DialogHost Disappears Question

还没有人认领这个 Issue。

Hi,

I started using DialogHost to popup a dialog to edit some properties of a currently selected item.
However if I switch dialogs while the Edit dialog is displayed, and then return back
the Edit dialog disappears and all I see is the gray parent dialog and no way to recover.

In MainWindows.xaml I have:

Basically the same structure as the MaterialDesign demo, where I have a DrawerHost to popup
the main menu views that you can select from (Home, Inventory, Billing, etc.)
One of the menu items is "Inventory"

In InventoryViewControl.xaml I have another DialogHost so I can popup edit controls for selected items.

In the ViewModel for the InventoryViewControl I have:

private async void OnEditOwnerDialog(object _)
{
// The view associated with this model is defined in InventoryViewControl.xaml !!
var model = new OwnerViewControlModel(SelectedOwnerId);
object result = await MaterialDesignThemes.Wpf.DialogHost.Show(model, "Inventory");
SaveOrCancel answer = (SaveOrCancel)(result ?? SaveOrCancel.None);
switch(answer)
{

In the picture below, showing the RootDialog Drawer menu, the Inventory in the background
and the Owner Information from the OwnerViewControl showing.

If I select "Billing" it switches to Billing, and then when I come back to "Inventory"
all I see is the gray inventory and the OwnerViewControl is not showing and no way to
get it.

Is there an event that I can use to make it pop back up, or would it better to try
to prevent the RootDialog from being able to select a different item?


Thoughts?

从 MainWindows.xaml 和 InventoryViewControl.xaml 开始，重点关注标识为 RootDialog 和 Inventory 的嵌套 DialogHost 元素。在 Inventory 和 Billing 视图之间切换时，跟踪 OnEditOwnerDialog 调用到 DialogHost.Show 的过程。Done 应定义并验证返回 Inventory 时的预期行为：所有者对话框仍可恢复，或适当地阻止导航。

由索引模型根据 Issue 内容生成。