更新
ShowDetailPage末端的枢轴的IsLocked属性由于某种原因而干扰了控件的加载。 我有2个父选项卡，可以为每个选项卡创建一个子选项卡，并且在创建子选项卡时将其锁定。子选项卡添加在父选项卡索引旁边。
我有一个UWP应用程序，它具有枢轴控制菜单系统。我们有一个顶层和一个第二层。在第二级中，某些屏幕将通过按钮命令创建一个视图，以进入添加/编辑视图，该视图被锁定，直到单击关闭的按钮后，该视图才返回到其父菜单屏幕。
由于某种原因，当我关闭添加/编辑视图时，某些线程没有立即关闭，因此需要花费一些时间来关闭一些线程。尝试进入另一个父选项卡的“添加/编辑”视图时，这会产生问题。基本上，视图是在控件加载之前初始化的。
ShowDetailPage方法是我在视图的按钮命令中用来打开添加/编辑视图的方法。 CloseDetailPage方法是我们离开屏幕的方式。该指示器告诉我这是一个线程问题，页面转移错误仅在进入屏幕之前将控件属性“初始化”设置为true时才会发生。 （正确传输时，该属性为false）。另外，如果我观看诊断输出，如果我等待一小段时间，则在关闭视图后，我将看到一些线程关闭，然后初始化的属性始终为false，并且我可以正确地移动。
这是我在创建错误并解决该错误时注意到的模式。 https://imgur.com/a/osgRUCx 我关闭添加/编辑屏幕后不久，这些主题就会关闭。只有关闭这些窗口，我才能正确转移到另一个添加/编辑视图。
我该怎么做才能找出导致该问题的线程？（我可以看到内存位置，但在线程关闭时看不到线程）。
如果我可以找到线程，该如何做才能等待线程关闭，然后再将屏幕转移到其中？
NavigationUtility，用于处理新屏幕的显示和关闭。
internal static void ShowDetailPage(long customerId, BaseControl control, string parentPageTitle, string detailPageTitle)
{
try
{
Pivot p = MainPage.GetPivot();
Utility u = new Utility();
for (int i = 1; i < p.Items.Count; i++)
{
long customerIdFromPivot = (((p.Items[i] as PivotItem).Content) as Menus).ParentCustomer.CustomerId;
if (CustomerIdFromPivot == CustomerId)
{
var topMenuItem = (((p.Items[i] as PivotItem).Content) as Menus).GetPivot();
if (TopLevelPivots.ContainsKey(CustomerId))
{
TopLevelPivots[CustomerId] = topMenuItem;
}
else
{
TopLevelPivots.Add(CustomerId, topMenuItem);
}
TopLevelPivots[CustomerId].IsLocked = true;
SearchInVisualTree(topMenuItem, CustomerId, parentPageTitle);
var submenus = SecondLevelPivots[CustomerId].ItemsSource;
ObservableCollection<MenuItem> addedMenus = new ObservableCollection<MenuItem>();
int index = 0;
foreach (var subMenuItem in submenus as IEnumerable<MenuItem>)
{
addedMenus.Add(subMenuItem);
if (subMenuItem.HeaderTitle == parentPageTitle)
{
if (DetailScreenParentIndex.ContainsKey(CustomerId))
DetailScreenParentIndex.Remove(CustomerId);
DetailScreenParentIndex.Add(CustomerId, index);
addedMenus.Add(new MenuItem() { HeaderTitle = detailPageTitle, Content = u.GetInitializedControl(control, control.ParentCustomer, addedMenus.Count), ParentCustomer = control.ParentCustomer });
}
index++;
}
SecondLevelPivots[CustomerId].ItemsSource = addedMenus;
//if (DetailScreenParentIndex.ContainsKey(CustomerId))
SecondLevelPivots[CustomerId].SelectedIndex = DetailScreenParentIndex[CustomerId] + 1;
//else
// SecondLevelPivots[CustomerId].SelectedIndex = 0;
SecondLevelPivots[CustomerId].IsLocked = true;
}
}
}
catch (Exception e)
{
}
}
internal static void CloseDetailPage(long CustomerId, string currentPage, string gotoPage)
{
try
{
Pivot p = MainPage.GetPivot();
Utility u = new Utility();
for (int i = 1; i < p.Items.Count; i++)
{
long CustomerIdFromPivot = (((p.Items[i] as PivotItem).Content) as Menus).ParentCustomer.CustomerId;
if (CustomerIdFromPivot == CustomerId)
{
var topMenuItem = (((p.Items[i] as PivotItem).Content) as Menus).GetPivot();
if (TopLevelPivots.ContainsKey(CustomerId))
{
TopLevelPivots[CustomerId] = topMenuItem;
}
else
{
TopLevelPivots.Add(CustomerId, topMenuItem);
}
TopLevelPivots[CustomerId].IsLocked = false;
