FileSystemWatcher

[jlea]

I'm trying to watch a file from my XP-Pro workstation to either a Win2000 or
a NT4 machine and everytime I try to set the path property to something such
as \\PDC1\cdrive\ I get a system.nullExce ption error.

Anyone have any ideas? Does this work? It works just fine on my local
machine: "c:\abc\def \"

Thanks. Jon Lea

[Michael Giagnocavo [MVP]]

Re: FileSystemWatch er

First question: Do you have permissions to that share?

Second: please post the full exception and stack trace along with a small
bit of code.

Thanks,
-mike
MVP

"jlea" <jon@leapsoft.c om> wrote in message
news:OptvZHLqDH A.3180@TK2MSFTN GP11.phx.gbl...[color=blue]
> I'm trying to watch a file from my XP-Pro workstation to either a Win2000[/color]
or[color=blue]
> a NT4 machine and everytime I try to set the path property to something[/color]
such[color=blue]
> as \\PDC1\cdrive\ I get a system.nullExce ption error.
>
> Anyone have any ideas? Does this work? It works just fine on my local
> machine: "c:\abc\def \"
>
> Thanks. Jon Lea
>
>[/color]

[jlea]

Re: FileSystemWatch er

Thanks for the reply. I have permission to the share: I'm able to save a
file to that share from within Word. I'm using the following code:

void FileWatcher::Se tFile(String* fullPathName)

{

FileInfo* fi = new FileInfo(fullPa thName);

m_watcher->Path = fi->DirectoryNam e;

m_watcher->EnableRaisingE vents = true;

m_watcher->Filter = fi->Name;

}


and the exact exception is:

A "System.NullRef erenceException " occured.
Object reference not set to an instance of an object.

and it occurs on this line:

m_watcher->Path = fi->DirectoryNam e;

and fi->DirectoryNam e returns \\Pdc1\cdrive\.

I was doing some searching on the net about the FileSystemWatch er and found
this link:

http://msdn.microsoft.com/library/de...t4machines.asp

It sounds like FileSystemWatch er has a few problems with network file
watching.

Thanks again and let me know what you think. Jon.


"Michael Giagnocavo [MVP]" <mggUNSPAM@Atre vido.net> wrote in message
news:%234jR8RNq DHA.2488@TK2MSF TNGP12.phx.gbl. ..[color=blue]
> First question: Do you have permissions to that share?
>
> Second: please post the full exception and stack trace along with a small
> bit of code.
>
> Thanks,
> -mike
> MVP
>
> "jlea" <jon@leapsoft.c om> wrote in message
> news:OptvZHLqDH A.3180@TK2MSFTN GP11.phx.gbl...[color=green]
> > I'm trying to watch a file from my XP-Pro workstation to either a[/color][/color]
Win2000[color=blue]
> or[color=green]
> > a NT4 machine and everytime I try to set the path property to something[/color]
> such[color=green]
> > as \\PDC1\cdrive\ I get a system.nullExce ption error.
> >
> > Anyone have any ideas? Does this work? It works just fine on my local
> > machine: "c:\abc\def \"
> >
> > Thanks. Jon Lea
> >
> >[/color]
>
>[/color]

[Michael Giagnocavo [MVP]]

Re: FileSystemWatch er

What's the full stack trace? And to test, don't use NT4.
-mike
MVP

"jlea" <jon@leapsoft.c om> wrote in message
news:%23k4LFZTq DHA.2000@TK2MSF TNGP10.phx.gbl. ..[color=blue]
> Thanks for the reply. I have permission to the share: I'm able to save a
> file to that share from within Word. I'm using the following code:
>
> void FileWatcher::Se tFile(String* fullPathName)
>
> {
>
> FileInfo* fi = new FileInfo(fullPa thName);
>
> m_watcher->Path = fi->DirectoryNam e;
>
> m_watcher->EnableRaisingE vents = true;
>
> m_watcher->Filter = fi->Name;
>
> }
>
>
> and the exact exception is:
>
> A "System.NullRef erenceException " occured.
> Object reference not set to an instance of an object.
>
> and it occurs on this line:
>
> m_watcher->Path = fi->DirectoryNam e;
>
> and fi->DirectoryNam e returns \\Pdc1\cdrive\.
>
> I was doing some searching on the net about the FileSystemWatch er and[/color]
found[color=blue]
> this link:
>
>[/color]
http://msdn.microsoft.com/library/de...t4machines.asp[color=blue]
>
> It sounds like FileSystemWatch er has a few problems with network file
> watching.
>
> Thanks again and let me know what you think. Jon.
>
>
> "Michael Giagnocavo [MVP]" <mggUNSPAM@Atre vido.net> wrote in message
> news:%234jR8RNq DHA.2488@TK2MSF TNGP12.phx.gbl. ..[color=green]
> > First question: Do you have permissions to that share?
> >
> > Second: please post the full exception and stack trace along with a[/color][/color]
small[color=blue][color=green]
> > bit of code.
> >
> > Thanks,
> > -mike
> > MVP
> >
> > "jlea" <jon@leapsoft.c om> wrote in message
> > news:OptvZHLqDH A.3180@TK2MSFTN GP11.phx.gbl...[color=darkred]
> > > I'm trying to watch a file from my XP-Pro workstation to either a[/color][/color]
> Win2000[color=green]
> > or[color=darkred]
> > > a NT4 machine and everytime I try to set the path property to[/color][/color][/color]
something[color=blue][color=green]
> > such[color=darkred]
> > > as \\PDC1\cdrive\ I get a system.nullExce ption error.
> > >
> > > Anyone have any ideas? Does this work? It works just fine on my local
> > > machine: "c:\abc\def \"
> > >
> > > Thanks. Jon Lea
> > >
> > >[/color]
> >
> >[/color]
>
>[/color]

