Prism RequestNavigate not working in a Popup window [duplicate] - wpf

Question

I have a ShellView using interactivity objects with prism's PopupWindowAction for show my custom settings view. And my ShellViewModel contain InteractionRequest object and a Delegate Command that will fire the user interaction. After user fired interaction, custom settings view (DataFeedManagerView) appear center of ShellView. In My DataFeedManagerView, there is a list of DataFeeds (ListBox control) on the left side and there is datafeed specific settings view (ContentControl with set Region via RegionManager) on the right side. First, i registered all Views with RegisterViewWithRegion. Then what i try to do is activate related object settings view within content control via Region's Activate method. When i try to do like this, i'm receiving an error "can not find region". So we can not use regions inside custom popup window???
PS1: Maybe this is so simple requirement but containing many steps because of that my explanation was a little bit complicated. I hope code will be more descriptive.
PS2: I meet expectations with using simple binding to ContentControl's content property. But i'm worry about what is my mistake and/or right solution for use regions inside custom interaction popup window.
..::Shell::..
<Window x:Class="PrismUnityApp.Views.ShellView"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:i="http://schemas.microsoft.com/expression/2010/interactivity"
xmlns:views="clr-namespace:PrismUnityApp.Views"
xmlns:constants="clr-namespace:PrismUnityApp.Constants"
xmlns:prism="http://prismlibrary.com/"
prism:ViewModelLocator.AutoWireViewModel="True"
Title="{Binding Title}" Height="480" Width="640">
<DockPanel LastChildFill="True">
<i:Interaction.Triggers>
<prism:InteractionRequestTrigger SourceObject="{Binding ConfirmationRequest}">
<prism:PopupWindowAction IsModal="True" CenterOverAssociatedObject="True">
<prism:PopupWindowAction.WindowContent>
<views:DataFeedManagerView/>
</prism:PopupWindowAction.WindowContent>
</prism:PopupWindowAction>
</prism:InteractionRequestTrigger>
</i:Interaction.Triggers>
<Button Content=" Show Data Feed Manager" Command="{Binding ShowDataFeedManagerCommand}"/>
<ContentControl prism:RegionManager.RegionName="{x:Static constants:WellKnownRegionNames.ContentRegion}" />
</DockPanel>
using System.Windows.Input;
using Prism.Commands;
using Prism.Interactivity.InteractionRequest;
using Prism.Mvvm;
namespace PrismUnityApp.ViewModels
{
public class ShellViewModel : BindableBase
{
private string _title = "Prism Unity Application";
public ICommand ShowDataFeedManagerCommand { get; }
public InteractionRequest<IConfirmation> ConfirmationRequest { get; }
public string Title
{
get { return _title; }
set { SetProperty(ref _title, value); }
}
public ShellViewModel()
{
ConfirmationRequest = new InteractionRequest<IConfirmation>();
ShowDataFeedManagerCommand = new DelegateCommand(ShowDataFeedManager);
}
public void ShowDataFeedManager()
{
ConfirmationRequest.Raise(
new Confirmation {Title = "Data Feed Manager", Content = string.Empty},
confirmation =>
{
});
}
}
}
..::DataFeedManager::..
<UserControl x:Class="PrismUnityApp.Views.DataFeedManagerView"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:constants="clr-namespace:PrismUnityApp.Constants"
xmlns:prism="http://prismlibrary.com/"
xmlns:i="http://schemas.microsoft.com/expression/2010/interactivity"
prism:ViewModelLocator.AutoWireViewModel="True"
Height="240" Width="320">
<DockPanel LastChildFill="True">
<ListBox
SelectedItem="{Binding Current, Mode=OneWay}"
ItemsSource="{Binding DataFeeds}">
<i:Interaction.Triggers>
<i:EventTrigger EventName="SelectionChanged">
<prism:InvokeCommandAction
Command="{Binding SelectionChangedCommand}"
CommandParameter="{Binding SelectedItem, RelativeSource={RelativeSource Self}}"></prism:InvokeCommandAction>
</i:EventTrigger>
</i:Interaction.Triggers>
<ListBox.ItemTemplate>
<DataTemplate>
<TextBlock Text="{Binding Key}"></TextBlock>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
<ContentControl prism:RegionManager.RegionName="{x:Static constants:WellKnownRegionNames.DataFeedRegion}"></ContentControl>
</DockPanel>
using System.Collections.Generic;
using System.Linq;
using System.Windows.Controls;
using System.Windows.Input;
using Microsoft.Practices.Unity;
using Prism.Commands;
using Prism.Mvvm;
using Prism.Regions;
using PrismUnityApp.Constants;
using PrismUnityApp.Interfaces;
namespace PrismUnityApp.ViewModels
{
public class DataFeedManagerViewModel : BindableBase, IDataFeedManagerViewModel
{
private readonly IRegionManager _regionManager;
public IDictionary<string, object> DataFeeds { get; }
public ICommand SelectionChangedCommand { get; }
public DataFeedManagerViewModel(IUnityContainer unityContainer, IRegionManager regionManager)
{
_regionManager = regionManager;
SelectionChangedCommand = new DelegateCommand<SelectionChangedEventArgs>(SelectionChanged);
DataFeeds = new Dictionary<string, object>
{
{WellKnownDataFeedNames.SimulationDataFeed, unityContainer.Resolve<ISimulationDataFeedView>()},
{WellKnownDataFeedNames.BarchartDataFeed, unityContainer.Resolve<IBarchartDataFeedView>()}
};
foreach (var dataFeed in DataFeeds)
_regionManager.RegisterViewWithRegion(WellKnownRegionNames.DataFeedRegion, () => dataFeed.Value);
}
public void SelectionChanged(SelectionChangedEventArgs e)
{
var addedItem = (KeyValuePair<string, object>) e.AddedItems[0];
var region = _regionManager.Regions[WellKnownRegionNames.DataFeedRegion];
region.Activate(addedItem.Value);
}
}
}
..::Bootstrapper::..
using System.Windows;
using Microsoft.Practices.Unity;
using Prism.Unity;
using PrismUnityApp.Interfaces;
using PrismUnityApp.ViewModels;
using PrismUnityApp.Views;
namespace PrismUnityApp
{
class Bootstrapper : UnityBootstrapper
{
#region Overrides of UnityBootstrapper
protected override void ConfigureContainer()
{
base.ConfigureContainer();
Container.RegisterType<ISimulationDataFeedView, SimulationDataFeedView>();
Container.RegisterType<ISimulationDataFeedViewModel, SimulationDataFeedViewModel>();
Container.RegisterType<IBarchartDataFeedView, BarchartDataFeedView>();
Container.RegisterType<IBarchartDataFeedViewModel, BarchartDataFeedViewModel>();
Container.RegisterType<IDataFeedManagerView, DataFeedManagerView>();
Container.RegisterType<IDataFeedManagerViewModel, DataFeedManagerViewModel>();
}
protected override DependencyObject CreateShell()
{
return Container.Resolve<ShellView>();
}
protected override void InitializeShell()
{
Application.Current.MainWindow.Show();
}
#endregion
}
}

Answer 1

Probably you need to set the region manager manually, in the popup view's code behind (constructor), like this:
RegionManager.SetRegionName( theNameOfTheContentControlInsideThePopup, WellKnownRegionNames.DataFeedRegion );
RegionManager.SetRegionManager( theNameOfTheContentControlInsideThePopup, theRegionManagerInstanceFromUnity );
You'll have to assign a name to the content control hosting the region and somehow acquire the region manager (ServiceLocator.Current.GetInstance<IRegionManager>()).