WPF Prism.Core version 9.0.537 implemented navigation register singleton with splash screen, pass global variable via RegisterSingleton method

Install-Package Prism.Core -v 9.0.537
Install-Package Prism.Wpf -v 9.0.537
Install-Package Prism.DryIoc -v 9.0.537

<prism:PrismApplication x:Class="WpfApp29.App"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:prism="http://prismlibrary.com/"
             ShutdownMode="OnExplicitShutdown">
    <prism:PrismApplication.Resources>
        <Style TargetType="TextBlock">
            <Setter Property="FontSize" Value="30"/>
            <Setter Property="HorizontalAlignment" Value="Center"/>
            <Setter Property="VerticalAlignment" Value="Center"/>
        </Style>
        <Style TargetType="TextBox">
            <Setter Property="FontSize" Value="30"/>
            <Setter Property="HorizontalAlignment" Value="Stretch"/>
            <Setter Property="VerticalAlignment" Value="Stretch"/>
        </Style>
    </prism:PrismApplication.Resources>
</prism:PrismApplication>

using Prism.DryIoc;
using Prism.Ioc;
using System.Windows;
using WpfApp29.ViewModels;
using WpfApp29.Views;

namespace WpfApp29
{
    public partial class App : PrismApplication
    {
        public App()
        {
            Application.Current.Dispatcher.UnhandledException += Dispatcher_UnhandledException;
            Application.Current.DispatcherUnhandledException += Current_DispatcherUnhandledException;
        }

        protected override void OnStartup(StartupEventArgs e)
        {
            var splash = new SplashWin();
            splash.ShowDialog();
            base.OnStartup(e);
        }

        private void Current_DispatcherUnhandledException(object sender, System.Windows.Threading.DispatcherUnhandledExceptionEventArgs e)
        {
            string exMsg = $"{DateTime.Now},{e.Exception.StackTrace}";
            MessageBox.Show(exMsg);
            e.Handled = true;
        }

        private void Dispatcher_UnhandledException(object sender, System.Windows.Threading.DispatcherUnhandledExceptionEventArgs e)
        {
            string exMsg = $"{DateTime.Now},{e.Exception.StackTrace}";
            MessageBox.Show(exMsg);
            e.Handled = true;
        }

        protected override Window CreateShell()
        {
            return new MainWin();
        }

        protected override void RegisterTypes(IContainerRegistry containerRegistry)
        {
            containerRegistry.RegisterSingleton<BooksViewModel>();
            //containerRegistry.RegisterForNavigation<MainWin,MainWinViewModel>();
            containerRegistry.RegisterForNavigation<Books, BooksViewModel>("Books");            
            containerRegistry.RegisterForNavigation<AddBook, AddBookViewModel>("AddBook");
            containerRegistry.RegisterForNavigation<EditBooks, EditBooksViewModel>("EditBook");
        }

        protected override void ConfigureRegionAdapterMappings(RegionAdapterMappings regionAdapterMappings)
        {
            base.ConfigureRegionAdapterMappings(regionAdapterMappings);
        }
    }
}

using System;
using System.Collections.Generic;
using System.Text;
using System.Windows;

namespace WpfApp29.ViewModels
{
    public class MainWinViewModel : BindableBase
    {
        private IRegionManager regionManager;
        private BooksViewModel booksVM;
        public DelegateCommand ViewBooksCommand => new DelegateCommand(ViewBooksCommandExecuted);
        public DelegateCommand AddBookCommand => new DelegateCommand(AddBookCommandExecuted);
        public DelegateCommand EditBookCommand => new DelegateCommand(EditBookCommandExecuted);

        private void AddBookCommandExecuted()
        {
            Navigate("AddBook");
        }

        private void EditBookCommandExecuted()
        {
            if(booksVM.SelectedBk==null)
            {
                MessageBox.Show("No book selected");
                return;
            }
            Navigate("EditBook");
        }

        private void ViewBooksCommandExecuted()
        {
            Navigate("Books");
        }

        public MainWinViewModel(IRegionManager regionManagerValue,BooksViewModel bookVMValue)
        {
            regionManager = regionManagerValue;
            booksVM = bookVMValue;
            NavigateOnLoaded();
        }

        private async void NavigateOnLoaded()
        {
            await Task.Delay(1);
            Navigate("Books");
        }

        private void Navigate(string viewName)
        {
            regionManager.RequestNavigate("ContentRegion", viewName);
        }
    }
}

