protected override void OnNavigatedFrom(NavigationEventArgs e)
{
if (((App)App.Current).IsSuspending)
{
// Save volatile state in case we get terminated later on
// then we can restore as if we'd never been gone
ApplicationDataContainer Item = ApplicationData.Current.LocalSettings.CreateContainer("Item", ApplicationDataCreateDisposition.Always);
if (ApplicationData.Current.LocalSettings.Containers.ContainsKey("Item"))
{
Item.Values["title"] = title.Text;
ITextRange range = detail.Document.GetRange(0, TextConstants.MaxUnitCount);
Item.Values["detail"] = range.Text;
Item.Values["date"] = ddl.Date;
Item.Values["imgname"] = Common.selectName;
Item.Values["btn"] = create_update.Content;
}
if (ViewModel.SelectedItem != null)
{
ApplicationData.Current.LocalSettings.Values["selectitem"] = ViewModel.getItems.IndexOf(ViewModel.SelectedItem);
}
List <string> L = new List <string>();
var allitems = ViewModel.getItems;
foreach (var a in allitems)
{
var item = new myItem(a.date, a.imgname, a.title, a.detail, a.finish);
L.Add(JsonConvert.SerializeObject(item));
}
ApplicationData.Current.LocalSettings.Values["allitems"] = JsonConvert.SerializeObject(L);
}
}
protected override async void OnNavigatedTo(NavigationEventArgs e)
{
SystemNavigationManager.GetForCurrentView().AppViewBackButtonVisibility = AppViewBackButtonVisibility.Collapsed;
dataTransferManager.DataRequested += DataRequested;
if (e.NavigationMode == NavigationMode.New)
{
// If this is a new navigation, this is a fresh launch so we can discard any saved state
ApplicationData.Current.LocalSettings.Values.Remove("Item");
ApplicationData.Current.LocalSettings.Values.Remove("allitems");
ApplicationData.Current.LocalSettings.Values.Remove("selectitem");
}
else
{
// Try to restore state if any, in case we were terminated
if (ApplicationData.Current.LocalSettings.Values.ContainsKey("allitems"))
{
ViewModel.getItems.Clear();
List <string> L = JsonConvert.DeserializeObject <List <string> >(
(string)ApplicationData.Current.LocalSettings.Values["allitems"]);
foreach (var l in L)
{
myItem a = JsonConvert.DeserializeObject <myItem>(l);
TodoItem item = new TodoItem(a.date.Date, a.imgname, a.title, a.detail, a.finish);
ViewModel.getItems.Add(item);
}
}
if (ApplicationData.Current.LocalSettings.Values.ContainsKey("selectitem"))
{
ViewModel.SelectedItem = ViewModel.getItems[(int)(ApplicationData.Current.LocalSettings.Values["selectitem"])];
}
if (ApplicationData.Current.LocalSettings.Containers.ContainsKey("Item"))
{
ApplicationDataContainer Item = ApplicationData.Current.LocalSettings.Containers["Item"];
create_update.Content = Item.Values["btn"] as string;
title.Text = Item.Values["title"] as string;
ITextRange range = detail.Document.GetRange(0, TextConstants.MaxUnitCount);
range.Text = Item.Values["detail"] as string;
ddl.Date = (DateTimeOffset)(Item.Values["date"]);
Common.selectName = Item.Values["imgname"] as string;
if (Common.selectName == "")
{
pic.Source = new BitmapImage(new Uri("ms-appx:///Assets/todo.png"));
}
else
{
var file = await ApplicationData.Current.LocalFolder.GetFileAsync(Common.selectName);
IRandomAccessStream fileStream = await file.OpenAsync(FileAccessMode.Read);
BitmapImage bitmapImage = new BitmapImage();
await bitmapImage.SetSourceAsync(fileStream);
pic.Source = bitmapImage;
}
}
}
}
