Error in serializin​g ImaqdxExce​ption

Question

Hi All,
I am trying to clone an ImaqdxException object using binary serialization and deserialization. I find that the serialization part is going fine but however, the deserialization throws up an error. Please find the sample code below
ImaqdxException exception = new ImaqdxException("Some Exception");
BinaryFormatter Formatter = new BinaryFormatter();
using (var ms = new MemoryStream())
Formatter.Serialize(ms, exception);
ms.Position = 0;
ImaqdxException replica = (ImaqdxException)Formatter.Deserialize(ms);
The exception I am getting is as follows
System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.Runtime.Serialization.SerializationExceptio​n: Member 'Error' was not found.\r\n at System.Runtime.Serialization.SerializationInfo.Get​Element(String name, Type& foundType)\r\n at System.Runtime.Serialization.SerializationInfo.Get​Int32(String name)\r\n at NationalInstruments.Vision.Acquisition.Imaqdx.Imaq​dxException..ctor(SerializationInfo info, StreamingContext context)\r\n --- End of inner exception stack trace ---\r\n at System.RuntimeMethodHandle._SerializationInvoke(Ob​ject target, SignatureStruct& declaringTypeSig, SerializationInfo info, StreamingContext context)\r\n at System.Reflection.RuntimeConstructorInfo.Serializa​tionInvoke(Object target, SerializationInfo info, StreamingContext context)\r\n at System.Runtime.Serialization.ObjectManager.Complet​eISerializableObject(Object obj, SerializationInfo info, StreamingContext context)\r\n at System.Runtime.Serialization.ObjectMana
ger.FixupSpecialObject(ObjectHolder holder)\r\n at System.Runtime.Serialization.ObjectManager.DoFixup​s()\r\n at System.Runtime.Serialization.Formatters.Binary.Obj​ectReader.Deserialize(HeaderHandler handler, __BinaryParser serParser, Boolean fCheck, Boolean isCrossAppDomain, IMethodCallMessage methodCallMessage)\r\n at System.Runtime.Serialization.Formatters.Binary.Bin​aryFormatter.Deserialize(Stream serializationStream, HeaderHandler handler, Boolean fCheck, Boolean isCrossAppDomain, IMethodCallMessage methodCallMessage)\r\n at System.Runtime.Serialization.Formatters.Binary.Bin​aryFormatter.Deserialize(Stream serializationStream)\r\n at TestIMAQdxCameraDriver.TestForm..ctor() in C:\\Development\\Projects\\CODA\\TestIMAQdxCameraC​omponent\\TestForm.cs:line 52
From the exception I believe that there was a mistake in missing out writing the "Error" property when serializing and when deserializing it is expecting to get that property.
I am using Measurement Studio 2010.
Thanks,
Venkat

Answer 1

Hi Colden,
Thank you for your time and reply. I beileve the binary formatter serializer makes use of the GetObjectData method to serialize the exception.
Also, I am afraid, I cannot say whether the result I am getting by the call to GetObjectData contains the Error property because the only way to find out is to invoke the constructor "protected ImaqdxException(SerializationInfo info, StreamingContext context)" and see the members of the newly created exception clsass; However, this constructor is protected and not public. Also, I believe binary formatter serialization does exactly these serialization and deserialization steps and there seems to be some problem mostly with the serialization I believe. I think it needs to be looked into from the source code level and we do not have the source code.
We find that the capabaility to deep clone the ImaqdxException using binary formatter to be a very useful functionality. Else we need to wrap all the methods we call to the ImaqdxCamera driver in a try catch and copy the exception text from the caught ImaqdxException to a newly created Exception object and throw the newly created exception object. This involves more work for us.
Can you please let me know whether you have a fix for this problem.
Thanks,
Venkat