Prism 应用系列(二) MVVM架构中，MainWindow.xaml文件与MainWindowViewModel.cs的绑定使用

因为在MainWindow.xaml需要绑定MainWindowViewModel.cs的属性，两个文件的管理，是通过下面的代码实现的。

xmlns:prism="http://prismlibrary.com/"
prism:ViewModelLocator.AutoWireViewModel="True"

 MainWindow.xaml：

<Window x:Class="UsingPopupWindowAction.Views.MainWindow"
        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:UsingPopupWindowAction.Views"
        xmlns:prism="http://prismlibrary.com/"
        prism:ViewModelLocator.AutoWireViewModel="True"
        Title="{Binding Title}" Height="350" Width="525">
    <i:Interaction.Triggers>
        <prism:InteractionRequestTrigger SourceObject="{Binding NotificationRequest}">
            <prism:PopupWindowAction IsModal="True" CenterOverAssociatedObject="True" />
        </prism:InteractionRequestTrigger>
        <prism:InteractionRequestTrigger SourceObject="{Binding ConfirmationRequest}">
            <prism:PopupWindowAction IsModal="True" CenterOverAssociatedObject="True" />
        </prism:InteractionRequestTrigger>
        <prism:InteractionRequestTrigger SourceObject="{Binding CustomPopupRequest}">
            <prism:PopupWindowAction IsModal="True" CenterOverAssociatedObject="True">
                <prism:PopupWindowAction.WindowContent>
                    <views:CustomPopupView />
                </prism:PopupWindowAction.WindowContent>
            </prism:PopupWindowAction>
        </prism:InteractionRequestTrigger>
        
        <prism:InteractionRequestTrigger SourceObject="{Binding CustomNotificationRequest}">
            <prism:PopupWindowAction IsModal="True" CenterOverAssociatedObject="True">
                <prism:PopupWindowAction.WindowContent>
                    <views:ItemSelectionView />
                </prism:PopupWindowAction.WindowContent>
            </prism:PopupWindowAction>
        </prism:InteractionRequestTrigger>
        
    </i:Interaction.Triggers>
    <StackPanel>
        <Button Margin="5" Content="Raise Default Notification" Command="{Binding NotificationCommand}" />
        <Button Margin="5" Content="Raise Default Confirmation" Command="{Binding ConfirmationCommand}"/>
        <Button Margin="5" Content="Raise Custom Popup" Command="{Binding CustomPopupCommand}"/>
        <Button Margin="5" Content="Raise Custom Interaction" Command="{Binding CustomNotificationCommand}"/>

        <TextBlock Text="{Binding Title}" Margin="25" HorizontalAlignment="Center" FontSize="24" />
    </StackPanel>
</Window>

MainWindowViewModel.cs：

using System;
using Prism.Commands;
using Prism.Interactivity.InteractionRequest;
using Prism.Mvvm;
using UsingPopupWindowAction.Notifications;

namespace UsingPopupWindowAction.ViewModels
{
    public class MainWindowViewModel : BindableBase
    {
        private string _title = "Prism Unity Application";
        public string Title
        {
            get { return _title; }
            set { SetProperty(ref _title, value); }
        }

        public InteractionRequest<INotification> NotificationRequest { get; set; }
        public DelegateCommand NotificationCommand { get; set; }

        public InteractionRequest<IConfirmation> ConfirmationRequest { get; set; }
        public DelegateCommand ConfirmationCommand { get; set; }

        public InteractionRequest<INotification> CustomPopupRequest { get; set; }
        public DelegateCommand CustomPopupCommand { get; set; }

        public InteractionRequest<ICustomNotification> CustomNotificationRequest { get; set; }
        public DelegateCommand CustomNotificationCommand { get; set; }

        public MainWindowViewModel()
        {
            NotificationRequest = new InteractionRequest<INotification>();
            NotificationCommand = new DelegateCommand(RaiseNotification);

            ConfirmationRequest = new InteractionRequest<IConfirmation>();
            ConfirmationCommand = new DelegateCommand(RaiseConfirmation);

            CustomPopupRequest = new InteractionRequest<INotification>();
            CustomPopupCommand = new DelegateCommand(RaiseCustomPopup);

            CustomNotificationRequest = new InteractionRequest<ICustomNotification>();
            CustomNotificationCommand = new DelegateCommand(RaiseCustomInteraction);
        }

        void RaiseNotification()
        {
            NotificationRequest.Raise(new Notification { Content = "Notification Message", Title = "Notification" }, r => Title = "Notified");
        }

        void RaiseConfirmation()
        {
            ConfirmationRequest.Raise(new Confirmation { Title = "Confirmation", Content = "Confirmation Message" }, r => Title = r.Confirmed ? "Confirmed" : "Not Confirmed");
        }

        void RaiseCustomPopup()
        {
            CustomPopupRequest.Raise(new Notification { Title = "Custom Popup", Content = "Custom Popup Message " }, r => Title = "Good to go");
        }

        /// <summary>
        /// 通知请求
        /// </summary>
        private void RaiseCustomInteraction()
        {
            CustomNotificationRequest.Raise(new CustomNotification { Title = "Custom Notification" }, r =>
                {
                    if (r.Confirmed && r.SelectedItem != null)
                        Title = $"User selected: { r.SelectedItem}";
                    else
                        Title = "User cancelled or didn't select an item";
                });
        }
    }
}