Protobuf-net:Unabletocreateinstanceofabstractclass我创建了一个具有值类型ProtoObject的通用“ProtoDictionary”。这是我的ProtoDictionary代码：publicclassProtoDictionary:Dictionary{publicvoidAdd(TKeykey,stringvalue){base.Add(key,newProtoObject<(value));}publicvoidAdd(TKeykey,Listvalue){base.Add(key,newProtoObject(value));}publicvoidAdd(TKeykey,Listvalue){base.Add(key,newProtoObject
(value));}publicvoidAdd(TKeykey,Dictionaryvalue){base.Add(key,newProtoObject
(value));}publicProtoDictionary(){//什么都不做}//注意：无论出于何种原因，如果没有此方法，此类将无法正确反序列化，即使//基类Dictionary具有SerializableAttribute。它受到保护，因此只有框架可以访问它。受保护的ProtoDictionary（SerializationInfo信息，StreamingContextcontext):base(info,context){}}对于ProtoObject：[ProtoContract][ProtoInclude(1,typeof(ProtoObject))][ProtoInclude(2,typeof(ProtoObject))][ProtoInclude(3,typeof(ProtoObject<列表>))][ProtoInclude(4,typeof(ProtoObject
))][ProtoInclude(6,typeof(ProtoObject
))][Serializable]publicabstractclassProtoObject{publicstaticProtoObjectCreate(Tvalue){returnnewProtoObject(value);}publicobjectValue{get{returnValueImpl;}设置{ValueImpl=值;}}受保护的抽象对象ValueImpl{get;放;}protectedProtoObject(){}}[ProtoContract][Serializable]publicsealedclassProtoObject:ProtoObject{publicProtoObject(){}publicProtoObject(Tvalue){Value=value;}[ProtoMember(1)]publicnewTValue{get;放;}protectedoverrideobjectValueImpl{get{返回值；}设置{值=(T)值；}}publicoverridestringToString(){returnValue.ToString();}}问题是，当我尝试使用以下代码从SQL反序列化ProtoDictionary时：publicTDeserialize(IDataReaderreader,stringcolumnName){MemoryStreamstream=newMemoryStream();字节[]缓冲区=新字节[256]；长启动索引=0;longbytesRead=reader.GetBytes(reader.GetOrdinal(columnName),startIndex,buffer,0,buffer.Length);while(bytesRead==buffer.Length){stream.Write(buffer,0,(int)bytesRead);startIndex+=bytesRead;bytesRead=reader.GetBytes(reader.GetOrdinal(columnName),startIndex,buffer,0,buffer.Length);}stream.Write(buffer,0,(int)bytesRead);stream.Seek(0,SeekOrigin.Begin);返回(T)Utilities.Deserialize(stre是）;我收到错误“InvalidOperationException：无法创建抽象类的实例”我的StackTrace如下：在ctorWrapper（）在ProtoBuf.ObjectFactory`1.Create（）在c：protobuf-net_fixedtrunkprotobuf-netObjectFactory.cs：第82行在ProtoBuf.Serializer`1.Deserialize[TCreation]（T＆instance，SerializationContext上下文）c：protobuf-net_fixedtrunkprotobuf-netSerializerT.cs：第568行在ProtoBuf.Property.PropertyMessageString`4.DeserializeImpl（TSource来源，SerializationContext上下文）c：protobuf-net_fixedtrunkprotobuf-netPropertyPropertyMessageString.cs：第53行在ProtoBuf.Property.PropertyPairString`3.DeserializeImpl（TSourcesource，SerializationContextcontext）在c：protobuf-net_fixedtrunkprotobuf-netPropertyPropertyPairString.cs：第53行在ProtoBuf.Property.PropertyList`3.DeserializeImpl（TSourcesource，SerializationContextcontext，BooleancanSetValue）inc：protobuf-net_fixedtrunkprotobuf-netPropertyPropertyList.cs：ProtoBuf.Property.PropertyList`3.Deserialize（TSourcesource，Serializa中的第64行）tionContext上下文）在c：protobuf-net_fixedtrunkprotobuf-net属性PropertyList.cs：第52行在ProtoBuf.Serializer`1.Deserialize[TCreation]（T＆instance，SerializationContext上下文）c：protobuf-net_fixedtrunkprotobuf-netSerializerT.cs：第568行在ProtoBuf.Serializer`1.DeserializeChecked[TCreation]（T＆instance，SerializationContext源）在c：protobuf-net_fixedtrunkprotobuf-netSerializerT.cs：第400行在ProtoBuf.SerializerSimpleProxy`1.Deserialize（TValue＆value，SerializationContext源））在c：protobuf-net_fixedtrunkprotobuf-netSerializerProxy.cs：第100行在ProtoBuf.