private async void AppBarAddGroupButton_Click(object sender, RoutedEventArgs e)
{
var dlg = new AddGroupDialog();
var ret = await dlg.ShowAsync();
if (ret == ContentDialogResult.Primary)
{
var group = await GetDataAsync(dlg.Message, dlg.Criterion);
this.GroupsViewModel.Add(group);
await XmlIO.SaveObjectToXml(this.GroupsViewModel.ToList(), "data.xml");
}
}
/// <summary>
/// Populates the page with content passed during navigation. Any saved state is also
/// provided when recreating a page from a prior session.
/// </summary>
/// <param name="sender">
/// The source of the event; typically <see cref="NavigationHelper"/>
/// </param>
/// <param name="e">Event data that provides both the navigation parameter passed to
/// <see cref="Frame.Navigate(Type, object)"/> when this page was initially requested and
/// a dictionary of state preserved by this page during an earlier
/// session. The state will be null the first time a page is visited.</param>
private async void NavigationHelper_LoadState(object sender, LoadStateEventArgs e)
{
//var dict = ApplicationData.Current.RoamingSettings.Values;
//var data = dict["data"] as byte[];
//if (data == null)
//{
// var group = await SampleDataSource.GetGroupsAsync();
// this.DefaultViewModel["Groups"] = group;
//}
//else
//{
// var x = new XmlSerializer(typeof(IEnumerable<SampleDataGroup>));
// using (var ms = new MemoryStream(data))
// {
// var group = x.Deserialize(ms) as IEnumerable<SampleDataGroup>;
// this.DefaultViewModel["Groups"] = group;
// }
//}
List <ContactGroup> data = null;
try
{
data = await XmlIO.ReadObjectFromXmlFileAsync <List <ContactGroup> >("data.xml");
}
catch (FileNotFoundException)
{
Debug.WriteLine("file not found");
}
catch (InvalidOperationException)
{
Debug.WriteLine("format not right");
}
Debug.WriteLine(data);
if (data == null)
{
//var group = await SampleDataSource.GetGroupsAsync();
//this.DefaultViewModel["Groups"] = group.ToList();
}
else
{
this.GroupsViewModel.Clear();
foreach (var item in data)
{
this.GroupsViewModel.Add(item);
}
}
}