Getting more info from exception

  • Thread starter Thread starter Claire
  • Start date Start date
C

Claire

Regarding IOException
I'm catching this error while querying for available serial ports using a
third party component.
I attempt to open then close the comport and if this error type is thrown
then I don't list the port in a combo box.
But I would like to discern between a comport not being available and one
that is available but in use, easy with getlasterror.
Is it possible to do this?
 
Claire,

I think that the way that you are going about it isn't the best. If you
can, I would use the classes in the System.Management namespace to create a
WMI query for all instances of Win32_SerialPort. This would probably be
faster than looping through and catching exceptions (which is expensive).

An added benefit is that if you query for instances of Win32_SerialPort,
then you can get all the other information you need about it (if it is
available or not).

Hope this helps.
 
thanks Nicholas.
I think the knowledge of how to go about this is way beyond my few days xp
of C#.
Ive added the system.management reference to my project, took a look at the
help file and my heart dropped.
Are there some example code snippets somewhere that would give me a hint on
where to start (im working from home today so no reference books. Not even
sure if they would contain this sort of thing)

Nicholas Paldino said:
Claire,

I think that the way that you are going about it isn't the best. If you
can, I would use the classes in the System.Management namespace to create a
WMI query for all instances of Win32_SerialPort. This would probably be
faster than looping through and catching exceptions (which is expensive).

An added benefit is that if you query for instances of Win32_SerialPort,
then you can get all the other information you need about it (if it is
available or not).

Hope this helps.


--
- Nicholas Paldino [.NET/C# MVP]
- (e-mail address removed)

Claire said:
Regarding IOException
I'm catching this error while querying for available serial ports using a
third party component.
I attempt to open then close the comport and if this error type is thrown
then I don't list the port in a combo box.
But I would like to discern between a comport not being available and one
that is available but in use, easy with getlasterror.
Is it possible to do this?
Click to expand...
Click to expand...
 
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