// 通过 StorageFolder.Properties 的 RetrievePropertiesAsync() 方法获取文件的属性
private async Task ShowProperties3(StorageFile storageFile)
{
/*
* 获取文件的其它各种属性
* 详细的属性列表请参见结尾处的“附录一: 属性列表”或者参见：http://msdn.microsoft.com/en-us/library/windows/desktop/ff521735(v=vs.85).aspx
*/
List <string> propertiesName = new List <string>();
propertiesName.Add("System.DateAccessed");
propertiesName.Add("System.DateCreated");
propertiesName.Add("System.FileOwner");
propertiesName.Add("System.FileAttributes");
StorageItemContentProperties storageItemContentProperties = storageFile.Properties;
IDictionary <string, object> extraProperties = await storageItemContentProperties.RetrievePropertiesAsync(propertiesName);
lblMsg.Text += "System.DateAccessed：" + extraProperties["System.DateAccessed"];
lblMsg.Text += Environment.NewLine;
lblMsg.Text += "System.DateCreated：" + extraProperties["System.DateCreated"];
lblMsg.Text += Environment.NewLine;
lblMsg.Text += "System.FileOwner：" + extraProperties["System.FileOwner"];
lblMsg.Text += Environment.NewLine;
lblMsg.Text += "System.FileAttributes：" + extraProperties["System.FileAttributes"];
lblMsg.Text += Environment.NewLine;
}
private async Task LoadFile(StorageFile file)
{
if (isCanceled)
{
return;
}
if (Utilities.IsSupportedFileType(file.FileType))
{
StorageItemContentProperties fileProperties = file.Properties;
MusicProperties musicProperties = await fileProperties.GetMusicPropertiesAsync();
IDictionary <string, object> artistProperties = await fileProperties.RetrievePropertiesAsync(RealMusicProperties);
object artists = null;
artistProperties.TryGetValue("System.Music.Artist", out artists);
string[] artistsAsArray = DebugHelper.CastAndAssert <string[]>(artists);
string artistName = string.Empty;
if (artistsAsArray != null && artistsAsArray.Length > 0)
{
artistName = artistsAsArray[0];
}
if (this.TrackScanned != null)
{
this.TrackScanned(this, new TrackScannedEventArgs(new StorageProviderSong(file.Path, musicProperties, artistName)));
}
}
}
private async Task <Dictionary <string, string> > GetProperties(StorageFile temporaryFile, CancellationToken cancellationToken)
{
StorageItemContentProperties properties = temporaryFile.Properties;
MusicProperties musicProperties = await properties.GetMusicPropertiesAsync();
VideoProperties videoProperties = await properties.GetVideoPropertiesAsync();
BasicProperties basicProperties = await temporaryFile.GetBasicPropertiesAsync();
CancelTask(cancellationToken);
Dictionary <string, string> tempDictionary = new Dictionary <string, string>();
tempDictionary["Display Name"] = temporaryFile.DisplayName;
tempDictionary["File Type"] = temporaryFile.FileType;
tempDictionary["Current Folder Path"] = temporaryFile.FolderRelativeId;
tempDictionary["Size"] = string.Format("{0:0.00}", (Convert.ToDouble(basicProperties.Size) / 1048576d)) + " Mb";
tempDictionary["Creation Date"] = temporaryFile.DateCreated.ToString();
tempDictionary["Modified Date"] = basicProperties.DateModified.ToString();
tempDictionary["Audio Bit Rate"] = musicProperties.Bitrate + " bps";
tempDictionary["Length"] = videoProperties.Duration.ToString("hh\\:mm\\:ss");
tempDictionary["Frame Width"] = videoProperties.Width + "";
tempDictionary["Frame Height"] = videoProperties.Height + "";
tempDictionary["Orientation"] = videoProperties.Orientation + "";
tempDictionary["Total Bit Rate"] = videoProperties.Bitrate + " bps";
CancelTask(cancellationToken);
return(tempDictionary);
}
public async void GetOtherPropeties(StorageItemContentProperties properties)
{
string dateAccessedProperty = "System.DateAccessed";
string fileOwnerProperty = "System.FileOwner";
List <string> propertiesName = new List <string>();
propertiesName.Add(dateAccessedProperty);
propertiesName.Add(fileOwnerProperty);
IDictionary <string, object> extraProperties = await properties.RetrievePropertiesAsync(propertiesName);
ViewModel.ItemAccessedTimestamp = ListedItem.GetFriendlyDate((DateTimeOffset)extraProperties[dateAccessedProperty]);
ViewModel.ItemFileOwner = extraProperties[fileOwnerProperty].ToString();
}
public async void GetOtherProperties(StorageItemContentProperties properties)
{
string dateAccessedProperty = "System.DateAccessed";
List <string> propertiesName = new List <string>();
propertiesName.Add(dateAccessedProperty);
IDictionary <string, object> extraProperties = await properties.RetrievePropertiesAsync(propertiesName);
ApplicationDataContainer localSettings = ApplicationData.Current.LocalSettings;
string returnformat = Enum.Parse <TimeStyle>(localSettings.Values[Constants.LocalSettings.DateTimeFormat].ToString()) == TimeStyle.Application ? "D" : "g";
// Cannot get date and owner in MTP devices
ViewModel.ItemAccessedTimestamp = ((DateTimeOffset)(extraProperties[dateAccessedProperty] ?? DateTimeOffset.Now)).GetFriendlyDateFromFormat(returnformat);
}