SearchInVisualTree(topMenuItem, CustomerId, gotoPage);
var submenus = SecondLevelPivots[CustomerId].ItemsSource;
ObservableCollection<MenuItem> addedMenus = new ObservableCollection<MenuItem>();
foreach (var submenuItem in submenus as IEnumerable<MenuItem>)
{
if (submenuItem.HeaderTitle != currentPage)
{
addedMenus.Add(submenuItem);
}
}
SecondLevelPivots[CustomerId].ItemsSource = addedMenus;
SecondLevelPivots[CustomerId].SelectedIndex = DetailScreenParentIndex[claimantId];
SecondLevelPivots[CustomerId].IsLocked = false;
SecondLevelPivots.Remove(CustomerId);
TopLevelPivots.Remove(CustomerId);
DetailScreenParentIndex.Remove(CustomerId);
}
}
}
catch (Exception ex)
{
Utility.LogError(ex);
}
}
ViewModel （单击按钮的命令）转到新屏幕。
private void AddCustomerCommandExecute(object obj)
{
bool bEditing = false;
AddEditCustomer control = new AddEditCustomer();
control.ParentCustomer = ParentCustomer;
CustomerDetails customerDetail = obj as CustomerDetails ;
if (customerDetail == null)
{
customerDetail = new CustomerDetails() { };
}
customerDetail.Customer = ParentCustomer;
control.CustomerDetailsForAddEdit = customerDetail;
customerDetail.IsEdit = bEditing;
control.PropertyChanged += CustomersForAddEdit_PropertyChanged;
Utility u = new Utility();
NavigationUtility.ShowDetailPage(ParentCustomer.customerId, u.GetInitializedControl(control, ParentCustomer, 0), "Customers", "Add Customer");
}
查看背后的代码以获取添加/修改的屏幕
public sealed partial class AddEditCustomer : BaseControl
{
public AddEditCustomerVM Model { get; set; }
public CustomerDetails CustomerDetailsForAddEdit
{
get { return (CustomerDetails )GetValue(CustomerDetailsForAddEditProperty); }
set
{
SetValue(CustomerDetailsForAddEditProperty, value);
OnPropertyChanged("CustomerDetailsForAddEdit");
}
}
public static readonly DependencyProperty CustomerDetailsForAddEditProperty =
DependencyProperty.Register("CustomerDetailsForAddEdit", typeof(CustomerDetails), typeof(AddEditCustomer), null);
public AddEditCustomer()
{
this.InitializeComponent();
var resource = Resources.FirstOrDefault(aa => aa.Key.ToString() == "AddEditCustomerVM");
if (resource.Value != null)
{
Binding b = new Binding();
b.Mode = BindingMode.TwoWay;
b.Path = new PropertyPath("CustomerDetailsForAddEdit");
b.Source = (resource.Value as AddEditCustomerVM);
Model = (resource.Value as AddEditCustomerVM);
this.SetBinding(CustomerDetailsForAddEditProperty, b);
(resource.Value as AddEditCustomerVM).PropertyChanged += AddEditView_PropertyChanged;
Binding bindVal = new Binding();
bindVal.Mode = BindingMode.TwoWay;
bindVal.Path = new PropertyPath("ParentCustomer");
bindVal.Source = (resource.Value as AddEditCustomerVM);
this.SetBinding(ParentCustomerProperty, bindVal);
}
}
private void AddEditView_PropertyChanged(object sender, System.ComponentModel.PropertyChangedEventArgs e)
{
OnPropertyChanged(e.PropertyName);
}
private void dpStartDate_DateChanged(CalendarDatePicker sender, CalendarDatePickerDateChangedEventArgs args)
{
if (dpEndDate.Date.HasValue)
{
if (args.NewDate.Value > dpEndDate.Date.Value)
dpEndDate.Date = null;
}
}
}