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Diffstat (limited to 'Xamarin.Forms.Platform.WinRT/WindowsSerializer.cs')
-rw-r--r--Xamarin.Forms.Platform.WinRT/WindowsSerializer.cs60
1 files changed, 60 insertions, 0 deletions
diff --git a/Xamarin.Forms.Platform.WinRT/WindowsSerializer.cs b/Xamarin.Forms.Platform.WinRT/WindowsSerializer.cs
new file mode 100644
index 00000000..4e0ad794
--- /dev/null
+++ b/Xamarin.Forms.Platform.WinRT/WindowsSerializer.cs
@@ -0,0 +1,60 @@
+´╗┐using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.IO;
+using System.Runtime.Serialization;
+using System.Threading.Tasks;
+using Windows.Storage;
+
+#if WINDOWS_UWP
+
+namespace Xamarin.Forms.Platform.UWP
+#else
+
+namespace Xamarin.Forms.Platform.WinRT
+#endif
+{
+ internal sealed class WindowsSerializer : IDeserializer
+ {
+ const string PropertyStoreFile = "PropertyStore.forms";
+
+ public async Task<IDictionary<string, object>> DeserializePropertiesAsync()
+ {
+ try
+ {
+ StorageFile file = await ApplicationData.Current.RoamingFolder.GetFileAsync(PropertyStoreFile).DontSync();
+ using(Stream stream = (await file.OpenReadAsync().DontSync()).AsStreamForRead())
+ {
+ if (stream.Length == 0)
+ return new Dictionary<string, object>(4);
+
+ var serializer = new DataContractSerializer(typeof(IDictionary<string, object>));
+ return (IDictionary<string, object>)serializer.ReadObject(stream);
+ }
+ }
+ catch (FileNotFoundException)
+ {
+ return new Dictionary<string, object>(4);
+ }
+ }
+
+ public async Task SerializePropertiesAsync(IDictionary<string, object> properties)
+ {
+ StorageFile file = await ApplicationData.Current.RoamingFolder.CreateFileAsync(PropertyStoreFile, CreationCollisionOption.ReplaceExisting).DontSync();
+ using(StorageStreamTransaction transaction = await file.OpenTransactedWriteAsync().DontSync())
+ {
+ try
+ {
+ Stream stream = transaction.Stream.AsStream();
+ var serializer = new DataContractSerializer(typeof(IDictionary<string, object>));
+ serializer.WriteObject(stream, properties);
+ await transaction.CommitAsync().DontSync();
+ }
+ catch (Exception e)
+ {
+ Debug.WriteLine("Could not move new serialized property file over old: " + e.Message);
+ }
+ }
+ }
+ }
+} \ No newline at end of file