Is there a way to lock records and/or files in multi user application, using
C#?
Adrian.
5  3942 
Hi,
Depending of what you want to lock you use one or other mechanism, for a
file could be as simple as open it as exclusive.
Don't know what kind of records you mean.
You can use Mutex to generate a lock in the local machine, but if your app
is used in more than one machine it does not work.
--
--
Ignacio Machin,
ignacio.machin AT dot.state.fl.us
Florida Department Of Transportation
"Adrian" <00@00.00wrot e in message
news:44******** ************@dr eader2.news.tis cali.nl...
Is there a way to lock records and/or files in multi user application,
using
C#?
Adrian.
Yes .. the filestream class supports these operations .. I would highly
recommend not creating a mutex for every item as ignacio mentions. http://msdn2.microsoft.com/en-us/lib...ream.lock.aspx
note that this lock is a write lock
for locking the entire file it just matters how you open it (whether shared
or unshared) ..
Cheers,
Greg Young
MVP - C# http://codebetter.com/blogs/gregyoung
"Adrian" <00@00.00wrot e in message
news:44******** ************@dr eader2.news.tis cali.nl...
Is there a way to lock records and/or files in multi user application,
using
C#?
Adrian.
Thanks.
So there is no simple locking / unlocking of files.
Supposing file B is being used by several users;
a file A is created when file B is opened.
If another user wants to use file B, when file
A exists, he will be kept waiting in a loop
until file A is deleted when the other user
exits file B.
Is this a feasible solution?
Adrian.
"Greg Young" <dr************ *******@hotmail .comwrote in message
news:ug******** ******@TK2MSFTN GP02.phx.gbl...
Yes .. the filestream class supports these operations .. I would highly
recommend not creating a mutex for every item as ignacio mentions.
http://msdn2.microsoft.com/en-us/lib...ream.lock.aspx
note that this lock is a write lock
for locking the entire file it just matters how you open it (whether
shared
or unshared) ..
Cheers,
Greg Young
MVP - C#
http://codebetter.com/blogs/gregyoung
"Adrian" <00@00.00wrot e in message
news:44******** ************@dr eader2.news.tis cali.nl...
Is there a way to lock records and/or files in multi user application,
using
C#?
Adrian.
No there is simple locking / unlocking
Just open it as exclusive read (others will get an error trying to open it).
Take a look at FileShare http://msdn2.microsoft.com/en-us/lib...fileshare.aspx. You can
pass this when you open a file.
Cheers,
Greg
"Adrian" <00@00.00wrot e in message
news:44******** ************@dr eader2.news.tis cali.nl...
Thanks.
So there is no simple locking / unlocking of files.
Supposing file B is being used by several users;
a file A is created when file B is opened.
If another user wants to use file B, when file
A exists, he will be kept waiting in a loop
until file A is deleted when the other user
exits file B.
Is this a feasible solution?
Adrian.
"Greg Young" <dr************ *******@hotmail .comwrote in message
news:ug******** ******@TK2MSFTN GP02.phx.gbl...
>Yes .. the filestream class supports these operations .. I would highly
recommend not creating a mutex for every item as ignacio mentions.
http://msdn2.microsoft.com/en-us/lib...ream.lock.aspx
note that this lock is a write lock
for locking the entire file it just matters how you open it (whether
shared
>or unshared) ..
Cheers,
Greg Young
MVP - C#
http://codebetter.com/blogs/gregyoung
"Adrian" <00@00.00wrot e in message
news:44******* *************@d reader2.news.ti scali.nl...
Is there a way to lock records and/or files in multi user application,
using
C#?
Adrian.
Excellent.
Thank you.
Adrian.
"Greg Young" <dr************ *******@hotmail .comwrote in message
news:eT******** ******@TK2MSFTN GP04.phx.gbl...
No there is simple locking / unlocking
Just open it as exclusive read (others will get an error trying to open
it).
>
Take a look at FileShare
http://msdn2.microsoft.com/en-us/lib...fileshare.aspx. You can
pass this when you open a file.
Cheers,
Greg
"Adrian" <00@00.00wrot e in message
news:44******** ************@dr eader2.news.tis cali.nl...
Thanks.
So there is no simple locking / unlocking of files.
Supposing file B is being used by several users;
a file A is created when file B is opened.
If another user wants to use file B, when file
A exists, he will be kept waiting in a loop
until file A is deleted when the other user
exits file B.
Is this a feasible solution?
Adrian.
"Greg Young" <dr************ *******@hotmail .comwrote in message
news:ug******** ******@TK2MSFTN GP02.phx.gbl...
Yes .. the filestream class supports these operations .. I would highly
recommend not creating a mutex for every item as ignacio mentions.
http://msdn2.microsoft.com/en-us/lib...ream.lock.aspx
note that this lock is a write lock
for locking the entire file it just matters how you open it (whether
shared
or unshared) ..
Cheers,
Greg Young
MVP - C#
http://codebetter.com/blogs/gregyoung
"Adrian" <00@00.00wrot e in message
news:44******** ************@dr eader2.news.tis cali.nl...
Is there a way to lock records and/or files in multi user
application,
using
C#?
Adrian.
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