CODEWITHSUNDEEP
workflowworkflow-foundation
ksa
ksa

Reputation: 536

Receiving a PersistenceException when persisting Workflow

Here is the stack trace of the exception I get when the workflow is persisted:

System.Workflow.Runtime.Hosting.PersistenceException: Type 'System.Xml.XmlElement' in Assembly 'System.Xml, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' is not marked as serializable. ---> System.Runtime.Serialization.SerializationException: Type 'System.Xml.XmlElement' in Assembly 'System.Xml, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' is not marked as serializable.
   at System.Runtime.Serialization.FormatterServices.InternalGetSerializableMembers(RuntimeType type)
   at System.Runtime.Serialization.FormatterServices.GetSerializableMembers(Type type, StreamingContext context)
   at System.Runtime.Serialization.Formatters.Binary.WriteObjectInfo.InitMemberInfo()
   at System.Runtime.Serialization.Formatters.Binary.WriteObjectInfo.InitSerialize(Object obj, ISurrogateSelector surrogateSelector, StreamingContext context, SerObjectInfoInit serObjectInfoInit, IFormatterConverter converter, ObjectWriter objectWriter)
   at System.Runtime.Serialization.Formatters.Binary.WriteObjectInfo.Serialize(Object obj, ISurrogateSelector surrogateSelector, StreamingContext context, SerObjectInfoInit serObjectInfoInit, IFormatterConverter converter, ObjectWriter objectWriter)
   at System.Runtime.Serialization.Formatters.Binary.ObjectWriter.Serialize(Object graph, Header[] inHeaders, __BinaryWriter serWriter, Boolean fCheck)
   at System.Runtime.Serialization.Formatters.Binary.BinaryFormatter.Serialize(Stream serializationStream, Object graph, Header[] headers, Boolean fCheck)
   at System.Runtime.Serialization.Formatters.Binary.BinaryFormatter.Serialize(Stream serializationStream, Object graph)
   at System.Workflow.ComponentModel.Activity.Save(Stream stream, IFormatter formatter)
   at System.Workflow.ComponentModel.Activity.Save(Stream stream)
   at System.Workflow.Runtime.Hosting.WorkflowPersistenceService.GetDefaultSerializedForm(Activity activity)
   at System.Workflow.Runtime.Hosting.SqlWorkflowPersistenceService.SaveWorkflowInstanceState(Activity rootActivity, Boolean unlock)
   at System.Workflow.Runtime.WorkflowExecutor.Persist(Activity dynamicActivity, Boolean unlock, Boolean needsCompensation)
   --- End of inner exception stack trace ---
   at System.Workflow.Runtime.WorkflowExecutor.Persist(Activity dynamicActivity, Boolean unlock, Boolean needsCompensation)
   at System.Workflow.Runtime.WorkflowExecutor.ProtectedPersist(Boolean unlock)

How and where can I debug this exception?

Upvotes: 1

Views: 1875

Answers (1)

Maurice
Maurice

Reputation: 27632

The error message tells you right at the top:

'System.Xml.XmlElement' in Assembly 'System.Xml, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' is not marked as serializable.

When a workflow is persisted the WorkflowPersistenceService uses the binary serializer to dump all the data in the workflow. So everything in there must be either marked as non serializable or must be binary serializble. An XmlElement isn't so you must either store the data in some other way or not save it at all.

Upvotes: 2

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