//D:\C\WpfApp29\WpfApp29\App.xaml
<prism:PrismApplication x:Class="WpfApp29.App"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:prism="http://prismlibrary.com/"
             ShutdownMode="OnExplicitShutdown">
    <prism:PrismApplication.Resources>
        <Style TargetType="TextBlock">
            <Setter Property="FontSize" Value="30"/>
            <Setter Property="HorizontalAlignment" Value="Center"/>
            <Setter Property="VerticalAlignment" Value="Center"/>
        </Style>
        <Style TargetType="TextBox">
            <Setter Property="FontSize" Value="30"/>
            <Setter Property="HorizontalAlignment" Value="Stretch"/>
            <Setter Property="VerticalAlignment" Value="Stretch"/>
        </Style>
    </prism:PrismApplication.Resources>
</prism:PrismApplication>

//D:\C\WpfApp29\WpfApp29\App.xaml.cs
using Prism.DryIoc;
using Prism.Ioc;
using System.Windows;
using WpfApp29.ViewModels;
using WpfApp29.Views;

namespace WpfApp29
{
    public partial class App : PrismApplication
    {
        public App()
        {
            Application.Current.Dispatcher.UnhandledException += Dispatcher_UnhandledException;
            Application.Current.DispatcherUnhandledException += Current_DispatcherUnhandledException;
        }

        protected override void OnStartup(StartupEventArgs e)
        {
            var splash = new SplashWin();
            splash.ShowDialog();
            base.OnStartup(e);
        }

        private void Current_DispatcherUnhandledException(object sender, System.Windows.Threading.DispatcherUnhandledExceptionEventArgs e)
        {
            string exMsg = $"{DateTime.Now},{e.Exception.StackTrace}";
            MessageBox.Show(exMsg);
            e.Handled = true;
        }

        private void Dispatcher_UnhandledException(object sender, System.Windows.Threading.DispatcherUnhandledExceptionEventArgs e)
        {
            string exMsg = $"{DateTime.Now},{e.Exception.StackTrace}";
            MessageBox.Show(exMsg);
            e.Handled = true;
        }

        protected override Window CreateShell()
        {
            return new MainWin();
        }

        protected override void RegisterTypes(IContainerRegistry containerRegistry)
        {
            containerRegistry.RegisterSingleton<BooksViewModel>();
            //containerRegistry.RegisterForNavigation<MainWin,MainWinViewModel>();
            containerRegistry.RegisterForNavigation<Books, BooksViewModel>("Books");            
            containerRegistry.RegisterForNavigation<AddBook, AddBookViewModel>("AddBook");
            containerRegistry.RegisterForNavigation<EditBooks, EditBooksViewModel>("EditBook");
        }

        protected override void ConfigureRegionAdapterMappings(RegionAdapterMappings regionAdapterMappings)
        {
            base.ConfigureRegionAdapterMappings(regionAdapterMappings);
        }
    }
}

//D:\C\WpfApp29\WpfApp29\Views\SplashWin.xaml
<Window x:Class="WpfApp29.Views.SplashWin"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:WpfApp29.Views"
        mc:Ignorable="d"
        Title="SplashWin" WindowState="Maximized">
    <Grid>
        <Grid 
                MouseDown="Button_Click">
            <Grid.Background>
                <ImageBrush ImageSource="pack://application:,,,/WpfApp29;component/Resources/Images/333.jpg" />
            </Grid.Background>
        </Grid>
    </Grid>
</Window>

//D:\C\WpfApp29\WpfApp29\Views\SplashWin.xaml.cs

using System;
using System.Collections.Generic;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Shapes;

namespace WpfApp29.Views
{
    /// <summary>
    /// Interaction logic for SplashWin.xaml
    /// </summary>
    public partial class SplashWin : Window
    {
        public SplashWin()
        {
            InitializeComponent();
        }

        private void Button_Click(object sender, RoutedEventArgs e)
        {
            //DialogResult = true;
            this.Close();
        }
    }
}




