File lock problem

[Grant]

Occasionally when I try and save a document:

-----------------------
xmlDoc.Save(App lication.Startu pPath + @"\Config.xml") ;
-----------------------

I get this error saying that the file could not be accessed because its
locked by another process or something (I cant get it to do it now - because
I want it to crash...)
Is there a way to check whether a file is locked by another process befre
trying to save it? If it is locked is there a way to terminate the other
process or somewhow free it up so that it can be saved?

Thanks,
Grant

[CheshireCat]

Re: File lock problem

I can't answer your specific question but if I try to open a file I use
try/catch and usually loop the process over a short time period with some
thread.sleep(0) thrown in.

[CheshireCat]

Re: File lock problem

I can't answer your specific question but if I try to open a file I use
try/catch and usually loop the process over a short time period with some
thread.sleep(0) thrown in.

[Ignacio Machin \( .NET/ C# MVP \)]

Re: File lock problem

Hi,

No, AFAIK there is no way to know if a file is locked beforehand, you have
to open it and it will give you error, use a try/catch block .

It's possible to know what process is using a given file, filemon from
sysinternals.co m does it. how ? frankly I have no idea , IIRC there is no a
easy way to get this info. of course there is not a managed way of doing it.


cheers,

--
Ignacio Machin,
ignacio.machin AT dot.state.fl.us
Florida Department Of Transportation



"Grant" <gpsnett@hotmai l.com> wrote in message
news:uFozAFcRFH A.1268@TK2MSFTN GP14.phx.gbl...[color=blue]
> Occasionally when I try and save a document:
>
> -----------------------
> xmlDoc.Save(App lication.Startu pPath + @"\Config.xml") ;
> -----------------------
>
> I get this error saying that the file could not be accessed because its
> locked by another process or something (I cant get it to do it now -
> because I want it to crash...)
> Is there a way to check whether a file is locked by another process befre
> trying to save it? If it is locked is there a way to terminate the other
> process or somewhow free it up so that it can be saved?
>
> Thanks,
> Grant
>[/color]

[Ignacio Machin \( .NET/ C# MVP \)]

Re: File lock problem

Hi,

No, AFAIK there is no way to know if a file is locked beforehand, you have
to open it and it will give you error, use a try/catch block .

It's possible to know what process is using a given file, filemon from
sysinternals.co m does it. how ? frankly I have no idea , IIRC there is no a
easy way to get this info. of course there is not a managed way of doing it.


cheers,

--
Ignacio Machin,
ignacio.machin AT dot.state.fl.us
Florida Department Of Transportation



"Grant" <gpsnett@hotmai l.com> wrote in message
news:uFozAFcRFH A.1268@TK2MSFTN GP14.phx.gbl...[color=blue]
> Occasionally when I try and save a document:
>
> -----------------------
> xmlDoc.Save(App lication.Startu pPath + @"\Config.xml") ;
> -----------------------
>
> I get this error saying that the file could not be accessed because its
> locked by another process or something (I cant get it to do it now -
> because I want it to crash...)
> Is there a way to check whether a file is locked by another process befre
> trying to save it? If it is locked is there a way to terminate the other
> process or somewhow free it up so that it can be saved?
>
> Thanks,
> Grant
>[/color]

[Grant]

Re: File lock problem

I can open the file ok and make modifications - its when I do the save bit
that it fails - is this where I would expect it to fail or when Im opening
the file?

Either way though Ill try open the file in a try catch block on a seperate
thread (now to learn how to do this on a seperate thread...)

Thanks for your help.

Grant

"CheshireCa t" <hah@notonyourn elly.coom> wrote in message
news:%237piHlcR FHA.3944@TK2MSF TNGP10.phx.gbl. ..[color=blue]
>I can't answer your specific question but if I try to open a file I use
>try/catch and usually loop the process over a short time period with some
>thread.sleep(0 ) thrown in.
>
>[/color]

[Grant]

Re: File lock problem

I can open the file ok and make modifications - its when I do the save bit
that it fails - is this where I would expect it to fail or when Im opening
the file?

Either way though Ill try open the file in a try catch block on a seperate
thread (now to learn how to do this on a seperate thread...)

Thanks for your help.

Grant

"CheshireCa t" <hah@notonyourn elly.coom> wrote in message
news:%237piHlcR FHA.3944@TK2MSF TNGP10.phx.gbl. ..[color=blue]
>I can't answer your specific question but if I try to open a file I use
>try/catch and usually loop the process over a short time period with some
>thread.sleep(0 ) thrown in.
>
>[/color]

[Willy Denoyette [MVP]]

Re: File lock problem


"Grant" <gpsnett@hotmai l.com> wrote in message
news:OQOrlgdRFH A.204@TK2MSFTNG P15.phx.gbl...[color=blue]
>I can open the file ok and make modifications - its when I do the save bit
>that it fails - is this where I would expect it to fail or when Im opening
>the file?
>
> Either way though Ill try open the file in a try catch block on a seperate
> thread (now to learn how to do this on a seperate thread...)
>
> Thanks for your help.
>
> Grant[/color]

That means you still have your file open on the other thread, right?
If that's true, are you sure the file is opened for shared RW access?

Willy.

[Willy Denoyette [MVP]]

Re: File lock problem


"Grant" <gpsnett@hotmai l.com> wrote in message
news:OQOrlgdRFH A.204@TK2MSFTNG P15.phx.gbl...[color=blue]
>I can open the file ok and make modifications - its when I do the save bit
>that it fails - is this where I would expect it to fail or when Im opening
>the file?
>
> Either way though Ill try open the file in a try catch block on a seperate
> thread (now to learn how to do this on a seperate thread...)
>
> Thanks for your help.
>
> Grant[/color]

That means you still have your file open on the other thread, right?
If that's true, are you sure the file is opened for shared RW access?

Willy.

[Cor Ligthert]

Re: File lock problem

Grant,

What you ask has never been possible with any (regular) Microsoft OS.

It would be very nice when we could.

They have build themselves a special feature for that in Office.

Cor

[Grant]

Re: File lock problem

how do you get a return value from a seperate thread? Ive got this far but I
dont know how to check whether the update was a success or not..

Thread updaterThread = new Thread(new ThreadStart(upd ateSomething));
updaterThread.S tart();

Thanks,
Grant

"CheshireCa t" <hah@notonyourn elly.coom> wrote in message
news:%237piHlcR FHA.3944@TK2MSF TNGP10.phx.gbl. ..[color=blue]
>I can't answer your specific question but if I try to open a file I use
>try/catch and usually loop the process over a short time period with some
>thread.sleep(0 ) thrown in.
>
>[/color]