public Task SerializePropertiesAsync(IDictionary <string, object> properties)
{
properties = new Dictionary <string, object>(properties);
// Serialize property dictionary to local storage
// Make sure to use Internal
return(Task.Run(() =>
{
var success = false;
var store = new TizenIsolatedStorageFile();
Stream stream = null;
try
{
stream = store.OpenFile(PropertyStoreFile + ".tmp", System.IO.FileMode.OpenOrCreate);
using (XmlDictionaryWriter writer = XmlDictionaryWriter.CreateBinaryWriter(stream))
{
stream = null;
var dcs = new DataContractSerializer(typeof(Dictionary <string, object>));
dcs.WriteObject(writer, properties);
writer.Flush();
success = true;
}
}
catch (Exception e)
{
Debug.WriteLine("Could not serialize properties: " + e.Message);
Internals.Log.Warning("Xamarin.Forms PropertyStore", $"Exception while writing Application properties: {e}");
}
finally
{
if (stream != null)
{
stream.Dispose();
}
}
if (!success)
{
return;
}
try
{
if (store.FileExists(PropertyStoreFile))
{
store.DeleteFile(PropertyStoreFile);
}
store.MoveFile(PropertyStoreFile + ".tmp", PropertyStoreFile);
}
catch (Exception e)
{
Debug.WriteLine("Could not move new serialized property file over old: " + e.Message);
Internals.Log.Warning("Xamarin.Forms PropertyStore", $"Exception while writing Application properties: {e}");
}
}));
}
public Task <IDictionary <string, object> > DeserializePropertiesAsync()
{
// Deserialize property dictionary to local storage
// Make sure to use Internal
return(Task.Run(() =>
{
var store = new TizenIsolatedStorageFile();
Stream stream = null;
try
{
stream = store.OpenFile(PropertyStoreFile, System.IO.FileMode.OpenOrCreate);
if (stream.Length == 0)
{
return null;
}
using (XmlDictionaryReader reader = XmlDictionaryReader.CreateBinaryReader(stream, XmlDictionaryReaderQuotas.Max))
{
stream = null;
var dcs = new DataContractSerializer(typeof(Dictionary <string, object>));
return (IDictionary <string, object>)dcs.ReadObject(reader);
}
}
catch (Exception e)
{
Debug.WriteLine("Could not deserialize properties: " + e.Message);
Internals.Log.Warning("Xamarin.Forms PropertyStore", $"Exception while reading Application properties: {e}");
}
finally
{
if (stream != null)
{
stream.Dispose();
}
}
return null;
}));
}
