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authorJason Smith <jason.smith@xamarin.com>2016-03-22 20:02:25 (GMT)
committerJason Smith <jason.smith@xamarin.com>2016-03-22 23:13:41 (GMT)
commit17fdde66d94155fc62a034fa6658995bef6fd6e5 (patch)
treeb5e5073a2a7b15cdbe826faa5c763e270a505729 /Xamarin.Forms.Platform.WinRT/WindowsIsolatedStorage.cs
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Initial import
Diffstat (limited to 'Xamarin.Forms.Platform.WinRT/WindowsIsolatedStorage.cs')
-rw-r--r--Xamarin.Forms.Platform.WinRT/WindowsIsolatedStorage.cs119
1 files changed, 119 insertions, 0 deletions
diff --git a/Xamarin.Forms.Platform.WinRT/WindowsIsolatedStorage.cs b/Xamarin.Forms.Platform.WinRT/WindowsIsolatedStorage.cs
new file mode 100644
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+++ b/Xamarin.Forms.Platform.WinRT/WindowsIsolatedStorage.cs
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+´╗┐using System;
+using System.IO;
+using System.Threading.Tasks;
+using Windows.Storage;
+using Windows.Storage.FileProperties;
+using Windows.Storage.Streams;
+
+#if WINDOWS_UWP
+
+namespace Xamarin.Forms.Platform.UWP
+#else
+
+namespace Xamarin.Forms.Platform.WinRT
+#endif
+{
+ internal class WindowsIsolatedStorage : IIsolatedStorageFile
+ {
+ StorageFolder _folder;
+
+ public WindowsIsolatedStorage(StorageFolder folder)
+ {
+ if (folder == null)
+ throw new ArgumentNullException("folder");
+
+ _folder = folder;
+ }
+
+ public Task CreateDirectoryAsync(string path)
+ {
+ return _folder.CreateFolderAsync(path).AsTask();
+ }
+
+ public async Task<bool> GetDirectoryExistsAsync(string path)
+ {
+ try
+ {
+ await _folder.GetFolderAsync(path).AsTask().ConfigureAwait(false);
+ return true;
+ }
+ catch (FileNotFoundException)
+ {
+ return false;
+ }
+ }
+
+ public async Task<bool> GetFileExistsAsync(string path)
+ {
+ try
+ {
+ await _folder.GetFileAsync(path).AsTask().ConfigureAwait(false);
+ return true;
+ }
+ catch (FileNotFoundException)
+ {
+ return false;
+ }
+ }
+
+ public async Task<DateTimeOffset> GetLastWriteTimeAsync(string path)
+ {
+ StorageFile file = await _folder.GetFileAsync(path).AsTask().ConfigureAwait(false);
+ BasicProperties properties = await file.GetBasicPropertiesAsync().AsTask().ConfigureAwait(false);
+ return properties.DateModified;
+ }
+
+ public async Task<Stream> OpenFileAsync(string path, FileMode mode, FileAccess access)
+ {
+ StorageFile file;
+
+ switch (mode)
+ {
+ case FileMode.CreateNew:
+ file = await _folder.CreateFileAsync(path, CreationCollisionOption.FailIfExists).AsTask().ConfigureAwait(false);
+ break;
+
+ case FileMode.Create:
+ case FileMode.Truncate: // TODO See if ReplaceExisting already truncates
+ file = await _folder.CreateFileAsync(path, CreationCollisionOption.ReplaceExisting).AsTask().ConfigureAwait(false);
+ break;
+
+ case FileMode.OpenOrCreate:
+ case FileMode.Append:
+ file = await _folder.CreateFileAsync(path, CreationCollisionOption.OpenIfExists).AsTask().ConfigureAwait(false);
+ break;
+
+ case FileMode.Open:
+ file = await _folder.GetFileAsync(path);
+ break;
+
+ default:
+ throw new ArgumentException("mode was an invalid FileMode", "mode");
+ }
+
+ switch (access)
+ {
+ case FileAccess.Read:
+ return await file.OpenStreamForReadAsync().ConfigureAwait(false);
+ case FileAccess.Write:
+ Stream stream = await file.OpenStreamForWriteAsync().ConfigureAwait(false);
+ if (mode == FileMode.Append)
+ stream.Position = stream.Length;
+
+ return stream;
+
+ case FileAccess.ReadWrite:
+ IRandomAccessStream randStream = await file.OpenAsync(FileAccessMode.ReadWrite).AsTask().ConfigureAwait(false);
+ return randStream.AsStream();
+
+ default:
+ throw new ArgumentException("access was an invalid FileAccess", "access");
+ }
+ }
+
+ public Task<Stream> OpenFileAsync(string path, FileMode mode, FileAccess access, FileShare share)
+ {
+ return OpenFileAsync(path, mode, access);
+ }
+ }
+} \ No newline at end of file