Prism pops up in a new window in WPF

Question

How can I open or close a new window in WPF without violating the rules of the MVVM template?
I just want to emulate the entry module in ms office perspective.

I already read this article , but there is an error while passing the parameterconfirmation

I am currently using prism 5.0.

Answer 1

Update
What made me answer another question, because it is the inability to use the accepted answer to my project that uses Prism 6 ,
but after he placed the original answer (see. Below) and discussed it in I found that the main problem was in the following: Prism 6 changed the namespaces of some classes, all the classes that were used in the accepted answer still exist in Prism 6 , but in other dlls and namespaces
So, if you use Prism 6 , you can apply the accepted answer with these changes

replace these names first.

xmlns:i="clr-namespace:System.Windows.Interactivity;assembly=System.Windows.Interactivity"
xmlns:pi="clr-namespace:Microsoft.Practices.Prism.Interactivity;assembly=Microsoft.Practices.Prism.Interactivity"
xmlns:pit="clr-namespace:Microsoft.Practices.Prism.Interactivity.InteractionRequest;assembly=Microsoft.Practices.Prism.Interactivity"

with the following namespaces

xmlns:i="http://schemas.microsoft.com/expression/2010/interactivity"
xmlns:prism="http://prismlibrary.com/"

second upgrade xaml as follows

<Button Content="Options" Command="{Binding OpenConnectionOptionsCommand}">
    <i:Interaction.Triggers>
        <prism:InteractionRequestTrigger SourceObject="{Binding OptionSettingConfirmationRequest, Mode=OneWay}" >
            <prism:PopupWindowAction>
                <prism:PopupWindowAction.WindowContent>
                    <views:CustomPopupView />
                </prism:PopupWindowAction.WindowContent>
            </prism:PopupWindowAction>
        </prism:InteractionRequestTrigger>
    </i:Interaction.Triggers>
</Button>

1
, , ( <views:CustomPopupWindow>), .

2
, Prism 6. ( ) dll, , Prism 6.

3
, dll Prism.Wpf, Nuget.

</" >
Prism 5, , Prism 6.

, , ( ), .

.

ViewModel

public class ViewModel : BindableBase
{
    public ViewModel()
    {
        _showWindowCommand = new DelegateCommand(ShowWindow);
        _interactionRequest = new InteractionRequest<Confirmation>();
    }

    private readonly DelegateCommand _showWindowCommand;
    private InteractionRequest<Confirmation> _interactionRequest;

    public ICommand ShowWindowCommand
    {
        get { return _showWindowCommand; }
    }

    public IInteractionRequest InteractionRequest
    {
        get { return _interactionRequest; }
    }

    private void ShowWindow()
    {
        _interactionRequest.Raise(
            new Confirmation(),
            OnWindowClosed);
    }

    private void OnWindowClosed(Confirmation confirmation)
    {
        if (confirmation.Confirmed)
        {
            //perform the confirmed action...
        }
        else
        {

        }
    }
}

XAML

<Button Command="{Binding ShowWindowCommand}" Content="Show Window" >
    <i:Interaction.Triggers>
        <i:EventTrigger EventName="Raised" SourceObject="{Binding InteractionRequest}">
            <i:EventTrigger.Actions>
                <local:ShowWindowAction></local:ShowWindowAction>
            </i:EventTrigger.Actions>
        </i:EventTrigger>
    </i:Interaction.Triggers>
</Button>

xmlns:i="http://schemas.microsoft.com/expression/2010/interactivity"
xmlns:local="clr-namespace:The namespace which contains the ShowWindowAction">

