/// <summary>
/// Test if a file exists in the application local cache folder.
/// </summary>
/// <param name="knownFolderId">The well known folder ID to use</param>
/// <param name="fileName">Relative name of the file to open. Can contains subfolders.</param>
/// <returns>True if file exists.</returns>
public static Task <bool> IsKnownFolderFileExistsAsync(
KnownFolderId knownFolderId,
string fileName)
{
StorageFolder workingFolder = StorageFileHelper.GetFolderFromKnownFolderId(knownFolderId);
return(workingFolder.IsFileExistsAsync(fileName));
}
/// <summary>
/// Return a stream to a specified file from the application local cache folder.
/// </summary>
/// <param name="knownFolderId">The well known folder ID to use</param>
/// <param name="fileName">Relative name of the file to open. Can contains subfolders.</param>
/// <param name="accessMode">File access mode. Default is read.</param>
/// <returns>File stream</returns>
public static Task <IRandomAccessStream> GetKnowFoldersFileStreamAsync(
KnownFolderId knownFolderId,
string fileName,
FileAccessMode accessMode = FileAccessMode.Read)
{
StorageFolder workingFolder = StorageFileHelper.GetFolderFromKnownFolderId(knownFolderId);
return(GetFileStreamAsync(fileName, accessMode, workingFolder));
}
/// <summary>
/// Gets an array of bytes from a <see cref="StorageFile"/> located in a well known folder.
/// </summary>
/// <param name="knownFolderId">
/// The well known folder ID to use.
/// </param>
/// <param name="fileName">
/// The relative <see cref="string"/> file path.
/// </param>
/// <returns>
/// Returns the stored <see cref="byte"/> array.
/// </returns>
/// <exception cref="ArgumentNullException">
/// Exception thrown if the <paramref name="fileName"/> is null or empty.
/// </exception>
public static Task <byte[]> ReadBytesFromKnownFoldersFileAsync(
KnownFolderId knownFolderId,
string fileName)
{
if (string.IsNullOrWhiteSpace(fileName))
{
throw new ArgumentNullException(nameof(fileName));
}
var folder = GetFolderFromKnownFolderId(knownFolderId);
return(folder.ReadBytesFromFileAsync(fileName));
}
/// <summary>
/// Gets a string value from a <see cref="StorageFile"/> located in a well known folder.
/// </summary>
/// <param name="knownFolderId">
/// The well known folder ID to use.
/// </param>
/// <param name="fileName">
/// The relative <see cref="string"/> file path.
/// </param>
/// <returns>
/// Returns the stored <see cref="string"/> value.
/// </returns>
/// <exception cref="ArgumentNullException">
/// Exception thrown if the <paramref name="fileName"/> is null or empty.
/// </exception>
public static async Task <string> ReadTextFromKnownFoldersFileAsync(
KnownFolderId knownFolderId,
string fileName)
{
if (string.IsNullOrWhiteSpace(fileName))
{
throw new ArgumentNullException(nameof(fileName));
}
var folder = GetFolderFromKnownFolderId(knownFolderId);
return(await ReadTextFromFileAsync(folder, fileName));
}
/// <summary>
/// Saves an array of bytes to a <see cref="StorageFile"/> to well known folder/>.
/// </summary>
/// <param name="knownFolderId">
/// The well known folder ID to use.
/// </param>
/// <param name="bytes">
/// The <see cref="byte"/> array to save to the file.
/// </param>
/// <param name="fileName">
/// The <see cref="string"/> name for the file.
/// </param>
/// <param name="options">
/// The creation collision options. Default is ReplaceExisting.
/// </param>
/// <returns>
/// Returns the saved <see cref="StorageFile"/> containing the bytes.
/// </returns>
/// <exception cref="ArgumentNullException">
/// Exception thrown if the file location or file name are null or empty.
/// </exception>
public static Task <StorageFile> WriteBytesToKnownFolderFileAsync(
KnownFolderId knownFolderId,
byte[] bytes,
string fileName,
CreationCollisionOption options = CreationCollisionOption.ReplaceExisting)
{
if (string.IsNullOrWhiteSpace(fileName))
{
throw new ArgumentNullException(nameof(fileName));
}
var folder = GetFolderFromKnownFolderId(knownFolderId);
return(folder.WriteBytesToFileAsync(bytes, fileName, options));
}
async Task libLoad(KnownFolderId library)
{
IsReady = false;
try
{
var max = 200;
var sfs = await IsoStorePoc.LoadFromLibFolder(library);
MediaInfos.Clear();
sfs.Take(max).ToList().ForEach(sf => MediaInfos.Add(new MediaInfo(sf)));
ApplicationView.GetForCurrentView().Title = Info = $@"Ttl {sfs.Count} in {library}, taking first {max}";
}
finally
{
IsReady = true;
}
}
// /// <summary>
// /// Gets an object that provides access to the content-related properties of the current folder.
