public override async IAsyncEnumerable <FileSystemStorageItemBase> SearchAsync(string SearchWord, bool SearchInSubFolders = false, bool IncludeHiddenItem = false, bool IncludeSystemItem = false, bool IsRegexExpresstion = false, bool IgnoreCase = true, [EnumeratorCancellation] CancellationToken CancelToken = default)
{
foreach (DriveDataBase Drive in CommonAccessCollection.DriveList)
{
if (WIN_Native_API.CheckLocationAvailability(Drive.Path))
{
foreach (FileSystemStorageItemBase Item in await Task.Factory.StartNew(() => WIN_Native_API.Search(Drive.Path, SearchWord, SearchInSubFolders, IncludeHiddenItem, IncludeSystemItem, IsRegexExpresstion, IgnoreCase, CancelToken), TaskCreationOptions.LongRunning))
{
yield return(Item);
}
}
else
{
if (Drive.DriveFolder != null)
{
QueryOptions Options = new QueryOptions
{
FolderDepth = FolderDepth.Shallow,
IndexerOption = IndexerOption.DoNotUseIndexer
};
Options.SetThumbnailPrefetch(ThumbnailMode.ListView, 150, ThumbnailOptions.UseCurrentScale);
Options.SetPropertyPrefetch(PropertyPrefetchOptions.BasicProperties, new string[] { "System.FileName", "System.Size", "System.DateModified", "System.DateCreated" });
StorageItemQueryResult Query = Drive.DriveFolder.CreateItemQueryWithOptions(Options);
for (uint Index = 0; !CancelToken.IsCancellationRequested; Index += 50)
{
IReadOnlyList <IStorageItem> ReadOnlyItemList = await Query.GetItemsAsync(Index, 50).AsTask(CancelToken);
if (ReadOnlyItemList.Count > 0)
{
foreach (IStorageItem Item in IsRegexExpresstion
? ReadOnlyItemList.AsParallel().Where((Item) => Regex.IsMatch(Item.Name, SearchWord, IgnoreCase ? RegexOptions.IgnoreCase : RegexOptions.None))
: ReadOnlyItemList.AsParallel().Where((Item) => Item.Name.Contains(SearchWord, IgnoreCase ? StringComparison.OrdinalIgnoreCase : StringComparison.Ordinal)))
{
if (CancelToken.IsCancellationRequested)
{
yield break;
}
switch (Item)
{
case StorageFolder SubFolder:
{
yield return(await CreatedByStorageItemAsync(SubFolder));
break;
}
case StorageFile SubFile:
{
yield return(await CreatedByStorageItemAsync(SubFile));
break;
}
}
}
if (SearchInSubFolders)
{
foreach (StorageFolder Item in ReadOnlyItemList.OfType <StorageFolder>())
{
if (CancelToken.IsCancellationRequested)
{
yield break;
}
FileSystemStorageFolder FSubFolder = await CreatedByStorageItemAsync(Item);
await foreach (FileSystemStorageItemBase FSubItem in FSubFolder.SearchAsync(SearchWord, SearchInSubFolders, IncludeHiddenItem, IncludeSystemItem, IsRegexExpresstion, IgnoreCase, CancelToken))
{
if (CancelToken.IsCancellationRequested)
{
yield break;
}
yield return(FSubItem);
}
}
}
}
else
{
break;
}
}
}
}
}
}
