How to check if filename contains substring in C#

I have a folder with files named

1. myfileone
2. myfiletwo
3. myfilethree

How can I check if file "myfilethree" is present.

I mean is there another method other than IsFileExist(开发者_StackOverflow社区) method, i.e like filename contains substring "three"?

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Substring:

bool contains  = Directory.EnumerateFiles(path).Any(f => f.Contains("three"));

Case-insensitive substring:

bool contains  = Directory.EnumerateFiles(path).Any(f => f.IndexOf("three", StringComparison.OrdinalIgnoreCase) > 0);

Case-insensitive comparison:

bool contains  = Directory.EnumerateFiles(path).Any(f => String.Equals(f, "myfilethree", StringComparison.OrdinalIgnoreCase));

Get file names matching a wildcard criteria:

IEnumerable<string> files = Directory.EnumerateFiles(path, "three*.*"); // lazy file system lookup

string[] files = Directory.GetFiles(path, "three*.*"); // not lazy

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If I understand your question correctly, you could do something like

Directory.GetFiles(directoryPath, "*three*")

or

Directory.GetFiles(directoryPath).Where(f => f.Contains("three"))

Both of these will give you all the names of all files with three in it.

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I am not that familiar with IO but maybe this would work ? Requires using System.Linq

System.IO.Directory.GetFiles("PATH").Where(s => s.Contains("three"));

EDIT: Note that this returns array of strings.