// /// </summary>
// public StorageItemContentProperties Properties { get; }
// /// <summary>
// /// Gets the StorageProvider object that contains info about the service that stores the current folder.
// /// </summary>
// public StorageProvider Provider { get; }
internal StorageFolder(KnownFolderId folderId)
{
// currently there is only support for removable devices
// and internal storage devices
if (folderId == KnownFolderId.RemovableDevices)
{
_name = s_RemovableStorageDevicesName;
}
else if (folderId == KnownFolderId.InternalDevices)
{
_name = s_InternalStorageDevicesName;
}
else
{
throw new NotSupportedException();
}
_knownFolderId = folderId;
_path = "";
}
async Task onLoadLib_Task(KnownFolderId library)
{
try
{
CanLoadLibs = false;
if (library == KnownFolderId.AllAppMods)
{
await onLoadLib_Task(KnownFolderId.MusicLibrary);
await onLoadLib_Task(KnownFolderId.VideosLibrary);
return;
}
var max = 1000;
var sfs = await IsoStorePoc.LoadFromLibFolder(library);
var ll = sfs.Take(max).OrderBy(r => r.Path).ThenBy(r => r.Name);
foreach (var sf in ll)
{
await addNewOrFromMru(sf); //async ruins the order by: ll.ToList().ForEach(async sf => await add(sf));
}
if (SlctMru != null)
{
SlctLib = selectFromList(SlctMru.PathFile, LibLst);
}
ApplicationView.GetForCurrentView().Title = $@"{library}: {LibLst.Count} / {sfs.Count} ";
TbInfo += $@"\r\n{ApplicationView.GetForCurrentView().Title} ";
}
catch (Exception ex) { Debug.WriteLine($"$#~>{ex.Message}"); if (Debugger.IsAttached)
{
Debugger.Break();
}
else
{
await popEx(ex, GetType().FullName);
} }
finally { CanLoadLibs = true; }
}
/// <summary>
/// Returns a <see cref="StorageFolder"/> from a <see cref="KnownFolderId"/>
/// </summary>
/// <param name="knownFolderId">Folder Id</param>
/// <returns><see cref="StorageFolder"/></returns>
internal static StorageFolder GetFolderFromKnownFolderId(KnownFolderId knownFolderId)
{
StorageFolder workingFolder;
switch (knownFolderId)
{
case KnownFolderId.AppCaptures:
workingFolder = KnownFolders.AppCaptures;
break;
case KnownFolderId.CameraRoll:
workingFolder = KnownFolders.CameraRoll;
break;
case KnownFolderId.DocumentsLibrary:
workingFolder = KnownFolders.DocumentsLibrary;
break;
case KnownFolderId.HomeGroup:
workingFolder = KnownFolders.HomeGroup;
break;
case KnownFolderId.MediaServerDevices:
workingFolder = KnownFolders.MediaServerDevices;
break;
case KnownFolderId.MusicLibrary:
workingFolder = KnownFolders.MusicLibrary;
break;
case KnownFolderId.Objects3D:
workingFolder = KnownFolders.Objects3D;
break;
case KnownFolderId.PicturesLibrary:
workingFolder = KnownFolders.PicturesLibrary;
break;
case KnownFolderId.Playlists:
workingFolder = KnownFolders.Playlists;
break;
case KnownFolderId.RecordedCalls:
workingFolder = KnownFolders.RecordedCalls;
break;
case KnownFolderId.RemovableDevices:
workingFolder = KnownFolders.RemovableDevices;
break;
case KnownFolderId.SavedPictures:
workingFolder = KnownFolders.SavedPictures;
break;
case KnownFolderId.VideosLibrary:
workingFolder = KnownFolders.VideosLibrary;
break;
default:
throw new ArgumentOutOfRangeException(nameof(knownFolderId), knownFolderId, null);
}
return(workingFolder);
}
async void onLoadLib_void(KnownFolderId library)
{
await onLoadLib_Task(library);
}
