/// <summary>
/// Finds first file that matches pattern
/// </summary>
/// <returns>FileInfo for first file or null</returns>
public FileInfo FindFirstFile(FileSortOptions sortOrder, TimeSpan minFileAge)
{
// Set the search options depending on directory matches
SearchOption searchOpt = SearchOption.TopDirectoryOnly;
if (IncludeSubDirs)
{
searchOpt = SearchOption.AllDirectories;
}
IEnumerable <FileInfo> files = null;
DirectoryInfo diTop = new DirectoryInfo(m_path);
foreach (string filter in m_filterList)
{
DateTime timeStamp = DateTime.UtcNow;
// Only send files which are at least minFileAge old
if (minFileAge != TimeSpan.Zero)
{
timeStamp = DateTime.UtcNow.Subtract(minFileAge);
}
if (sortOrder == FileSortOptions.None)
{
files = from file in diTop.EnumerateFiles(filter, searchOpt)
where file.CreationTimeUtc < timeStamp
select file;
}
else if (sortOrder == FileSortOptions.CreationTimeUtcAscending)
{
// LINQ query to sort by CreationTime
files = from file in diTop.EnumerateFiles(filter, searchOpt)
where file.CreationTimeUtc < timeStamp
orderby file.CreationTimeUtc ascending
select file;
}
else if (sortOrder == FileSortOptions.CreationTimeUtcDescending)
{
files = from file in diTop.EnumerateFiles(filter, searchOpt)
where file.CreationTimeUtc < timeStamp
orderby file.CreationTimeUtc descending
select file;
}
else if (sortOrder == FileSortOptions.FileNameAscending)
{
files = from file in diTop.EnumerateFiles(filter, searchOpt)
where file.CreationTimeUtc < timeStamp
orderby file.Name ascending
select file;
}
else if (sortOrder == FileSortOptions.FileNameDescending)
{
files = from file in diTop.EnumerateFiles(filter, searchOpt)
where file.CreationTimeUtc < timeStamp
orderby file.Name descending
select file;
}
// Remove unwanted files
if (!IncludeEmptyFiles)
{
files = from file in files where file.Length > 0 select file;
}
if (!IncludeHiddenFiles)
{
files = from file in files where !file.Attributes.HasFlag(FileAttributes.Hidden) select file;
}
if (!IncludeReadOnlyFiles)
{
files = from file in files where !file.Attributes.HasFlag(FileAttributes.ReadOnly) select file;
}
if (!IncludeSystemFiles)
{
files = from file in files where !file.Attributes.HasFlag(FileAttributes.System) select file;
}
if (!IncludeTemporatyFiles)
{
files = from file in files where !file.Attributes.HasFlag(FileAttributes.Temporary) select file;
}
// We have atleast one file matched, so break loop
if (files != null && files.Count() > 0)
{
break;
}
}
if (files != null)
{
return(files.FirstOrDefault());
}
else
{
return(null);
}
}
public FileInfo FindFirstFile(FileSortOptions sortOrder)
{
return(FindFirstFile(sortOrder, TimeSpan.Zero));
}
/// <summary>
/// Get an enumerator that returns all of the files that match the wildcards that
/// are in any of the directories to be searched.
/// </summary>
/// <returns>An IEnumerable that returns all matching files one by one.</returns>
/// <remarks>The enumerator that is returned finds files using a lazy algorithm that
/// searches directories incrementally as matches are consumed.</remarks>
public IEnumerable <FileInfo> Matches(FileSortOptions sortOrder, TimeSpan minFileAge, int maxNumberOfFiles)
{
// Set the search options depending on directory matches
SearchOption searchOpt = SearchOption.TopDirectoryOnly;
if (IncludeSubDirs)
{
searchOpt = SearchOption.AllDirectories;
}
DirectoryInfo diTop = new DirectoryInfo(m_path);
IEnumerable <FileInfo> files = null;
foreach (string filter in m_filterList)
{
IEnumerable <FileInfo> tmpFiles = null;
DateTime timeStamp = DateTime.UtcNow;
// Only send files which are at least minFileAge old
if (minFileAge != TimeSpan.Zero)
{
timeStamp = DateTime.UtcNow.Subtract(minFileAge);
}
if (sortOrder == FileSortOptions.None)
{
tmpFiles = from file in diTop.EnumerateFiles(filter, searchOpt)
where file.CreationTimeUtc < timeStamp
select file;
}
else if (sortOrder == FileSortOptions.CreationTimeUtcAscending)
{
// LINQ query to sort by CreationTime
tmpFiles = from file in diTop.EnumerateFiles(filter, searchOpt)
where file.CreationTimeUtc < timeStamp
orderby file.CreationTimeUtc ascending
select file;
}
else if (sortOrder == FileSortOptions.CreationTimeUtcDescending)
{
tmpFiles = from file in diTop.EnumerateFiles(filter, searchOpt)
where file.CreationTimeUtc < timeStamp
orderby file.CreationTimeUtc descending
select file;
}
else if (sortOrder == FileSortOptions.FileNameAscending)
{
tmpFiles = from file in diTop.EnumerateFiles(filter, searchOpt)
where file.CreationTimeUtc < timeStamp
orderby file.Name ascending
select file;
}
else if (sortOrder == FileSortOptions.FileNameDescending)
{
tmpFiles = from file in diTop.EnumerateFiles(filter, searchOpt)
where file.CreationTimeUtc < timeStamp
orderby file.Name descending
select file;
}
// Remove unwanted files
if (!IncludeEmptyFiles)
{
tmpFiles = from file in tmpFiles where file.Length > 0 select file;
}
if (!IncludeHiddenFiles)
{
tmpFiles = from file in tmpFiles where !file.Attributes.HasFlag(FileAttributes.Hidden) select file;
}
if (!IncludeReadOnlyFiles)
{
tmpFiles = from file in tmpFiles where !file.Attributes.HasFlag(FileAttributes.ReadOnly) select file;
}
if (!IncludeSystemFiles)
{
tmpFiles = from file in tmpFiles where !file.Attributes.HasFlag(FileAttributes.System) select file;
}
if (!IncludeTemporatyFiles)
{
tmpFiles = from file in tmpFiles where !file.Attributes.HasFlag(FileAttributes.Temporary) select file;
}
// Concatenate the files
if (files != null)
{
files = files.Concat(tmpFiles);
}
else
{
files = tmpFiles;
}
}
if (maxNumberOfFiles == -1)
{
return(files);
}
else
{
return(files.Take(maxNumberOfFiles));
}
}
public IEnumerable <FileInfo> Matches(FileSortOptions sortOrder)
{
return(Matches(sortOrder, TimeSpan.Zero));
}
public IEnumerable <FileInfo> Matches(FileSortOptions sortOrder, TimeSpan minFileAge)
{
return(Matches(sortOrder, minFileAge, -1));
}