//D:\C\WpfApp29\WpfApp29\Views\MainWin.xaml
<Window x:Class="WpfApp29.Views.MainWin"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:WpfApp29.Views"
        xmlns:prism="http://prismlibrary.com/"
        prism:ViewModelLocator.AutoWireViewModel="True"
        mc:Ignorable="d"
        Title="MainWin" WindowState="Maximized">
    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition Height="Auto"/>
            <RowDefinition Height="*"/>
        </Grid.RowDefinitions>

        <StackPanel Grid.Row="0" Orientation="Horizontal"
                    Margin="10" HorizontalAlignment="Left">
            <Button Content="BooksView" Command="{Binding ViewBooksCommand}" Margin="5"/>
            <Button Content="Add Book" Command="{Binding AddBookCommand}" Margin="5"/>
            <Button Content="Edit Book" Command="{Binding EditBookCommand}" Margin="5"/>
             
        </StackPanel>
        <ContentControl Grid.Row="1"
                        prism:RegionManager.RegionName="ContentRegion"
                        Margin="10"/>
    </Grid>
</Window>


//D:\C\WpfApp29\WpfApp29\ViewModels\MainWinViewModel.cs
using System;
using System.Collections.Generic;
using System.Text;
using System.Windows;

namespace WpfApp29.ViewModels
{
    public class MainWinViewModel : BindableBase
    {
        private IRegionManager regionManager;
        private BooksViewModel booksVM;
        public DelegateCommand ViewBooksCommand => new DelegateCommand(ViewBooksCommandExecuted);
        public DelegateCommand AddBookCommand => new DelegateCommand(AddBookCommandExecuted);
        public DelegateCommand EditBookCommand => new DelegateCommand(EditBookCommandExecuted);

        private void AddBookCommandExecuted()
        {
            Navigate("AddBook");
        }

        private void EditBookCommandExecuted()
        {
            if(booksVM.SelectedBk==null)
            {
                MessageBox.Show("No book selected");
                return;
            }
            Navigate("EditBook");
        }

        private void ViewBooksCommandExecuted()
        {
            Navigate("Books");
        }

        public MainWinViewModel(IRegionManager regionManagerValue,BooksViewModel bookVMValue)
        {
            regionManager = regionManagerValue;
            booksVM = bookVMValue;
            NavigateOnLoaded();
        }

        private async void NavigateOnLoaded()
        {
            await Task.Delay(1);
            Navigate("Books");
        }

        private void Navigate(string viewName)
        {
            regionManager.RequestNavigate("ContentRegion", viewName);
        }
    }
}


//D:\C\WpfApp29\WpfApp29\Views\AddBooks.xaml
<UserControl x:Class="WpfApp29.Views.AddBook"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
             xmlns:local="clr-namespace:WpfApp29.Views"
             mc:Ignorable="d" 
             d:DesignHeight="450" d:DesignWidth="800">
    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition/>
            <RowDefinition/>
            <RowDefinition/>
            <RowDefinition/>
        </Grid.RowDefinitions>
        <Grid.ColumnDefinitions>
            <ColumnDefinition/>
            <ColumnDefinition/>
        </Grid.ColumnDefinitions>
        <TextBlock Grid.Row="0" Grid.Column="0" Text="Id:"/>
        <TextBlock Grid.Row="0" Grid.Column="1" Text="{Binding NewBook.Id}"/>
        <TextBlock Grid.Row="1" Grid.Column="0" Text="Name:"/>
        <TextBox Grid.Row="1" Grid.Column="1" Text="{Binding NewBook.Name}"/>
        <TextBlock Grid.Row="2" Grid.Column="0" Text="ISBN:"/>
        <TextBox Grid.Row="2" Grid.Column="1" Text="{Binding NewBook.ISBN}"/>
        <Button Grid.Row="3" Grid.Column="0" Content="Cancel"
            Command="{Binding CancelCommand}"/>
        <Button Grid.Row="3" Grid.Column="1" Content="Save"
            Command="{Binding SaveCommand}"/>
    </Grid>
</UserControl>

