Search file in Directory using partial name in C#

Question

I need to search file in directory using partial name.

Ex:

Directory : c:\Path
Filename  : Error_005296-895632-12563.xml
Partial file name: 005296-895632-12563

I have tried below.

Directory.GetFiles("c:\Path", "*005296-895632-12563*.xml", SearchOption.AllDirectories).

But it didn't work

Sample file names are :

Error_005296-895632-12563.xml
005296-895632-12563_Response.xml
Duplicate_005296-895632-12563_Response.xml

https://stackoverflow.com/questions/8443524/using-directory-getfiles-with-a-regex-in-c may help — , Aug 04 '17 at 14:03
Possible duplicate: https://stackoverflow.com/questions/1601241/c-sharp-regex-matching-file-names-according-to-a-specific-naming-pattern — Matt Evans, Aug 04 '17 at 14:03
You don't even need regexes or patterns, just loop over the filenames in the directory and use `string.Contains` — millimoose, Aug 04 '17 at 14:08
Answers will differ by language. Please select either c# or vb.net — djv, Aug 04 '17 at 14:50

score 1 · Answer 1 · answered Aug 04 '17 at 14:35

You can create a extension method and pass the array of partial names which you want to find.

Call the extension method like this

DirectoryInfo dir = new DirectoryInfo(@"c:\demo");

FileInfo[] files = dir.GetFilesBypartialName("Anc_def_", "ABC_123", "12_qweqweqw_123").ToArray();

below is the extension method

public static class DirectoryFindFile
{
    public static IEnumerable<FileInfo> GetFilesBypartialName(this DirectoryInfo dirInfo, params string[] partialFilenames)
    {
        if (partialFilenames == null)
            throw new ArgumentNullException("partialFilenames");

        var lstpartialFilenames = new HashSet<string>(partialFilenames, StringComparer.OrdinalIgnoreCase);

        return dirInfo.EnumerateFiles()
            .Where(f => lstpartialFilenames.Contains(f.Name));
    }

    public static IEnumerable<FileInfo> GetFilesBypartialFilenamesAllDir(this DirectoryInfo dirInfo, params string[] partialFilenames)
    {
        if (partialFilenames == null)
            throw new ArgumentNullException("partialFilenames");

        var lstpartialFilenames = new HashSet<string>(partialFilenames, StringComparer.OrdinalIgnoreCase);

        return dirInfo.EnumerateFiles("*.*", SearchOption.AllDirectories)
                       .Where(f => lstpartialFilenames.Contains(f.Name));
    }
}

score 0 · Answer 2 · answered Aug 04 '17 at 14:25

Heres a extension function I've used to search directories

public static IEnumerable<string> GetFiles(string path, string searchPatternExpression = "", SearchOption searchOption =    SearchOption.AllDirectories)
{

    Regex reSearchPattern = new Regex(searchPatternExpression);

    return Directory.EnumerateFiles(path, "*", searchOption).Where(file => reSearchPattern.IsMatch(System.IO.Path.GetExtension(file)));
 }

Search file in Directory using partial name in C#

2 Answers2