How do I check if a filename matches a wildcard pattern

Question

I\'ve got a wildcard pattern, perhaps \"*.txt\" or \"POS??.dat\".

I also have list of filenames in memory that I need to compare to that pattern.

How would

Answer 1

Just call the Windows API function PathMatchSpecExW().

[Flags]
public enum MatchPatternFlags : uint
{
    Normal          = 0x00000000,   // PMSF_NORMAL
    Multiple        = 0x00000001,   // PMSF_MULTIPLE
    DontStripSpaces = 0x00010000    // PMSF_DONT_STRIP_SPACES
}

class FileName
{
    [DllImport("Shlwapi.dll", SetLastError = false)]
    static extern int PathMatchSpecExW([MarshalAs(UnmanagedType.LPWStr)] string file,
                                       [MarshalAs(UnmanagedType.LPWStr)] string spec,
                                       MatchPatternFlags flags);

    /*******************************************************************************
    * Function:     MatchPattern
    *
    * Description:  Matches a file name against one or more file name patterns.
    *
    * Arguments:    file - File name to check
    *               spec - Name pattern(s) to search foe
    *               flags - Flags to modify search condition (MatchPatternFlags)
    *
    * Return value: Returns true if name matches the pattern.
    *******************************************************************************/

    public static bool MatchPattern(string file, string spec, MatchPatternFlags flags)
    {
        if (String.IsNullOrEmpty(file))
            return false;

        if (String.IsNullOrEmpty(spec))
            return true;

        int result = PathMatchSpecExW(file, spec, flags);

        return (result == 0);
    }
}