[jlea]

Re: FileSystemWatch er

Michael - I think I've solved my problem - its amazing what a day makes.
Apparently the FileInfo class drops the last "\" on network files and has it
for local drives. I added some code to make sure the last "\" is on the
directory name before asssigning it to the path property and things seem to
work now. So I can use my XP-Pro workstation to watch files on the NT4
server and also on another Win2000 workstation. I'm in the process of
testing it with a Win2000 workstation going to the NT4 server.

Thanks for the help. Jon.


"Michael Giagnocavo [MVP]" <mggUNSPAM@Atre vido.net> wrote in message
news:OyMOV%23Tq DHA.1324@TK2MSF TNGP09.phx.gbl. ..[color=blue]
> What's the full stack trace? And to test, don't use NT4.
> -mike
> MVP
>
> "jlea" <jon@leapsoft.c om> wrote in message
> news:%23k4LFZTq DHA.2000@TK2MSF TNGP10.phx.gbl. ..[color=green]
> > Thanks for the reply. I have permission to the share: I'm able to save[/color][/color]
a[color=blue][color=green]
> > file to that share from within Word. I'm using the following code:
> >
> > void FileWatcher::Se tFile(String* fullPathName)
> >
> > {
> >
> > FileInfo* fi = new FileInfo(fullPa thName);
> >
> > m_watcher->Path = fi->DirectoryNam e;
> >
> > m_watcher->EnableRaisingE vents = true;
> >
> > m_watcher->Filter = fi->Name;
> >
> > }
> >
> >
> > and the exact exception is:
> >
> > A "System.NullRef erenceException " occured.
> > Object reference not set to an instance of an object.
> >
> > and it occurs on this line:
> >
> > m_watcher->Path = fi->DirectoryNam e;
> >
> > and fi->DirectoryNam e returns \\Pdc1\cdrive\.
> >
> > I was doing some searching on the net about the FileSystemWatch er and[/color]
> found[color=green]
> > this link:
> >
> >[/color]
>[/color]
http://msdn.microsoft.com/library/de...t4machines.asp[color=blue][color=green]
> >
> > It sounds like FileSystemWatch er has a few problems with network file
> > watching.
> >
> > Thanks again and let me know what you think. Jon.
> >
> >
> > "Michael Giagnocavo [MVP]" <mggUNSPAM@Atre vido.net> wrote in message
> > news:%234jR8RNq DHA.2488@TK2MSF TNGP12.phx.gbl. ..[color=darkred]
> > > First question: Do you have permissions to that share?
> > >
> > > Second: please post the full exception and stack trace along with a[/color][/color]
> small[color=green][color=darkred]
> > > bit of code.
> > >
> > > Thanks,
> > > -mike
> > > MVP
> > >
> > > "jlea" <jon@leapsoft.c om> wrote in message
> > > news:OptvZHLqDH A.3180@TK2MSFTN GP11.phx.gbl...
> > > > I'm trying to watch a file from my XP-Pro workstation to either a[/color]
> > Win2000[color=darkred]
> > > or
> > > > a NT4 machine and everytime I try to set the path property to[/color][/color]
> something[color=green][color=darkred]
> > > such
> > > > as \\PDC1\cdrive\ I get a system.nullExce ption error.
> > > >
> > > > Anyone have any ideas? Does this work? It works just fine on my[/color][/color][/color]
local[color=blue][color=green][color=darkred]
> > > > machine: "c:\abc\def \"
> > > >
> > > > Thanks. Jon Lea
> > > >
> > > >
> > >
> > >[/color]
> >
> >[/color]
>
>[/color]

[Michael Giagnocavo [MVP]]

Re: FileSystemWatch er

Great find, let me check into this.

