protected override async void OnNavigatedTo(NavigationEventArgs e)
{
SystemNavigationManager.GetForCurrentView().AppViewBackButtonVisibility =
AppViewBackButtonVisibility.Visible;
if (e.NavigationMode == NavigationMode.New)
{
if (ViewModel.SelectedItem != null)
{
create_update.Content = "Update";
title.Text = ViewModel.SelectedItem.title;
ITextRange range = detail.Document.GetRange(0, TextConstants.MaxUnitCount);
range.Text = ViewModel.SelectedItem.detail;
ddl.Date = ViewModel.SelectedItem.date;
pic.Source = ViewModel.SelectedItem.img;
}
// 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"))
{
var allitems = ViewModel.getItems;
allitems.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);
allitems.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;
}
}
}
}
public void RemoveItem()
{
items.Remove(selectedItem);
SelectedItem = null;
}