In C#, how can i find a file that matches this pattern?

Question

I have a bunch of files that look like this where he first 2 characters in the file represent the month (the year can be assumed):

C:\folder\01_File.cvs
C:\folder\02_File.cvs
C:\folder\03_File.cvs

I have the following code in C#:

for (int i = 1;i < 13; i++)
{
    if (File.Exists("C:\folder\" + i.ToString("00") + "_File.cvs"))
    {
        // do something
    }
}

this worked great but now the file name are changing to show "MMDD" in the filename so i am now getting something like this where the first 4 characters represent MMDD

C:\folder\0122_File.cvs
C:\folder\0212_File.cvs
C:\folder\0311_File.cvs

given I don't know (or really care about the day but I can't change the file names, I am trying to figure out the best way to continue to have my code work by either getting the file using some wildcard regex search or any other suggestion.

Does this : https://stackoverflow.com/a/1199275/115272 answer your question? — Jacob Seleznev, Mar 02 '20 at 02:11
`Directory.GetFiles(@"C:\folder", $"{i:00}??_File.cvs").Any()`? — juharr, Mar 02 '20 at 02:43
Does this answer your question? [file exists by file name pattern](https://stackoverflow.com/questions/1199260/file-exists-by-file-name-pattern) — subdeveloper, Mar 02 '20 at 05:09

drj · Answer 1 · 2020-03-03T02:53:42.890

0

You can do a pattern search for all the files ending in _File.cvs and then do your logic on each of the files

string[] files = System.IO.Directory.GetFiles(path, "*_File.cvs", 
System.IO.SearchOption.TopDirectoryOnly);
if (files.Length > 0)
{
    //file exist
}

edited Mar 03 '20 at 02:53

answered Mar 02 '20 at 03:55

drj

1
1

thank you but I still need a way to parse out the month from the file name – leora Mar 07 '20 at 12:04

In C#, how can i find a file that matches this pattern?

1 Answers1