Web 服务中的循环引用
我正在尝试解决网络服务中的循环引用。该解决方案构建良好，并且某些操作是可调用的，但使用引用类型的解决方案会出现循环引用异常（如下）。
System.InvalidOperationException: There was an error generating the XML document. ---> System.InvalidOperationException: A circular reference was detected while serializing an object of type MyCoreAssembly.MyType <-------- this is the referenced type
at System.Xml.Serialization.XmlSerializationWriter.WriteStartElement(String name, String ns, Object o, Boolean writePrefixed, XmlSerializerNamespaces xmlns)
at Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationWriter1.Write21_VRD(String n, String ns, VRD o, Boolean isNullable, Boolean needType)
at Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationWriter1.Write21_VRD(String n, String ns, VRD o, Boolean isNullable, Boolean needType)
at Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationWriter1.Write31_Hereditament(String n, String ns, Hereditament o, Boolean isNullable, Boolean needType)
at Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationWriter1.Write32_HereditamentVrd(String n, String ns, HereditamentVrd o, Boolean isNullable, Boolean needType)
at Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationWriter1.Write33_VRDResponse(String n, String ns, VRDResponse o, Boolean isNullable, Boolean needType)
at Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationWriter1.Write43_VRDResponse(Object o)
at Microsoft.Xml.Serialization.GeneratedAssembly.VRDResponseSerializer.Serialize(Object objectToSerialize, XmlSerializationWriter writer) <------- this is my type
at System.Xml.Serialization.XmlSerializer.Serialize(XmlWriter xmlWriter, Object o, XmlSerializerNamespaces namespaces, String encodingStyle, String id)
--- End of inner exception stack trace ---
at System.Xml.Serialization.XmlSerializer.Serialize(XmlWriter xmlWriter, Object o, XmlSerializerNamespaces namespaces, String encodingStyle, String id)
at System.Xml.Serialization.XmlSerializer.Serialize(TextWriter textWriter, Object o, XmlSerializerNamespaces namespaces)
at System.Web.Services.Protocols.XmlReturnWriter.Write(HttpResponse response, Stream outputStream, Object returnValue)
at System.Web.Services.Protocols.HttpServerProtocol.WriteReturns(Object[] returnValues, Stream outputStream)
at System.Web.Services.Protocols.WebServiceHandler.WriteReturns(Object[] returnValues)
at System.Web.Services.Protocols.WebServiceHandler.Invoke()
该体系结构大致如下：
Core layer <------ Data Layer <----- Logic Layer <---------- Web service
\/--------------------\/ <-------------------|
\/--------------------|
每一层都是一个单独的程序集，Web 服务引用所有三个程序集。我已经附加了一个调试器，但它没有损坏。看起来内部结构正在失败，但我不知道一切都是在哪里构建的。我将如何调试这个？
I'm trying to resolve a circular reference in a web service. The solution builds fine and some operations are callable, but one which uses a referenced type gives a circular reference exception (below).
System.InvalidOperationException: There was an error generating the XML document. ---> System.InvalidOperationException: A circular reference was detected while serializing an object of type MyCoreAssembly.MyType <-------- this is the referenced type
at System.Xml.Serialization.XmlSerializationWriter.WriteStartElement(String name, String ns, Object o, Boolean writePrefixed, XmlSerializerNamespaces xmlns)
at Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationWriter1.Write21_VRD(String n, String ns, VRD o, Boolean isNullable, Boolean needType)
at Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationWriter1.Write21_VRD(String n, String ns, VRD o, Boolean isNullable, Boolean needType)
at Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationWriter1.Write31_Hereditament(String n, String ns, Hereditament o, Boolean isNullable, Boolean needType)
at Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationWriter1.Write32_HereditamentVrd(String n, String ns, HereditamentVrd o, Boolean isNullable, Boolean needType)
at Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationWriter1.Write33_VRDResponse(String n, String ns, VRDResponse o, Boolean isNullable, Boolean needType)
at Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationWriter1.Write43_VRDResponse(Object o)
at Microsoft.Xml.Serialization.GeneratedAssembly.VRDResponseSerializer.Serialize(Object objectToSerialize, XmlSerializationWriter writer) <------- this is my type
at System.Xml.Serialization.XmlSerializer.Serialize(XmlWriter xmlWriter, Object o, XmlSerializerNamespaces namespaces, String encodingStyle, String id)
--- End of inner exception stack trace ---
at System.Xml.Serialization.XmlSerializer.Serialize(XmlWriter xmlWriter, Object o, XmlSerializerNamespaces namespaces, String encodingStyle, String id)
at System.Xml.Serialization.XmlSerializer.Serialize(TextWriter textWriter, Object o, XmlSerializerNamespaces namespaces)
at System.Web.Services.Protocols.XmlReturnWriter.Write(HttpResponse response, Stream outputStream, Object returnValue)
at System.Web.Services.Protocols.HttpServerProtocol.WriteReturns(Object[] returnValues, Stream outputStream)
at System.Web.Services.Protocols.WebServiceHandler.WriteReturns(Object[] returnValues)
at System.Web.Services.Protocols.WebServiceHandler.Invoke()
The architecture looks roughly like this:
Core layer <------ Data Layer <----- Logic Layer <---------- Web service
\/--------------------\/ <-------------------|
\/--------------------|
Each layer is a separate assembly and the web service references all three assemblies. I've attached a debugger but it doesn't break. It looks like the internals are failing but I have no idea where as everything builds. How would I go about debugging this?
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您的循环引用不在项目文件中，而是在您尝试通过 Web 服务发送的对象中。其中一个对象具有对其自身的引用或引用该对象的对象。
错误消息告诉您查看类型：MyCoreAssembly.MyType
Your circular reference is not in the project files, but in the objects you try to send over the webservice. One of you object has a reference to itself or an object that references to the object.
The error message tell you to look in your type: MyCoreAssembly.MyType