Can i serialize HtmlAgilityPack.HtmlDocument [closed]

问题

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Closed 7 years ago.

Server Error in '/' Application.
Type 'HtmlAgilityPack.HtmlDocument' in Assembly 'HtmlAgilityPack, Version=1.4.0.0, Culture=neutral, PublicKeyToken=bd319b19eaf3b43a' is not marked as serializable.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.Runtime.Serialization.SerializationException: Type 'HtmlAgilityPack.HtmlDocument' in Assembly 'HtmlAgilityPack, Version=1.4.0.0, Culture=neutral, PublicKeyToken=bd319b19eaf3b43a' is not marked as serializable.

Source Error:

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

Stack Trace:

[SerializationException: Type 'HtmlAgilityPack.HtmlDocument' in Assembly 'HtmlAgilityPack, Version=1.4.0.0, Culture=neutral, PublicKeyToken=bd319b19eaf3b43a' is not marked as serializable.]
   System.Runtime.Serialization.FormatterServices.InternalGetSerializableMembers(RuntimeType type) +9449041
   System.Runtime.Serialization.FormatterServices.GetSerializableMembers(Type type, StreamingContext context) +247
   System.Runtime.Serialization.Formatters.Binary.WriteObjectInfo.InitMemberInfo() +160
   System.Runtime.Serialization.Formatters.Binary.WriteObjectInfo.InitSerialize(Object obj, ISurrogateSelector surrogateSelector, StreamingContext context, SerObjectInfoInit serObjectInfoInit, IFormatterConverter converter, ObjectWriter objectWriter, SerializationBinder binder) +473
   System.Runtime.Serialization.Formatters.Binary.WriteObjectInfo.Serialize(Object obj, ISurrogateSelector surrogateSelector, StreamingContext context, SerObjectInfoInit serObjectInfoInit, IFormatterConverter converter, ObjectWriter objectWriter, SerializationBinder binder) +54
   System.Runtime.Serialization.Formatters.Binary.ObjectWriter.Serialize(Object graph, Header[] inHeaders, __BinaryWriter serWriter, Boolean fCheck) +542
   System.Runtime.Serialization.Formatters.Binary.BinaryFormatter.Serialize(Stream serializationStream, Object graph, Header[] headers, Boolean fCheck) +133
   System.Runtime.Serialization.Formatters.Binary.BinaryFormatter.Serialize(Stream serializationStream, Object graph) +13
   System.Web.UI.ObjectStateFormatter.SerializeValue(SerializerBinaryWriter writer, Object value) +3056

[ArgumentException: Error serializing value 'HtmlAgilityPack.HtmlDocument' of type 'HtmlAgilityPack.HtmlDocument.']
   System.Web.UI.ObjectStateFormatter.SerializeValue(SerializerBinaryWriter writer, Object value) +3371
   System.Web.UI.ObjectStateFormatter.Serialize(Stream outputStream, Object stateGraph) +141
   System.Web.UI.ObjectStateFormatter.Serialize(Object stateGraph) +57
   System.Web.UI.ObjectStateFormatter.System.Web.UI.IStateFormatter.Serialize(Object state) +4
   System.Web.UI.Util.SerializeWithAssert(IStateFormatter formatter, Object stateGraph) +37
   System.Web.UI.HiddenFieldPageStatePersister.Save() +79
   System.Web.UI.Page.SavePageStateToPersistenceMedium(Object state) +108
   System.Web.UI.Page.SaveAllState() +315
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +2839


Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.0.30319.272 

code:

public HtmlDocument HtmlDoc
        {
            get
            {
                if (ViewState["HtmlDoc"] != null)
                    return ViewState["HtmlDoc"] as HtmlDocument;
                else
                {
                    return new HtmlDocument();
                }
            }
            set
            {
                if (value != null)
                {
                    ViewState["HtmlDoc"] = value;
                }
            }
        }

回答1:

Based on the fact that the exception states the class is not marked as serializable, I would say "no". Question: why are you storing an HtmlDocument object in the session? Why not store it as text?

回答2:

Based on the exception, the class is not marked to be serializable.

One way that you would be able to serialize the HtmlDocument would be to create a class that mimics that class, copy all of the properties from one to the other and serialize your copy. Or, you could download the sources, edit the HtmlDocument class to be serializable, and recompile and reference that in your project

You could use a class such as AutoMapper to map the properties back and forth, so that you're not writing all the mapping code yourself.

来源：https://stackoverflow.com/questions/9623328/can-i-serialize-htmlagilitypack-htmldocument