How do I resolve the filename, directory name, or volume label syntax is incorrect

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Hi All

I have a C#/Selenium automation test which while running needs to read the contents of xlxs file.

What I have tried:

The link to the file is ->

href = "blob:https://www.xxxxxx.co.uk/c7a70bf0-7495-48f8-b989-be0035eb79fd"

And when I try this

using var stream = File.OpenRead(@href);

I get the following error

System.IO.IOException: 'The filename, directory name, or volume label syntax is incorrect. : 'C:\KevsTest\Debug\net6.0\blob:https:\www.xxxxxx.co.uk\c7a70bf0-7495-48f8-b989-be0035eb79fd''

for some reason

C:\KevsTest\Debug\net6.0\

is being pre-pended to the link. Can anyone assist with this please?

Posted 20-Jun-23 4:50am

kevsbox

Updated 20-Jun-23 8:20am

Richard Deeming

v2

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Richard MacCutchan 20-Jun-23 11:26am

Most likely because the href is being read as a relative path, so it prpends the current working directory. However the actual reference you show does not look like a path to an Excel file.

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Dave Kreskowiak · Answer 1 · 2023-06-20T06:45:00

You're getting the error because it think's you're specifying an invalid drive letter. Look at the path you told it to open:

C:\KevsTest\Debug\net6.0\blob:https:\www.xxxxxx.co.uk\c7a70bf0-7495-48f8-b989-be0035eb79fd

There can only ever be a single colon in the path, with a single character before it, specifying the drive letter. You have two colons.

The next problem is you cannot use the File class to open a "file" returned by a URL. You have to use the WebClient class to download the file, then you can open the local copy of the file.
WebClient.DownloadFile Method (System.Net) | Microsoft Learn[^]