How To Read a File that Already used by another Process

If you have access to the source of the other application you can set it's file open to something like:

FileStream writer = new FileStream("C:\theFile", FileMode.Open, FileAccess.Write, FileShare.Read);

Then you can open the file using:

FileStream reader = new FileStream("C:\theFile", FileMode.Open, FileAccess.Read, FileShare.ReadWrite);

Note that you can always try to open the file in read only mode, if you succeed also depends on how nice the initial user of the file is.

If this doesn't do it for you, you need to sort out who is holding the file. If you know that, you're one step closer to the solution.
you can use Handle[^] to find the application.

Depending on what you find you can take the appropriate action; if it turns out that your own applicaiton already has a handle to the file you might be just have multiple threads doing the same... really the same :).

Cheers, AT

Hi,

You can try this.

FileStream fs = new FileStream(@"<file path>", FileMode.Open, FileAccess.Read, FileShare.Read);

So <file path=""> should be file that you want to access.

then should be able to use "fs" object as you want.

Regards.

be sure that you have permission on doing that

hope it helps!

have a smile :)