Thanks,
-mike
MVP


"jlea" <jon@leapsoft.c om> wrote in message
news:%23mfK9QUq DHA.1444@tk2msf tngp13.phx.gbl. ..[color=blue]
> Michael - I think I've solved my problem - its amazing what a day makes.
> Apparently the FileInfo class drops the last "\" on network files and has[/color]
it[color=blue]
> for local drives. I added some code to make sure the last "\" is on the
> directory name before asssigning it to the path property and things seem[/color]
to[color=blue]
> work now. So I can use my XP-Pro workstation to watch files on the NT4
> server and also on another Win2000 workstation. I'm in the process of
> testing it with a Win2000 workstation going to the NT4 server.
>
> Thanks for the help. Jon.
>
>
> "Michael Giagnocavo [MVP]" <mggUNSPAM@Atre vido.net> wrote in message
> news:OyMOV%23Tq DHA.1324@TK2MSF TNGP09.phx.gbl. ..[color=green]
> > What's the full stack trace? And to test, don't use NT4.
> > -mike
> > MVP
> >
> > "jlea" <jon@leapsoft.c om> wrote in message
> > news:%23k4LFZTq DHA.2000@TK2MSF TNGP10.phx.gbl. ..[color=darkred]
> > > Thanks for the reply. I have permission to the share: I'm able to[/color][/color][/color]
save[color=blue]
> a[color=green][color=darkred]
> > > file to that share from within Word. I'm using the following code:
> > >
> > > void FileWatcher::Se tFile(String* fullPathName)
> > >
> > > {
> > >
> > > FileInfo* fi = new FileInfo(fullPa thName);
> > >
> > > m_watcher->Path = fi->DirectoryNam e;
> > >
> > > m_watcher->EnableRaisingE vents = true;
> > >
> > > m_watcher->Filter = fi->Name;
> > >
> > > }
> > >
> > >
> > > and the exact exception is:
> > >
> > > A "System.NullRef erenceException " occured.
> > > Object reference not set to an instance of an object.
> > >
> > > and it occurs on this line:
> > >
> > > m_watcher->Path = fi->DirectoryNam e;
> > >
> > > and fi->DirectoryNam e returns \\Pdc1\cdrive\.
> > >
> > > I was doing some searching on the net about the FileSystemWatch er and[/color]
> > found[color=darkred]
> > > this link:
> > >
> > >[/color]
> >[/color]
>[/color]
http://msdn.microsoft.com/library/de...t4machines.asp[color=blue][color=green][color=darkred]
> > >
> > > It sounds like FileSystemWatch er has a few problems with network file
> > > watching.
> > >
> > > Thanks again and let me know what you think. Jon.
> > >
> > >
> > > "Michael Giagnocavo [MVP]" <mggUNSPAM@Atre vido.net> wrote in message
> > > news:%234jR8RNq DHA.2488@TK2MSF TNGP12.phx.gbl. ..
> > > > First question: Do you have permissions to that share?
> > > >
> > > > Second: please post the full exception and stack trace along with a[/color]
> > small[color=darkred]
> > > > bit of code.
> > > >
> > > > Thanks,
> > > > -mike
> > > > MVP
> > > >
> > > > "jlea" <jon@leapsoft.c om> wrote in message
> > > > news:OptvZHLqDH A.3180@TK2MSFTN GP11.phx.gbl...
> > > > > I'm trying to watch a file from my XP-Pro workstation to either a
> > > Win2000
> > > > or
> > > > > a NT4 machine and everytime I try to set the path property to[/color]
> > something[color=darkred]
> > > > such
> > > > > as \\PDC1\cdrive\ I get a system.nullExce ption error.
> > > > >
> > > > > Anyone have any ideas? Does this work? It works just fine on my[/color][/color]
> local[color=green][color=darkred]
> > > > > machine: "c:\abc\def \"
> > > > >
> > > > > Thanks. Jon Lea
> > > > >
> > > > >
> > > >
> > > >
> > >
> > >[/color]
> >
> >[/color]
>
>[/color]

[jlea]

Re: FileSystemWatch er

I had also made some other changes in my attempt to fix things up when I
stumbled upon this so I don't know if this was the only/real culprit. A
colleague of mine here said he had seen the same behavior with FileInfo so
he wasn't surprised to hear it. Let me know what you find. Jon.