Serializer.Deserialize[T]（SerializationContextsource）在c：protobuf-net_fixedtrunkprotobuf-netSerializer.cs：第302行在ProtoBuf.Serializer.Deserialize[T]（流源）c：protobuf-net_fixedtrunkprotobuf-netSerializer.cs：第289行在C：QAtrunkTestFrameworkCoreUtilities.cs中的Demand.TestFramework.Core.Utilities.Deserialize[T]（MemoryStream流）：第312行在C：QADemand.TestFramework.Core.Reports.CrawlerReport.Deserialize[T](IDataReaderreader,StringcolumnName)intrunkTestFrameworkCoreReportsCrawlerReport.cs:line145inC:QAtrunkTestFrameworkCoreReportsCrawlerReport.csDemand.TestFramework.Core.Reports中的第145行.CrawlerReport.FormatSuite(Int32parentSuiteId,GuidrunId)：第70行Demand.TestFramework.Core.Reports.CrawlerReport.Format(GuidrunId)在C:QAtrunkTestFrameworkCoreReportsCrawlerReport.cs：第150行ServiceLauncher.Form1.btnStart_Click(Objectsender,EventArgse)inC:\QAtrunkTestFrameworkServiceLauncherForm1.cs:line24inSystem.Windows.Forms.Control.OnClick(EventArgse)inSystem.Windows.Forms.Button.OnClick(EventArgse)atSystem.Windows.Forms.Button.OnMouseUp(MouseEventArgsmevent)在System.Windows.Forms.Control.WmMouseUp(Message&m,MouseButtonsbutton,Int32click)在System.Windows.Forms.Control.WndProc(Message&m)在System.Windows。Sy处的Forms.ButtonBase.WndProc(Message&m)stem.Windows.Forms.Button.WndProc（Message＆m）在System.Windows.Forms.Control.ControlNativeWindow.OnMessage（Message＆m）在System.Windows.Forms.Control.ControlNativeWindow.WndProc（Message＆m）在System.Windows.Forms.NativeWindow.DebuggableCallback（IntPtrhWnd，Int32msg，IntPtrwparam，IntPtrlparam）在System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW（MSG＆msg）在System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop（IntPtrdwComponentID，Int32原因，Int32pvLoopData）在System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner（Int32原因，ApplicationContext上下文）在System.Windows.Forms.Application.ThreadContext.RunMessageLoop（Int32原因，ApplicationContext上下文）在System.Windows.Forms.Application.Run（FormmainForm）在C：QA主干TestFrameworkServiceLauncherProgram.cs中的ServiceLauncher.Program.Main（）：第16行在System.AppDomain._nExecuteAs在Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()在System.AppDomain.ExecuteAssembly(StringassemblyFile,EvidenceassemblySecurity,String[]args)在System.Threading.ThreadHelper.ThreadStart_Context(对象状态）在System.Threading.ExecutionContext.Run（ExecutionContextexecutionContext，ContextCallback回调，对象状态，布尔值ignoreSyncCtx）在System.Threading.ExecutionContext.Run（ExecutionContextexecutionContext，ContextCallback回调，对象状态）)我不确定我做错了什么任何帮助将不胜感激。谢谢，Dan这可能只是“v1”中的一个限制。我将其添加为“v2”的测试并且它通过了（我必须创建UrlStatus和TrafficEntry才能编译）：publicvoidTestBasicRoundTrip(){varitem=newProtoDictionary();物品。添加（“abc”，“def”）；物品。Add("ghi",newList{UrlStatus.A,UrlStatus.B});varclone=Serializer.DeepClone(item);Assert.AreEqual(2,clone.Keys.Count);对象o=克隆["abc"];Assert.AreEqual("def",clone["abc"].Value);varlist=(IList)clone["ghi"].Value;Assert.AreEqual(2,list.Count);Assert.AreEqual(UrlStatus.A,list[0]);Assert.AreEqual(UrlStatus.B,list[1]);使用“v1”，也许根本不抽象它？（解决方法，未修复）另外；不需要SerializationInfoctor；protobuf-net不使用它（虽然你可以通过提供这个方法并调用Merge在BinaryFormatter中实现protobuf-net）你需要分离ProtoObject和ProtoObject吗？protobuf-net似乎在ObjectFactory中创建了一个T类型的对象（以环形方式），我假设T将是抽象的ProtoObject。抱歉，我无法提供更多帮助-我现在没有太多时间进一步挖掘。以上就是C#学习教程的全部内容：Protobuf-net:Unabletocreateaninstanceofanabstractclass.如果对大家有用，需要进一步了解C#学习教程，希望大家多多关注。本文来自网络收藏，不代表立场，如涉及侵权，请点击右边联系管理员删除。如需转载请注明出处：
