/// <summary>
/// Recursively enumerate all files in all subdirectories in the target directory.
/// </summary>
/// <remarks>
/// This implementation does not keep field handles option during recursive calls or yield operations.
/// </remarks>
/// <param name="target"></param>
/// <param name="searchPattern"></param>
/// <returns></returns>
public static IEnumerable <FileInfo> EnumerateAllFiles(this DirectoryInfo target, string searchPattern)
{
var searchPath = Path.Combine(target.FullName, searchPattern);
NativeWin32.WIN32_FIND_DATA findData;
var folders = new List <string>();
var files = new List <string>();
using (var hFindFile = NativeWin32.FindFirstFile(searchPath, out findData))
{
do
{
if (hFindFile.IsInvalid)
{
continue;
}
if (findData.cFileName == "." || findData.cFileName == "..")
{
continue;
}
if (findData.dwFileAttributes.HasFlag(FileAttributes.Directory))
{
folders.Add(Path.Combine(target.FullName, findData.cFileName));
}
else if (findData.cFileName != "." && findData.cFileName != "..")
{
files.Add(Path.Combine(target.FullName, findData.cFileName));
}
} while (NativeWin32.FindNextFile(hFindFile, out findData));
}
foreach (var file in folders.SelectMany(folder => EnumerateAllFiles(new DirectoryInfo(folder), searchPattern)))
{
yield return(file);
}
foreach (var file in files)
{
yield return(new FileInfo(file));
}
}
public static IEnumerable <FileInfo> EnumerateFiles(this DirectoryInfo target, string searchPattern)
{
var searchPath = Path.Combine(target.FullName, searchPattern);
NativeWin32.WIN32_FIND_DATA findData;
using (var hFindFile = NativeWin32.FindFirstFile(searchPath, out findData))
{
if (hFindFile.IsInvalid)
{
yield break;
}
do
{
if ((findData.dwFileAttributes & FileAttributes.Directory) == 0 && findData.cFileName != "." && findData.cFileName != "..")
{
yield return(new FileInfo(Path.Combine(target.FullName, findData.cFileName)));
}
} while (NativeWin32.FindNextFile(hFindFile, out findData));
}
}
