public static int CopyTo(this DirectoryInfo sourceDirectory, DirectoryInfo destinationDirectory,
bool copySubDirectories = true, IEnumerable<Predicate<FileInfo>> filesToExclude = null, IEnumerable<string> directoriesToExclude = null)
{
var copiedItems = 0;
if (sourceDirectory == null)
{
throw new ArgumentNullException(nameof(sourceDirectory));
}
if (destinationDirectory == null)
{
throw new ArgumentNullException(nameof(destinationDirectory));
}
if (!sourceDirectory.Exists)
{
throw new DirectoryNotFoundException(
$"Source directory does not exist or could not be found: {sourceDirectory.FullName}");
}
var filePredicates = filesToExclude ?? new List<Predicate<FileInfo>>();
var excludedDirectories = directoriesToExclude ?? new List<string>();
if (destinationDirectory.Exists)
{
if (!destinationDirectory.IsEmpty())
{
var fileCount = destinationDirectory.GetFiles().Length;
var directoryCount = destinationDirectory.GetDirectories().Length;
throw new IOException(
$"The folder '{destinationDirectory.FullName}' cannot be used as a target folder since there are {fileCount} files and {directoryCount} folders in the folder");
}
}
else
{
destinationDirectory.Create();
copiedItems++;
}
var files = sourceDirectory.EnumerateFiles().Where(file => filePredicates.All(predicate => !predicate(file))).ToList();
foreach (FileInfo file in files)
{
var temppath = Path.Combine(destinationDirectory.FullName, file.Name);
Debug.WriteLine($"Copying file '{file.Name}' to '{temppath.FullName}'");
file.CopyTo(temppath.FullName, false);
copiedItems++;
}
if (copySubDirectories)
{
DirectoryInfo[] subDirectory = sourceDirectory.GetDirectories();
foreach (DirectoryInfo subdir in subDirectory)
{
if (
!excludedDirectories.Any(
excluded => subdir.Name.Equals(excluded, StringComparison.InvariantCultureIgnoreCase)))
{
var subDirectoryTempPath = Path.Combine(destinationDirectory.FullName, subdir.Name);
var subDirectoryInfo = new DirectoryInfo(subDirectoryTempPath.FullName);
Debug.WriteLine($"Copying directory '{subDirectoryInfo.Name}' to '{subDirectoryTempPath.FullName}'");
copiedItems += subdir.CopyTo(subDirectoryInfo, copySubDirectories, filesToExclude, directoriesToExclude);
}
}
}
return copiedItems;
}