WPF Prism.Wpf RegionManager

Install-Package Prism.Wpf;
Install-Package Prism.DryIOC;

 

<Window x:Class="WpfApp28.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:prism="http://prismlibrary.com/"xmlns:local="clr-namespace:WpfApp28.Views"WindowState="Maximized"mc:Ignorable="d"Title="MainWin" Height="450" Width="800"prism:ViewModelLocator.AutoWireViewModel="True" ><Grid><Grid.RowDefinitions><RowDefinition Height="Auto"/><RowDefinition/></Grid.RowDefinitions><Grid.ColumnDefinitions><ColumnDefinition/><ColumnDefinition/></Grid.ColumnDefinitions><TextBlock Text="{Binding MainStatus}" Grid.Row="0" Grid.Column="0" Grid.ColumnSpan="2"FontSize="30"/><ContentControl Grid.Row="1" Grid.Column="0"prism:RegionManager.RegionName="DgRegion"/><ContentControl Grid.Row="1" Grid.Column="1"prism:RegionManager.RegionName="ImageRegion"/></Grid>
</Window>using System.Configuration;
using System.Data;
using System.Windows;
using WpfApp28.Services;
using WpfApp28.ViewModels;
using WpfApp28.Views;namespace WpfApp28
{/// <summary>/// Interaction logic for App.xaml/// </summary>public partial class App : PrismApplication{protected override Window CreateShell(){return Container.Resolve<MainWin>();}protected override void RegisterTypes(IContainerRegistry containerRegistry){containerRegistry.Register<IIDService, IDService>();containerRegistry.Register<INameService, NameService>();containerRegistry.Register<IISBNService,ISBNService>();containerRegistry.RegisterForNavigation<DgView, DgViewModel>("DgView");containerRegistry.RegisterForNavigation<ImageView, ImageViewModel>("ImgView");}protected override void OnInitialized(){base.OnInitialized();//var mainWin=Container.Resolve<MainWin>();//mainWin?.Show();var regionManager = Container.Resolve<IRegionManager>();regionManager.RequestNavigate("DgRegion", "DgView");regionManager.RequestNavigate("ImageRegion", "ImgView");}}}

