization.JavaScriptSerializer.SerializeCustomObject(Object o, StringBuilder sb, Int32 depth, Hashtable objectsInUse, SerializationFormat serializationFormat) +502
System.Web.Script.Serialization.JavaScriptSerializer.SerializeValueInternal(Object o, StringBuilder sb, Int32 depth, Hashtable objectsInUse, SerializationFormat serializationFormat) +1424
System.Web.Script.Serialization.JavaScriptSerializer.SerializeValue(Object o, StringBuilder sb, Int32 depth, Hashtable objectsInUse, SerializationFormat serializationFormat) +194
System.Web.Script.Serialization.JavaScriptSerializer.SerializeEnumerable(IEnumerable enumerable, StringBuilder sb, Int32 depth, Hashtable objectsInUse, SerializationFormat serializationFormat) +126
System.Web.Script.Serialization.JavaScriptSerializer.SerializeValueInternal(Object o, StringBuilder sb, Int32 depth, Hashtable objectsInUse, SerializationFormat serializationFormat) +1380
System.Web.Script.Serialization.JavaScriptSerializer.SerializeValue(Object o, StringBuilder sb, Int32 depth, Hashtable objectsInUse, SerializationFormat serializationFormat) +194
System.Web.Script.Serialization.JavaScriptSerializer.Serialize(Object obj, StringBuilder output, SerializationFormat serializationFormat) +26
System.Web.Script.Serialization.JavaScriptSerializer.Serialize(Object obj, SerializationFormat serializationFormat) +74
System.Web.Script.Serialization.JavaScriptSerializer.Serialize(Object obj) +6
MyApp.Business.Reporting.AdvancedReportingEngine.GetMonthlyShopSalesJson(List`1 sales, MonthlyRequest reportRequest) in C:\Development\MyApp\MyApp.Business\Reporting\AdvancedReportingEngine.cs:75
MyApp.Business.Reporting.AdvancedReportingEngine.GetMonthlyReport(MonthlyRequest reportRequest) in C:\Development\MyApp\MyApp.Business\Reporting\AdvancedReportingEngine.cs:61
MyApp.Web.Areas.User.Controllers.ReportsController.MonthlyDashboardReport(MonthlyRequest reportRequest, FormCollection formValues) in C:\Development\MyApp\MyApp.Web\Areas\User\Controllers\ReportsController.cs:34
lambda_method(Closure , ControllerBase , Object[] ) +157
System.Web.Mvc.ActionMethodDispatcher.Execute(ControllerBase controller, Object[] parameters) +17
System.Web.Mvc.ReflectedActionDescriptor.Execute(ControllerContext controllerContext, IDictionary`2 parameters) +208
System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod(ControllerContext controllerContext, ActionDescriptor actionDescriptor, IDictionary`2 parameters) +27
System.Web.Mvc.<>c__DisplayClass15.<InvokeActionMethodWithFilters>b__12() +55
System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodFilter(IActionFilter filter, ActionExecutingContext preContext, Func`1 continuation) +263
System.Web.Mvc.<>c__DisplayClass17.<InvokeActionMethodWithFilters>b__14() +19
System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodWithFilters(ControllerContext controllerContext, IList`1 filters, ActionDescriptor actionDescriptor, IDictionary`2 parameters) +191
System.Web.Mvc.ControllerActionInvoker.InvokeAction(ControllerContext controllerContext, String actionName) +343
System.Web.Mvc.Controller.ExecuteCore() +116
System.Web.Mvc.ControllerBase.Execute(RequestContext requestContext) +97
System.Web.Mvc.ControllerBase.System.Web.Mvc.IController.Execute(RequestContext requestContext) +10
System.Web.Mvc.<>c__DisplayClassb.<BeginProcessRequest>b__5() +37
System.Web.Mvc.Async.<>c__DisplayClass1.<MakeVoidDelegate>b__0() +21
System.Web.Mvc.Async.<>c__DisplayClass8`1.<BeginSynchronous>b__7(IAsyncResult _) +12
System.Web.Mvc.Async.WrappedAsyncResult`1.End() +62
System.Web.Mvc.<>c__DisplayClasse.<EndProcessRequest>b__d() +50
System.Web.Mvc.SecurityUtil.<GetCallInAppTrustThunk>b__0(Action f) +7
System.Web.Mvc.SecurityUtil.ProcessInApplicationTrust(Action action) +22
System.Web.Mvc.MvcHandler.EndProcessRequest(IAsyncResult asyncResult) +60
System.Web.Mvc.MvcHandler.System.Web.IHttpAsyncHandler.EndProcessRequest(IAsyncResult result) +9
System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +8970061
System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +184
编辑:
根据要求,这是商店课程。它源自 EF 数据模型,但无论如何它只有 3/4 个字段:
[MetadataType(typeof(ShopMetadata))]
public partial class Shop
{
}
public partial class ShopMetadata
{
[DisplayName("Shop Name")]
[Required(ErrorMessage = "You must specify a Shop name")]
public string Name { get; set; }
[DisplayName("Region")]
[Required(ErrorMessage = "You must specify a region")]
public int Region { get; set; }
[DisplayName("Display Sequence")]
[Required(ErrorMessage = "You must specify a dispay sequence")]
public int DisplaySequence { get; set; }
}