//D:\C\WpfApp29\WpfApp29\ViewModels\AddBookViewModel.cs
using System;
using System.Collections.Generic;
using System.Text;
using WpfApp29.Models;

namespace WpfApp29.ViewModels
{
    public class AddBookViewModel : BindableBase,INavigationAware
    {
        private BooksViewModel booksVM;
        public DelegateCommand CancelCommand => new DelegateCommand(CancelCommandExecuted);

        public DelegateCommand SaveCommand => new DelegateCommand(SaveCommandExecuted);

        public AddBookViewModel(BooksViewModel booksVMValue)
        {
            booksVM = booksVMValue;
            InitNewBook();
        }

        private void CancelCommandExecuted()
        {
            return;
        }

        private void SaveCommandExecuted()
        {
            if (NewBook != null && NewBook.Id > 0)
            {
                booksVM.BooksCollection.Add(NewBook);
            }
            InitNewBook();
        }

        public void OnNavigatedTo(NavigationContext navigationContext)
        {
            InitNewBook();
        }

        private void InitNewBook()
        {
            NewBook = new Book(); 
            var lastBk = booksVM.BooksCollection.LastOrDefault();
            NewBook.Id = lastBk != null ? lastBk.Id + 1 : 1;
        }

        public bool IsNavigationTarget(NavigationContext navigationContext)
        {
            return true;
        }

        public void OnNavigatedFrom(NavigationContext navigationContext)
        {
            
        }

        private Book newBook;
        public Book NewBook
        {
            get
            {
                return newBook;
            }
            set
            {
                SetProperty(ref newBook, value);
            }
        }
    }
}


//D:\C\WpfApp29\WpfApp29\Views\Books.xaml
<UserControl x:Class="WpfApp29.Views.Books"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
             xmlns:local="clr-namespace:WpfApp29.Views"
             mc:Ignorable="d" 
             d:DesignHeight="450" d:DesignWidth="800">
    <Grid>
        <DataGrid ItemsSource="{Binding BooksCollection}"
                      VirtualizingPanel.IsVirtualizing="True"
                      VirtualizingPanel.VirtualizationMode="Recycling"
                      VirtualizingPanel.CacheLength="2,2"
                      VirtualizingPanel.CacheLengthUnit="Item"
                      EnableColumnVirtualization="True"
                      EnableRowVirtualization="True"
                      ScrollViewer.CanContentScroll="True"
                      ScrollViewer.IsDeferredScrollingEnabled="True"
                      SnapsToDevicePixels="True"
                      UseLayoutRounding="True"
                      AutoGenerateColumns="True"
                      CanUserAddRows="False"
                      IsReadOnly="True"
                      SelectionMode="Single"
                      SelectedItem="{Binding SelectedBk,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}">
            <DataGrid.Resources>
                <Style TargetType="DataGridRow">
                    <Setter Property="FontSize" Value="30"/>
                    <Style.Triggers>
                        <Trigger Property="IsMouseOver" Value="True">
                            <Setter Property="FontSize" Value="50"/>
                            <Setter Property="Foreground" Value="Red"/>
                        </Trigger>
                    </Style.Triggers>
                </Style>
            </DataGrid.Resources>
        </DataGrid>
    </Grid>
</UserControl>

//D:\C\WpfApp29\WpfApp29\ViewModels\BooksViewModel.cs
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Dynamic;
using System.Printing;
using System.Text;
using WpfApp29.Models;

namespace WpfApp29.ViewModels
{
    public class BooksViewModel : BindableBase
    {
        private static long idx = 0;
        private static readonly object objLock = new object();
        private static long GetIdx()
        {
            return Interlocked.Increment(ref idx);
        }

        public BooksViewModel()
        {
            InitBooksCollection();
        }

        private void InitBooksCollection()
        {
            BooksCollection = new ObservableCollection<Book>();
            for (int i = 0; i < 100; i++)
            {
                var a = GetIdx();
                BooksCollection.Add(new Book()
                {
                    Id = a,
                    Name = $"Name_{a}",
                    ISBN = $"ISBN_{a}_{Guid.NewGuid():N}"
                });
            }
        }


        private ObservableCollection<Book> booksCollection;
        public ObservableCollection<Book> BooksCollection
        {
            get
            {
                return booksCollection;
            }
            set
            {
                SetProperty(ref booksCollection, value);
            }
        }

        private Book selectedBk;
        public Book SelectedBk
        {
            get
            {
                return selectedBk;
            }
            set
            {
                SetProperty(ref selectedBk, value);
            }
        }
    }
}


