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I am writing a application in C# using a serial port.Now,i wanna detect a device usb-com which plug/unlug.What must i do?Thanks

Posted 3-Jun-12 21:55pm

congtk88

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**Zoltán Zörgő** · Answer 1 · 2012-06-03T22:49:00

Solution 1

Have you googled for it?
Your keyword is WMI.
Look here:
Enumerate and Auto-Detect USB Drives[^]
http://dotnetslackers.com/Community/blogs/basharkokash/archive/2008/02/06/usb-port-insert-remove-detection-using-wmi.aspx[^]

Posted 3-Jun-12 22:49pm

Zoltán Zörgő

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congtk88 4-Jun-12 11:30am

I am using Visual Studio 2008.I read your instruction and followed it.But i can not use it.My VS2008 does not contain object "WqlEventQuery,ManagementScope,ManagementEventWatcher".Can you help me?Thanks

Zoltán Zörgő 4-Jun-12 14:28pm

You should add a reference to: System.Management from the .net page.

congtk88 5-Jun-12 11:49am

I have add it,but it does not work.Thanks!

Zoltán Zörgő 5-Jun-12 14:32pm

Than this topic is solved, right? :)

congtk88 13-Jun-12 3:52am

I can't solve it.Thanks!

Vipin_Arora · Answer 2 · 2012-06-03T23:11:00

Solution 2

Hi,

Try following link:

http://stackoverflow.com/questions/9835881/releasing-a-unplugged-virtual-serial-port[^]

Posted 3-Jun-12 23:11pm

Vipin_Arora

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congtk88 4-Jun-12 11:33am

I am using Visual Studio 2008.I read your instruction and followed it.But i can not use it.My VS2008 does not contain object "ManagementObjectSearcher".Can you help me?Thanks