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Read the sticky posts on top (The first two posts).
It's not necessary to be so stupid, either, but people manage it. - Christian Graus, 2009 AD
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You made me hover mouse on that link to see if you really searched that code.
It's not necessary to be so stupid, either, but people manage it. - Christian Graus, 2009 AD
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renatcoder ?
Christian Graus
Driven to the arms of OSX by Vista.
Read my blog to find out how I've worked around bugs in Microsoft tools and frameworks.
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Christian Graus wrote: renatcoder ?
rentacoder for dyslexics
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How to plug/unplug USB serial port problematically?
I am facing some strange issue with my USB serial port.
I want to unplug and plug the USB Serial port Programitically, as i need to refresh the connection between system and hardware connected.Kindly help.......
Thank in advance for the great programmers
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...
It's not necessary to be so stupid, either, but people manage it. - Christian Graus, 2009 AD
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hi you can do this using the registry.
set the DWORD of "Start" in HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\{driver}\ to "4" for disable and 3 to enable.
this may help never tested ^^
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I am looking for some one who did it problematically.
But still thanks for your Solution
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WTF is 'problematically'? I did it while using a problem?
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OP means through code.
It's not necessary to be so stupid, either, but people manage it. - Christian Graus, 2009 AD
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whats the exactly problem you have with usb plugged devices ?
i may can help you out, i wrote a serial component in c# that checks wheather the connection needs to be
closed after unplugging the device and reopend after replug the device to usb without running into exceptions..
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I have connected the usb serial port and started getting the data from the hardware.
Suddenly i will stop the hardware and re run it .Now the problem is when i return the hardware and try to re connect the my application back and try to connect the COM port, it throws me a message the port is already connected and because of this i can not receive the data, kindly help me to understand the stuff
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If you kill the hardware, the classes relating to the serial comms have probably bombed, and your application itself is holding the serial port resource on one of its async threads. I have seen this while programming to a usb/serial device (resol solar controller). When you exit the application the lock is released and then when you start the app again all is fine.
You should check that when you kill the external hardware or pull the connection, the necessary exceptions are being caught and the serial connection is closed gracefully to ensure all resource locks are released.
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The problem is that the stream in the SerialPort class will not be closed if the external hardware will be removed. this is an bug in the framework. to prevent this behaviour the solution is to rewrite a serial port class using unmanaged code or to kill the application like daveauld described above..
serial port communication was not designed to work during the hardware will be removed. in ealy cases this was not possible because the COM was an integrated hardware in the pc not an usb plugalbe device.
i had the same problem and sovled it by rewriting the serial port (internal catching read/write errors and than closing and reopening the filestream on COM).
bless
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and it may be wise to call DiscardInBuffer() and DiscardOutBuffer() right after creating your serial port, and before connecting any event handlers to it.
Luc Pattyn
I only read code that is properly indented, and rendered in a non-proportional font; hint: use PRE tags in forum messages
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i want to display report in a3 sheet. while display only one half of report is shown but when export report to excel full report is available
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Not sure if this sending you down the right route, but does the default printer on your PC support A3 printing?
Steve Jowett
-------------------------
Real programmers don't comment their code. If it was hard to write, it should be hard to read.
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Want Remote Connection in Sql Server with C# application ... via Sql Server Authentication... Data Souurce name was created Successfully ... But Could not Access that DataSource name from our C# appliction...Wht is Trusted in Sql Server ....
Thanks
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Well, the best place to ask this would be the C# forum, not the vb one, but anyway check out http://www.connectionstrings.com. It would also help if you posted the error.
Bob
Ashfield Consultants Ltd
Proud to be a 2009 Code Project MVP
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1. Wrong forum. This should go to C#/General database forum depending on your problem.
2. If connection string is the problem, take a look at ConnectionStrings.com website.
3. If remote conection is the problem, check if your SQL server allows remote connection. You can change the settings through Surface Area configuration provided you have the authority to do so.
It's not necessary to be so stupid, either, but people manage it. - Christian Graus, 2009 AD
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I have a need where i need to read email for a particular email account (help@somedomain.com). how can i read teh email account from exchange server.
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Exchange server 2007 has a web service which you should use - google for Exchange Web Service or EWS. Its not all that straight forward, but its not difficult. Prior to this, you could use WebDav or CDO/MAPI
Bob
Ashfield Consultants Ltd
Proud to be a 2009 Code Project MVP
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Use redemption....excellent resource for handling emails from outlook or exchange server.
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Can we send emails in Exchange Server 2007 without using SMTP means without activating it,
I used CDO/MAPI , Winsocks but could not succeed without SMTP is their any wayBest Regards,
SOFTDEV
If you have knowledge, let others light their candles at it
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You can by using the web service. Check the documentation, you can do just about anything via the exchange web service. Bob
Ashfield Consultants Ltd
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