//D:\C\WpfApp29\WpfApp29\Views\EditBooks.xaml
<UserControl x:Class="WpfApp29.Views.EditBooks"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
             xmlns:local="clr-namespace:WpfApp29.Views"
             mc:Ignorable="d" 
             d:DesignHeight="450" d:DesignWidth="800">
    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition/>
            <RowDefinition/>
            <RowDefinition/>
            <RowDefinition/>
        </Grid.RowDefinitions>
        <Grid.ColumnDefinitions>
            <ColumnDefinition/>
            <ColumnDefinition/>
        </Grid.ColumnDefinitions>
        <TextBlock Grid.Row="0" Grid.Column="0" Text="Id:"/>
        <TextBlock Grid.Row="0" Grid.Column="1" Text="{Binding SelectedBook.Id,
            Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}"/>
        <TextBlock Grid.Row="1" Grid.Column="0" Text="Name:"/>
        <TextBox Grid.Row="1" Grid.Column="1" Text="{Binding SelectedBook.Name,
            Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}"/>
        <TextBlock Grid.Row="2" Grid.Column="0" Text="ISBN:"/>
        <TextBox Grid.Row="2" Grid.Column="1" Text="{Binding SelectedBook.ISBN,
            Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}"/>
        <Button Grid.Row="3" Grid.Column="0" Content="Cancel"
                Command="{Binding CancelCommand}"/>
        <Button Grid.Row="3" Grid.Column="1" Content="Update"
                Command="{Binding UpdateCommand}"/>
    </Grid>
</UserControl>

//D:\C\WpfApp29\WpfApp29\ViewModels\EditBooksViewModel.cs
using System;
using System.Collections.Generic;
using System.Text;
using System.Windows;
using WpfApp29.Models;

namespace WpfApp29.ViewModels
{
    public class EditBooksViewModel : BindableBase, INavigationAware
    {
        public DelegateCommand CancelCommand { get; set; }
        public DelegateCommand UpdateCommand { get; set; }

        private BooksViewModel booksVM;
        public EditBooksViewModel(BooksViewModel booksVMValue)
        {
            CancelCommand = new DelegateCommand(CancelCommandExecuted);
            UpdateCommand = new DelegateCommand(UpdateCommandExecuted);
            booksVM= booksVMValue;
            SelectedBook = booksVM.SelectedBk;
        }

        private void UpdateCommandExecuted()
        {
            int selectedIdx = booksVM.BooksCollection.IndexOf(SelectedBook);
            if(selectedIdx>=0)
            {
                booksVM.BooksCollection.RemoveAt(selectedIdx);
                booksVM.BooksCollection.Insert(selectedIdx, SelectedBook);
                MessageBox.Show($"{DateTime.Now},update BookId:{SelectedBook.Id} successfully");
            }
        }

        private void CancelCommandExecuted()
        {
            return;
        }

        public void OnNavigatedTo(NavigationContext navigationContext)
        {
            SelectedBook = booksVM.SelectedBk;
        }

        public bool IsNavigationTarget(NavigationContext navigationContext)
        {
            return true;
        }

        public void OnNavigatedFrom(NavigationContext navigationContext)
        {
             
        }

        private Book selectedBook;
        public Book SelectedBook
        {
            get
            {
                return selectedBook;
            }
            set
            {
                SetProperty(ref selectedBook, value);
            }
        }
    }
}

posted @ 2026-05-13 21:31 FredGrit 阅读(14) 评论(0) 收藏举报

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FredGrit

WPF Prism.Core version 9.0.537 implemented navigation register singleton with splash screen, pass global variable via RegisterSingleton method

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