How to determine if a File Matches a File Mask?

Question

I need to decide whether file name fits to file mask. The file mask could contain * or ? characters. Is there any simple solution for this?

bool bFits = Fits         


        

Answer 1

From Windows 7 using P/Invoke (without 260 char count limit):

// UNICODE_STRING for Rtl... method
[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
public struct UNICODE_STRING
{
    public ushort Length;
    public ushort MaximumLength;
    [MarshalAs(UnmanagedType.LPWStr)]
    string Buffer;

    public UNICODE_STRING(string buffer)
    {
        if (buffer == null)
            Length = MaximumLength = 0;
        else
            Length = MaximumLength = unchecked((ushort)(buffer.Length * 2));
        Buffer = buffer;
    }
}

// RtlIsNameInExpression method from NtDll.dll system library
public static class NtDll
{
    [DllImport("NtDll.dll", CharSet=CharSet.Unicode, ExactSpelling=true)]
    [return: MarshalAs(UnmanagedType.U1)]
    public extern static bool RtlIsNameInExpression(
        ref UNICODE_STRING Expression,
        ref UNICODE_STRING Name,
        [MarshalAs(UnmanagedType.U1)]
        bool IgnoreCase,
        IntPtr Zero
        );
}

public bool MatchMask(string mask, string fileName)
{
    // Expression must be uppercase for IgnoreCase == true (see MSDN for RtlIsNameInExpression)
    UNICODE_STRING expr = new UNICODE_STRING(mask.ToUpper());
    UNICODE_STRING name = new UNICODE_STRING(fileName);

    if (NtDll.RtlIsNameInExpression(ref expr, ref name, true, IntPtr.Zero))
    {
        // MATCHES !!!
    }
}