ActionTrigger

using System;
using Prism.Interactivity.InteractionRequest;
using System.Windows.Interactivity;
using System.Windows;

public class ShowWindowAction : TriggerAction<FrameworkElement>
{
    protected override void Invoke(object parameter)
    {
        InteractionRequestedEventArgs args = parameter as InteractionRequestedEventArgs;
        if (args != null)
        {
            Confirmation confirmation = args.Context as Confirmation;
            if (confirmation != null)
            {
                // Replace ParametersWindow with your own window.
                ParametersWindow window = new ParametersWindow();
                EventHandler closeHandler = null;
                closeHandler = (sender, e) =>
                {
                    window.Closed -= closeHandler;
                    args.Callback();
                };
                window.Closed += closeHandler;
                window.Show();
            }
        }
    }
}

• Prism.Core Prism.Wpf dlls ( ), .
• ShowWindow, Invoke ShowWindowAction, .
• OnWindowClosed, ShowWindowAction, , .

Answer 2

, Prism 5.0 ( , 6.0 ), InteractionRequest<T>, .

- , ( ) / .

public class ShellViewModel : BindableBase
{
    private readonly IRegionManager regionManager;

    public ShellViewModel(IRegionManager regionManager)
    {
        if (regionManager == null)
            throw new ArgumentNullException("regionManager");

        this.regionManager = regionManager;
        this.OptionSettingConfirmationRequest = new InteractionRequest<IConfirmation>();

        openConnectionOptionsCommand = new DelegateCommand(RaiseConnectionOptionsRequest);
    }

    public InteractionRequest<IConfirmation> OptionSettingConfirmationRequest { get; private set; }

    private readonly ICommand openConnectionOptionsCommand;
    public ICommand OpenConnectionOptionsCommand { get { return openConnectionOptionsCommand; } }

    private void RaiseConnectionOptionsRequest()
    {
        this.OptionSettingConfirmationRequest.Raise(new Confirmation { Title = "Options not saved. Do you wish to save?" }, OnConnectionOptionsResponse);
    }

    protected virtual void OnConnectionOptionsResponse(IConfirmation context)
    {
        if(context.Confirmed)
        {
            // save it
        }

        // otherwise do nothing
    }
}

XAML -

<Button Content="Options" Command="{Binding OpenConnectionOptionsCommand}">
    <i:Interaction.Triggers>
        <pit:InteractionRequestTrigger SourceObject="{Binding OptionSettingConfirmationRequest, Mode=OneWay}" >
            <pie:LazyPopupWindowAction RegionName="ConnectionSettings" 
                                NavigationUri="ConnectionSettingsView" IsModal="True" />
        </pit:InteractionRequestTrigger>
    </i:Interaction.Triggers>
</Button>

PopupWindowAction (. github ) LazyPopupWindowAction, ConnectionSettingsView . , , PopupWindowAction, , .

. IConfirmation INotification .

XAML PopupWindowAction

<Button Content="Options" Command="{Binding OpenConnectionOptionsCommand}">
    <i:Interaction.Triggers>
        <pit:InteractionRequestTrigger SourceObject="{Binding OptionSettingConfirmationRequest, Mode=OneWay}" >
            <pi:PopupWindowAction>
                <pi:PopupWindowAction.WindowContent>
                    <views:CustomPopupView />
                </pi:PopupWindowAction.WindowContent>
            </pi:PopupWindowAction>
        </pit:InteractionRequestTrigger>
    </i:Interaction.Triggers>
</Button>

xmlns:i="clr-namespace:System.Windows.Interactivity;assembly=System.Windows.Interactivity"
xmlns:pi="clr-namespace:Microsoft.Practices.Prism.Interactivity;assembly=Microsoft.Practices.Prism.Interactivity"
xmlns:pit="clr-namespace:Microsoft.Practices.Prism.Interactivity.InteractionRequest;assembly=Microsoft.Practices.Prism.Interactivity"
xmlns:pie="clr-namespace:MyProject.UI.Prism.Interactivity;assembly=MyProject.UI"

Update: LazyPopupWindowAction, GitHub Gist. PopupWindowAction Prims 5 ( Prism, Prism 6, , ) , Region and Navigation , -, .

, , , viewmodel Shell, ViewModel , ( ).