"Michael Giagnocavo [MVP]" <mggUNSPAM@Atre vido.net> wrote in message
news:OWCScQgqDH A.1632@TK2MSFTN GP10.phx.gbl...[color=blue]
> Great find, let me check into this.
>
> Thanks,
> -mike
> MVP
>
>
> "jlea" <jon@leapsoft.c om> wrote in message
> news:%23mfK9QUq DHA.1444@tk2msf tngp13.phx.gbl. ..[color=green]
> > Michael - I think I've solved my problem - its amazing what a day makes.
> > Apparently the FileInfo class drops the last "\" on network files and[/color][/color]
has[color=blue]
> it[color=green]
> > for local drives. I added some code to make sure the last "\" is on the
> > directory name before asssigning it to the path property and things seem[/color]
> to[color=green]
> > work now. So I can use my XP-Pro workstation to watch files on the NT4
> > server and also on another Win2000 workstation. I'm in the process of
> > testing it with a Win2000 workstation going to the NT4 server.
> >
> > Thanks for the help. Jon.
> >
> >
> > "Michael Giagnocavo [MVP]" <mggUNSPAM@Atre vido.net> wrote in message
> > news:OyMOV%23Tq DHA.1324@TK2MSF TNGP09.phx.gbl. ..[color=darkred]
> > > What's the full stack trace? And to test, don't use NT4.
> > > -mike
> > > MVP
> > >
> > > "jlea" <jon@leapsoft.c om> wrote in message
> > > news:%23k4LFZTq DHA.2000@TK2MSF TNGP10.phx.gbl. ..
> > > > Thanks for the reply. I have permission to the share: I'm able to[/color][/color]
> save[color=green]
> > a[color=darkred]
> > > > file to that share from within Word. I'm using the following code:
> > > >
> > > > void FileWatcher::Se tFile(String* fullPathName)
> > > >
> > > > {
> > > >
> > > > FileInfo* fi = new FileInfo(fullPa thName);
> > > >
> > > > m_watcher->Path = fi->DirectoryNam e;
> > > >
> > > > m_watcher->EnableRaisingE vents = true;
> > > >
> > > > m_watcher->Filter = fi->Name;
> > > >
> > > > }
> > > >
> > > >
> > > > and the exact exception is:
> > > >
> > > > A "System.NullRef erenceException " occured.
> > > > Object reference not set to an instance of an object.
> > > >
> > > > and it occurs on this line:
> > > >
> > > > m_watcher->Path = fi->DirectoryNam e;
> > > >
> > > > and fi->DirectoryNam e returns \\Pdc1\cdrive\.
> > > >
> > > > I was doing some searching on the net about the FileSystemWatch er[/color][/color][/color]
and[color=blue][color=green][color=darkred]
> > > found
> > > > this link:
> > > >
> > > >
> > >[/color]
> >[/color]
>[/color]
http://msdn.microsoft.com/library/de...t4machines.asp[color=blue][color=green][color=darkred]
> > > >
> > > > It sounds like FileSystemWatch er has a few problems with network[/color][/color][/color]
file[color=blue][color=green][color=darkred]
> > > > watching.
> > > >
> > > > Thanks again and let me know what you think. Jon.
> > > >
> > > >
> > > > "Michael Giagnocavo [MVP]" <mggUNSPAM@Atre vido.net> wrote in message
> > > > news:%234jR8RNq DHA.2488@TK2MSF TNGP12.phx.gbl. ..
> > > > > First question: Do you have permissions to that share?
> > > > >
> > > > > Second: please post the full exception and stack trace along with[/color][/color][/color]
a[color=blue][color=green][color=darkred]
> > > small
> > > > > bit of code.
> > > > >
> > > > > Thanks,
> > > > > -mike
> > > > > MVP
> > > > >
> > > > > "jlea" <jon@leapsoft.c om> wrote in message
> > > > > news:OptvZHLqDH A.3180@TK2MSFTN GP11.phx.gbl...
> > > > > > I'm trying to watch a file from my XP-Pro workstation to either[/color][/color][/color]
a[color=blue][color=green][color=darkred]
> > > > Win2000
> > > > > or
> > > > > > a NT4 machine and everytime I try to set the path property to
> > > something
> > > > > such
> > > > > > as \\PDC1\cdrive\ I get a system.nullExce ption error.
> > > > > >
> > > > > > Anyone have any ideas? Does this work? It works just fine on my[/color]
> > local[color=darkred]
> > > > > > machine: "c:\abc\def \"
> > > > > >
> > > > > > Thanks. Jon Lea
> > > > > >
> > > > > >
> > > > >
> > > > >
> > > >
> > > >
> > >
> > >[/color]
> >
> >[/color]
>
>[/color]