/// <summary>
/// Writes an array of Session objects to local storage.
/// </summary>
/// <param name="sessions">The Session objects to write. This is an array to force it to be a fixed collection by the time it gets here.</param>
/// <returns>A task that can be awaited until the storage completes.</returns>
public static async Task SerializeLocalSessions(Session[] sessions) {
var fileList = await ApplicationData.Current.LocalFolder.GetFilesAsync();
var scratchFile = await ApplicationData.Current.LocalFolder.CreateFileAsync(localScratchSessionsFileName, CreationCollisionOption.ReplaceExisting);
using (var storageTransaction = await scratchFile.OpenTransactedWriteAsync()) {
using (var dw = new Windows.Storage.Streams.DataWriter(storageTransaction.Stream)) {
dw.WriteInt32(sessions.Length);
for (int x = 0; x < sessions.Length; x++) {
sessions[x].WriteSession(dw);
}
storageTransaction.Stream.Size = await dw.StoreAsync();
await storageTransaction.CommitAsync();
}
}
await scratchFile.RenameAsync(localSessionsFileName, NameCollisionOption.ReplaceExisting);
}
// Send a message to the socket.
private async void SendMessageText()
{
string msg = SendMessageTextBox.Text;
if (msg.Length > 0)
{
var msgLength = dataWriter.MeasureString(msg);
dataWriter.WriteInt32(msg.Length);
dataWriter.WriteString(msg);
try
{
await dataWriter.StoreAsync();
WriteMessageText("Message sent: " + msg + "\n");
}
catch (Exception e)
{
WriteMessageText("Send error: " + e.Message + "\n");
}
}
}
public async void SaveData() {
var fileList = await ApplicationData.Current.LocalFolder.GetFilesAsync();
System.IO.MemoryStream ms = new System.IO.MemoryStream();
var scratchFile = await ApplicationData.Current.LocalFolder.CreateFileAsync(localScratchFileName, CreationCollisionOption.ReplaceExisting);
using (var storageTransaction = await scratchFile.OpenTransactedWriteAsync()) {
using (var dw = new Windows.Storage.Streams.DataWriter(storageTransaction.Stream)) {
dw.WriteInt32(Items.Count);
for (int x = 0; x < Items.Count; x++) {
TrackItem item = Items[x];
dw.WriteDateTime(item.Start);
dw.WriteDateTime(item.End.Value);
dw.WriteInt32(item.Topic.Length);
dw.WriteString(item.Topic);
}
if (CurrentItem == null) {
dw.WriteBoolean(false);
} else {
dw.WriteBoolean(true);
dw.WriteDateTime(CurrentItem.Start);
dw.WriteInt32(CurrentItem.Topic.Length);
dw.WriteString(CurrentItem.Topic);
}
storageTransaction.Stream.Size = await dw.StoreAsync();
await storageTransaction.CommitAsync();
}
}
await scratchFile.RenameAsync(localFileName, NameCollisionOption.ReplaceExisting);
}