c# - 如何解决 System.RuntimeType 由于其保护级别而无法访问的问题。只能处理公共(public)类型。

Question

我正在尝试序列化我的类(class)。但我遇到了以下异常，

  System.InvalidOperationException was unhandled
  HResult=-2146233079
  Message=There was an error generating the XML document.
  Source=System.Xml
  StackTrace:
       at System.Xml.Serialization.XmlSerializer.Serialize(XmlWriter xmlWriter, Object o, XmlSerializerNamespaces namespaces, String encodingStyle, String id)
       at System.Xml.Serialization.XmlSerializer.Serialize(XmlWriter xmlWriter, Object o)
       at FormDemo.Form1.PivotGridSettings() in D:\Feature\XML Serialization\CS\Form1.cs:line 75
       at FormDemo.Form1..ctor() in D:\Feature\XML Serialization\CS\Form1.cs:line 32
       at FormDemo.Program.Main() in D:\Feature\XML Serialization\CS\Program.cs:line 25
       at System.AppDomain._nExecuteAssembly(RuntimeAssembly assembly, String[] args)
       at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)
       at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
       at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
       at System.Threading.ThreadHelper.ThreadStart()
  InnerException: System.InvalidOperationException
       HResult=-2146233079
       Message=System.RuntimeType is inaccessible due to its protection level. Only public types can be processed.
       Source=System.Xml
       StackTrace:
            at System.Xml.Serialization.TypeDesc.CheckSupported()
            at System.Xml.Serialization.TypeScope.GetTypeDesc(Type type, MemberInfo source, Boolean directReference, Boolean throwOnError)
            at System.Xml.Serialization.XmlSerializationWriter.CreateUnknownTypeException(Type type)
            at Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationWriterCustomSerializer.Write20_Type(String n, String ns, Type o, Boolean isNullable, Boolean needType)
            at Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationWriterCustomSerializer.Write24_CustomClass(String n, String ns, CustomEngine o, Boolean isNullable, Boolean needType)
            at Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationWriterCustomSerializer.Write25_CustomClass(String n, String ns, CustomSeriaizer o, Boolean isNullable, Boolean needType)
            at Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationWriterCustomSerializer.Write26_CustomSerializer(Object o)
       InnerException: 

我的序列化代码是

XmlTextWriter xw = new XmlTextWriter("CustomClassSchema.xml", System.Text.Encoding.UTF8);
xw.Formatting = Formatting.Indented;
XmlSerializer serializer = new XmlSerializer(typeof(CustomSerializer));
CustomSerializer customSerializer = new CustomSerializer()
serializer.Serialize(xw, customSerializer);

请帮我解决这个问题。我需要对我的自定义类进行任何自定义吗？

Answer 1

如果您无法为您的 CustomSerializer 类提供定义(从名称来看，尝试序列化是一件奇怪的事情......)，那么您看到此错误的原因是因为该类包含一个公共(public)属性，该属性要么是一个 RuntimeType，要么继承自 RuntimeType，要么包含一个 RuntimeType 属性本身。或者也许您的整个类都继承RuntimeType？

无论如何，RuntimeType 似乎不可序列化，因此您会收到所看到的异常。

同样，不知道您的 CustomSerializer 是什么，我无法指出确切的解决方案 - 它可能就像使属性不可序列化一样简单......