FileSystemWatcher: how to make it accept multiple file extensions?

[IlyaRabyy]

Colleagues,
I need to monitor files of more than one type (e.g. XML, TXT, etc.)
I looked up FileSystemWatcher.Filters property - it's read only.
This is what I have:

What am I doing wrong?


Regards,

Ilya

 

[mikrom]

As stated in the documentation: [highlight #FCE94F]Use of multiple filters such as "*.txt|*.doc" is not supported.[/highlight]

 

[IlyaRabyy]

Right, not supported.
Any tip on how to get around this restriction?

Regards,

Ilya

 

[mikrom]

But .. it seems to work - because besides the Filter Property it also has [highlight #FCE94F]Filters[/highlight] property, which is collection of filters:

https://learn.microsoft.com/en-us/dotnet/api/system.io.filesystemwatcher.filters?view=net-8.0

To try it out, i took this example from documetation:

https://learn.microsoft.com/en-us/d...dfrom=MSDN#System_IO_FileSystemWatcher_Filter

It has the setting to watch only TXT-files

...
watcher.Filter = "*.txt"
...

so i tried it how it works, and really - it watched in my directory only TXT files

Then i changed the code commenting out the Filter property and setting the [highlight #FCE94F]Filters[/highlight] property, i.e. adding 2 filters into the collection

...
'watcher.Filter = "*.txt"
watcher.Filters.Add("*.txt")
watcher.Filters.Add("*.log")

And now it works - it watches in my directory TXT and LOG files.

 

[strongm]

Ah, I was just about to say that some of the documentation is ... misleading, and mention that as of .Net Core 3.x and .Net 5 you can use Filters.Add method - but mikrom got in there first

 

[IlyaRabyy]

That'd be fine and dandy, but the problem is that in .NET Framework 4.8

I opened the Project Properties tab and selected "Install other frameworks; that took me there:

https://dotnet.microsoft.com/en-us/download/dotnet/8.0

I dunno which ver. 8 files to select... Any hints? (Win 11, Lenovo/Intel, 64)

Regards,

Ilya

 

[mikrom]

I dunno which ver. 8 files to select... Any hints?

SDK 8.0.303