private async void 全部_Clicked(object sender, EventArgs e)
{
TrainingDatabase itemDataBase = TrainingDatabase.getDatabase();
List <Training> itemList = await itemDataBase.GetItemsAsync();
listView.ItemsSource = itemList;
}
protected override async void OnAppearing()
{
TrainingDatabase itemDataBase = TrainingDatabase.getDatabase();
List <Training> itemList;
itemList = await itemDataBase.GetItemsAsync();
if (itemList.Count < 1)
{
await storeInitialData(itemDataBase);
itemList = await itemDataBase.GetItemsAsync();
}
// ListViewを生成する
listView.ItemsSource = itemList;
}