async void HardwareButtons_BackPressed_DetailPage(object sender, BackPressedEventArgs e)
{
e.Handled = true;
if (string.IsNullOrEmpty(ViewModel.Tasks.Title))
{
NavigateHelper.NavigateToPage(typeof(MainPage));
return;
}
//此处最好进行一个判断，是更新还是新增操作，然后进行相关的数据库操作
Task taskNeedAwait = null;
FrameTransitionParam param = new FrameTransitionParam();
if (this.IsNavigateForUpdate)//true表示更新
{
// 修改的数据
param.UpdateTasks = ViewModel.Tasks;
taskNeedAwait = ViewModel.UpdateTasks();
}
else//false 表示新增
{
param.NewTasks = ViewModel.Tasks;
taskNeedAwait = ViewModel.AddTasks();
}
// 在跳转前取消注册
HardwareButtons.BackPressed -= HardwareButtons_BackPressed_DetailPage;
NavigateHelper.NavigateToPageWithParam(typeof(MainPage), param);
await taskNeedAwait;
}
public async static void NavigateToPageWithParam(Type type, FrameTransitionParam param)
{
var frame = Window.Current.Content as Frame;
await Window.Current.Dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal, () =>
{
frame.Navigate(type, param);
});
}
private void TasksListItemContent_Tapped(object sender, TappedRoutedEventArgs e)
{
e.Handled = true;
var taskItemControl = sender as TasksItemControl;
if (taskItemControl == null)
{
return;
}
var tasksItem = taskItemControl.DataContext as Tasks;
FrameTransitionParam param = new FrameTransitionParam { Tasks = tasksItem };
NavigateHelper.NavigateToPageWithParam(typeof(TasksDetailPageSimple), param);
}
///// <summary>
///// 点击任务列表，跳转taskdetail页面
///// </summary>
///// <param name="sender"></param>
///// <param name="e"></param>
//private void TasksListItem_Clicked(object sender, ItemClickEventArgs e)
//{
// //与修改要有一个标识进行区分,标识就是判断是否存在tasks
// FrameTransitionParam param = new FrameTransitionParam { Projects = ViewModel.ProjectsSelected as Projects, Tasks = e.ClickedItem as Tasks };
// NavigateHelper.NavigateToPageWithParam(typeof(TasksDetailPageSimple), param);
//}
/// <summary>
/// 点击新增按钮
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void AppBarAdd_Clicked(object sender, RoutedEventArgs e)
{
//与修改要有一个标识进行区分,可以创建一个临时对象，进行数据传递
FrameTransitionParam param = new FrameTransitionParam { Projects = ViewModel.ProjectsSelected as Projects };
NavigateHelper.NavigateToPageWithParam(typeof(TasksDetailPageSimple), param);
}
private async Task DealWithFrameTransitionParam(FrameTransitionParam param)
{
if (param != null)
{
if (param.TasksIdFromToast != null)
{
var toastTasks = ViewModel.Tasks.FirstOrDefault(t => t.Id == param.TasksIdFromToast);
if (toastTasks == null)
{
await MessageDialogHelper.MessageDialogShowAsync("该任务已在其他端被删除", "提示");
}
else
{
ViewModel.ToastTasks = toastTasks;
this.txtToastTasksTitle.Text = ViewModel.ToastTasks.Title;
this.txtToastTasksDueTime.Text = ViewModel.ToastTasks.DueDate.ToString();
this.cmbToastTasksSnooze.ItemsSource = SelectionListEnum.SnoozeBackTimeSelectionList;
this.cmbToastTasksSnooze.DisplayMemberPath = "Name";
this.cmbToastTasksSnooze.SelectedValuePath = "SnoozeBackValue";
if (this.cmbToastTasksSnooze.SelectedIndex == -1)
{
this.cmbToastTasksSnooze.SelectedIndex = 0;
}
this.popupToastTasksDetail.Width = Window.Current.Bounds.Width;
this.popupToastTasksDetail.Visibility = Windows.UI.Xaml.Visibility.Visible;
this.popupToastTasksDetail.IsOpen = true;
}
}
//从修改页面传过来的数据，为了不再从数据库重新查一次。
if (param.NewTasks != null)
{
ViewModel.Tasks.Add(param.NewTasks);
}
if (param.UpdateTasks != null)
{
var oldTasks = ViewModel.Tasks.FirstOrDefault(t => t.Id == param.UpdateTasks.Id);
if (oldTasks != null)
{
ViewModel.Tasks.Remove(oldTasks);
}
ViewModel.Tasks.Insert(0, param.UpdateTasks);
}
}
}