[RESOLVED] Querying a list of FileInfo for a filename

I am using the code below to get a list of files from multiple folder paths. Now I want to query that list to see if a specified file name exists. I don't want to loop through the list one file at a time, but rather use something like LINQ, but I'm not sure how to do it. I'm hoping someone can help me out. Thanks...

Code:

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        Dim allFiles As New List(Of IO.FileInfo)
        Dim files As IO.FileInfo()

        files = New IO.DirectoryInfo(folderPath1).GetFiles("*")
        allFiles.AddRange(files)

        files = New IO.DirectoryInfo(folderPath2).GetFiles("*")
        allFiles.AddRange(files)

        files = New IO.DirectoryInfo(folderPath3).GetFiles("*", IO.SearchOption.AllDirectories)
        allFiles.AddRange(files)

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Can we assume that it does not matter what path the file name is in, or if it is in more than one path?

Possibly useful links:

https://learn.microsoft.com/en-us/do...s?view=net-8.0

https://www.codeproject.com/Question...ist-using-linq

Quote:

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Originally Posted by jdc2000

Can we assume that it does not matter what path the file name is in, or if it is in more than one path?

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That is correct, path doesn't matter, and there should only be 1 copy of a file.

You want LINQ's FirstOrDefault for this:-

Code:

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        'Name of file to find
        Dim findFile As String = "target.txt"

        'The first match found would be assigned to this variable. Nothing is assigned
        'if no matches were found.
        Dim foundFile As FileInfo = allfiles.FirstOrDefault(Function(f) f.Name.ToLower = findFile)

        'If a match was not found then 'foundFile' would be Nothing...
        If foundFile IsNot Nothing Then
            Debug.WriteLine($"{foundFile.FullName}, Size = {foundFile.Length.ToString}")
        End If


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Niya, thank you, that worked perfectly...