Generic HID example work only under .NET Framework 2.0

[Frank Neumann]

For 4 days I try to find out why the code (Generic HID 50) does not work with my Visual Studio settings! :-)

Now today I found out that the sample code of Jan Axelson is based on the framework 2.0, where I set mine to 4.5.

Who can tell me what I need to change in the code so that the example of Jan Axelson also works under the Framework 4.5?

thank you in advance
Frank Neumann

[Jan Axelson]

Where is the code failing?

[Frank Neumann]

Hi Mrs. Axelson,

if I switch the Targetframework from 2.0 to 4.5 then I get the message:

Eine Ausnahme (erste Chance) des Typs "System.OverflowException" ist in GenericHid.exe aufgetreten.
An exception (first chance) of the System.OverflowException type has occurred in GenericHid.exe.

And my Hardware can not switched.

Till Framework 3.5 is OK, over 4.0 I get this message.

[Jan Axelson]

What in the code triggers the exception?

I can run the code under .NET 4.0, haven't tried higher.

Also see:

https://social.msdn.microsoft.com/Forums/lync/en-US/394ce5ba-b2fa-4046-af17-9904c00cd326/moving-to-net-46-caused-an-overflow-exception?forum=csharpgeneral

[Jan Axelson]

Try setting Build > Configuration Manager > x86

[Frank Neumann]

I have already tried, unfortunately the same behavior

[Jan Axelson]

Changing the build worked for me. If you can find where the code is failing we might be able to help.

[Frank Neumann]

How can I determine where exactly that fails?

[Jan Axelson]

Use breakpoints, single stopping.

https://stackify.com/debugging-tips-net/

[Frank Neumann]

Hallo,

at this row stopped the debugger

  fileStreamdevicedata.BeginRead(inputReportBuffer, 0, inputReportBuffer.Length, New AsyncCallback(AddressOf GetInputReportData), inputReportBuffer)

Error msg:

Eine Ausnahme (erste Chance) des Typs "System.AccessViolationException" ist in mscorlib.dll aufgetreten.

I have set Framework on 4,5
And CPU = X86

[Jan Axelson]

did you have a breakpoint there? See

https://stackoverflow.com/questions/24604941/apm-and-the-unresolved-system-accessviolationexception-mystery-on-breakpoints

[Frank Neumann]

Good morning,

no I have not set a breakpoint.

[Jan Axelson]

I'm not sure when I'll have time to look at this in more detail but will post if I have a fix. In the meantime, suggest using an earlier edition of .NET that works.

[Frank Neumann]

Hi,

now I found something.
If I set the Framework on 4,5 then the following Method shows an error.
See attachments

And this error will generated from

fileStreamdevicedata.BeginRead(inputReportBuffer, 0, inputReportBuffer.Length, New AsyncCallback(AddressOf GetInputReportData), inputReportBuffer)

[Jan Axelson]

You could try looking at the InnerException:

https://docs.microsoft.com/en-us/dotnet/api/system.reflection.targetinvocationexception?redirectedfrom=MSDN&view=netframework-4.8