private async void Rename(Tag mytag)
{
CurrentSong = SongList.SelectedItem as Song;
using (SQLiteConnection db = new SQLiteConnection(App.DB_PATH))
{
string import_name;
var temp_format_id = db.Find <MusicFormat>(c => c.Id == CurrentSong.FormatId);
import_name = CurrentSong.Path + CurrentSong.NameSong + "." + temp_format_id.NameFormat;
Main_folder = await Windows.Storage.AccessCache.StorageApplicationPermissions
.FutureAccessList.GetFolderAsync("Audio");
StorageFile music_files = await Main_folder.GetFileAsync(import_name);
var fileProperties = await music_files.Properties.GetMusicPropertiesAsync();
//*Нормально не изменяет артиста
StorageItemContentProperties rfileProperties = music_files.Properties;
MusicProperties musicFileProperties = await rfileProperties.GetMusicPropertiesAsync();
string[] contributingArtistsKey = { "System.Music.Artist" };
IDictionary <string, object> contributingArtistsProperty =
await musicFileProperties.RetrievePropertiesAsync(contributingArtistsKey);
string[] contributingArtists = contributingArtistsProperty["System.Music.Artist"] as string[];
//fileProperties.Genre = mytag.Genge; \\только для чтения
fileProperties.TrackNumber = Convert.ToUInt32(mytag.TrackNumber);
fileProperties.Album = mytag.Albom;
fileProperties.Artist = mytag.Artist;
//fileProperties.Composers = mytag.Composer; \\только для чтения
fileProperties.Title = mytag.NameSong;
fileProperties.Year = Convert.ToUInt32(mytag.Year);
fileProperties.AlbumArtist = mytag.ArtistAlbom;
//*Ошибка доступа для Флер
await fileProperties.SavePropertiesAsync();
var temp_song = db.Find <Song>(c => c.TagId == mytag.Id);
await Task.Run(() =>
{
temp_song.DateChange = DateTime.Now.AddHours(5);
Db_Helper.Update_Song(temp_song);
});
}
var dialog = new MessageDialog("Тег изменен");
await dialog.ShowAsync();
}
// 通过 StorageFolder.Properties 的 GetImagePropertiesAsync(), GetVideoPropertiesAsync(), GetMusicPropertiesAsync(), GetDocumentPropertiesAsync() 方法获取文件的属性
private async Task ShowProperties4(StorageFile storageFile)
{
StorageItemContentProperties storageItemContentProperties = storageFile.Properties;
ImageProperties imageProperties = await storageItemContentProperties.GetImagePropertiesAsync(); // 图片属性
VideoProperties videoProperties = await storageItemContentProperties.GetVideoPropertiesAsync(); // 视频属性
MusicProperties musicProperties = await storageItemContentProperties.GetMusicPropertiesAsync(); // 音频属性
DocumentProperties documentProperties = await storageItemContentProperties.GetDocumentPropertiesAsync(); // 文档属性
lblMsg.Text += "image width：" + imageProperties.Width;
lblMsg.Text += Environment.NewLine;
lblMsg.Text += "image height：" + imageProperties.Height;
lblMsg.Text += Environment.NewLine;
}
public async void GetOtherProperties(StorageItemContentProperties properties)
{
string dateAccessedProperty = "System.DateAccessed";
string fileOwnerProperty = "System.FileOwner";
List <string> propertiesName = new List <string>();
propertiesName.Add(dateAccessedProperty);
propertiesName.Add(fileOwnerProperty);
IDictionary <string, object> extraProperties = await properties.RetrievePropertiesAsync(propertiesName);
// Cannot get date and owner in MTP devices
ViewModel.ItemAccessedTimestamp = ListedItem.GetFriendlyDate((DateTimeOffset)(extraProperties[dateAccessedProperty] ?? DateTimeOffset.Now));
if (App.AppSettings.ShowFileOwner)
{
// Cannot get date and owner in MTP devices
ViewModel.ItemFileOwner = extraProperties[fileOwnerProperty]?.ToString();
}
}
// 修改文件的属性
private async void btnModifyProperty_Click(object sender, Windows.UI.Xaml.RoutedEventArgs e)
{
// 用户选中的文件
string fileName = (string)listBox.SelectedItem;
StorageFolder picturesFolder = await KnownFolders.GetFolderForUserAsync(null, KnownFolderId.PicturesLibrary);
StorageFile storageFile = await picturesFolder.GetFileAsync(fileName);
// 在 System.FileAttributes 中保存有文件是否是“只读”的信息
string[] retrieveList = new string[] { "System.FileAttributes" };
StorageItemContentProperties storageItemContentProperties = storageFile.Properties;
IDictionary <string, object> extraProperties = await storageItemContentProperties.RetrievePropertiesAsync(retrieveList);
uint FILE_ATTRIBUTES_READONLY = 1;
if (extraProperties != null && extraProperties.ContainsKey("System.FileAttributes"))
{
// 切换文件的只读属性
uint temp = (UInt32)extraProperties["System.FileAttributes"] ^ FILE_ATTRIBUTES_READONLY;
// 设置文件的只读属性为 true
// uint temp = (UInt32)extraProperties["System.FileAttributes"] | 1;
// 设置文件的只读属性为 false
// uint temp = (UInt32)extraProperties["System.FileAttributes"] & 0;
extraProperties["System.FileAttributes"] = temp;
}
else
{
// 设置文件的只读属性为 true
extraProperties = new PropertySet();
extraProperties.Add("System.FileAttributes", FILE_ATTRIBUTES_READONLY);
}
// 保存修改后的属性（用这种方法可以修改部分属性，大部分属性都是无权限修改的）
await storageFile.Properties.SavePropertiesAsync(extraProperties);
}