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

//MainWin.xaml
<Window x:Class="WpfApp28.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:prism="http://prismlibrary.com/"xmlns:local="clr-namespace:WpfApp28.Views"WindowState="Maximized"mc:Ignorable="d"Title="MainWin" Height="450" Width="800"prism:ViewModelLocator.AutoWireViewModel="True" ><Grid><Grid.RowDefinitions><RowDefinition Height="Auto"/><RowDefinition/></Grid.RowDefinitions><Grid.ColumnDefinitions><ColumnDefinition/><ColumnDefinition/></Grid.ColumnDefinitions><TextBlock Text="{Binding MainStatus}" Grid.Row="0" Grid.Column="0" Grid.ColumnSpan="2"FontSize="30"/><ContentControl Grid.Row="1" Grid.Column="0"prism:RegionManager.RegionName="DgRegion"/><ContentControl Grid.Row="1" Grid.Column="1"prism:RegionManager.RegionName="ImageRegion"/></Grid>
</Window>
//MainWinViewModel.cs
using System;
using System.Collections.Generic;
using System.Text;namespace WpfApp28.ViewModels
{public class MainWinViewModel:BindableBase{UInt128 idx = 0;public MainWinViewModel(){MainStatus = $"{++idx}_{Guid.NewGuid():N}_" +$"{DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss.fff")}";Task.Run(() =>{InitTimer();});}private void InitTimer(){System.Timers.Timer tmr=new System.Timers.Timer();tmr.Interval = 1000;tmr.Elapsed += Tmr_Elapsed;tmr.Start();}private void Tmr_Elapsed(object? sender, System.Timers.ElapsedEventArgs e){MainStatus = $"{++idx}_{Guid.NewGuid():N}_" +$"{DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss.fff")}";}private string mainStatus;public string MainStatus{get{return mainStatus; }set{SetProperty(ref mainStatus, value);}}}
}//App.xaml
<prism:PrismApplication x:Class="WpfApp28.App"xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"xmlns:local="clr-namespace:WpfApp28"xmlns:prism="http://prismlibrary.com/">
</prism:PrismApplication>//App.xaml.cs
using System.Configuration;
using System.Data;
using System.Windows;
using WpfApp28.Services;
using WpfApp28.ViewModels;
using WpfApp28.Views;namespace WpfApp28
{/// <summary>/// Interaction logic for App.xaml/// </summary>public partial class App : PrismApplication{protected override Window CreateShell(){return Container.Resolve<MainWin>();}protected override void RegisterTypes(IContainerRegistry containerRegistry){containerRegistry.Register<IIDService, IDService>();containerRegistry.Register<INameService, NameService>();containerRegistry.Register<IISBNService,ISBNService>();containerRegistry.RegisterForNavigation<DgView, DgViewModel>("DgView");containerRegistry.RegisterForNavigation<ImageView, ImageViewModel>("ImgView");}protected override void OnInitialized(){base.OnInitialized();//var mainWin=Container.Resolve<MainWin>();//mainWin?.Show();var regionManager = Container.Resolve<IRegionManager>();regionManager.RequestNavigate("DgRegion", "DgView");regionManager.RequestNavigate("ImageRegion", "ImgView");}}}//DgView.xaml
<UserControl x:Class="WpfApp28.Views.DgView"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:prism="http://prismlibrary.com/"VerticalAlignment="Stretch"HorizontalAlignment="Stretch"prism:ViewModelLocator.AutoWireViewModel="True"xmlns:local="clr-namespace:WpfApp28.Views"mc:Ignorable="d" d:DesignHeight="450" d:DesignWidth="800"><Grid><DataGrid ItemsSource="{Binding BooksCollection,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}"VirtualizingPanel.IsVirtualizing="True"VirtualizingPanel.VirtualizationMode="Recycling"VirtualizingPanel.CacheLengthUnit="Item"VirtualizingPanel.CacheLength="2,2"ScrollViewer.IsDeferredScrollingEnabled="True"ScrollViewer.CanContentScroll="True"AutoGenerateColumns="True"FontSize="20"CanUserAddRows="False"></DataGrid></Grid>
</UserControl>//DgView.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.Navigation;
using System.Windows.Shapes;
using WpfApp28.ViewModels;namespace WpfApp28.Views
{/// <summary>/// Interaction logic for DgView.xaml/// </summary>public partial class DgView : UserControl{public DgView(){InitializeComponent();this.Loaded += async (s, e) =>{var vm = this.DataContext as DgViewModel;if (vm != null){await vm.InitBooksCollection();}};}}
}//DgViewModel.cs
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Configuration;
using System.Text;
using WpfApp28.Models;
using WpfApp28.Services;namespace WpfApp28.ViewModels
{public class DgViewModel:BindableBase{IIDService idService;INameService nameService;IISBNService isbnService;public DgViewModel(IIDService idServiceValue,INameService nameServiceValue,IISBNService isbnServiceValue){idService = idServiceValue;nameService = nameServiceValue;isbnService = isbnServiceValue;}public async Task InitBooksCollection(){BooksCollection = new ObservableCollection<Book>();List<Book> booksList= new List<Book>();for(int i=1;i<1000001;i++){booksList.Add(new Book(){Id = idService.GetID(),Name = nameService.GetName(),ISBN = isbnService.GetISBN(),Title = $"Title_{i}",Topic = $"Topic_{i}"});if (i % 10000 == 0){await PopulateBooksCollectionAsync(booksList);}}if(booksList.Any()){await PopulateBooksCollectionAsync(booksList);}}private async Task PopulateBooksCollectionAsync(List<Book> booksList){var tempList = booksList.ToList();booksList.Clear();await System.Windows.Application.Current.Dispatcher.InvokeAsync(async () =>{foreach (var bk in tempList){BooksCollection.Add(bk);}}, System.Windows.Threading.DispatcherPriority.Background);}private ObservableCollection<Book> booksCollection;public ObservableCollection<Book> BooksCollection{get{return booksCollection; }set{SetProperty(ref booksCollection, value);}}}
}//ImageView.xaml
<UserControl x:Class="WpfApp28.Views.ImageView"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:prism="http://prismlibrary.com/"prism:ViewModelLocator.AutoWireViewModel="True"VerticalAlignment="Stretch"HorizontalAlignment="Stretch"xmlns:local="clr-namespace:WpfApp28.Views"mc:Ignorable="d" d:DesignHeight="450" d:DesignWidth="800"><Grid><Grid.Background><ImageBrush ImageSource="{Binding ImgSource}" Stretch="Uniform"/></Grid.Background><TextBlock Text="{Binding ImgUrl}"HorizontalAlignment="Stretch"VerticalAlignment="Center"Foreground="Red"FontSize="50"TextWrapping="Wrap"/></Grid>
</UserControl>//ImageViewModel.cs
using System;
using System.Collections.Generic;
using System.IO;
using System.Text;
using System.Windows.Media;
using System.Windows.Media.Imaging;namespace WpfApp28.ViewModels
{public class ImageViewModel : BindableBase{List<string> imgsList = new List<string>();int imgsCount = 0;int imgIdx = 0;public ImageViewModel(){InitImgs();Task.Run(() =>{InitTimer();});}private void InitTimer(){System.Timers.Timer tmr=new System.Timers.Timer();tmr.Interval = 1000;tmr.Elapsed += Tmr_Elapsed;tmr.Start();}private void Tmr_Elapsed(object? sender, System.Timers.ElapsedEventArgs e){System.Windows.Application.Current.Dispatcher.Invoke(new Action(() =>{ImgUrl = System.IO.Path.GetFullPath(imgsList[(++imgIdx) % imgsCount]);ImgSource = GenImageSourceViaUrl(ImgUrl);}));            }private void InitImgs(){string imgDir = @"../../../Images";if (!Directory.Exists(imgDir)){return;}imgsList = Directory.GetFiles(imgDir).ToList();if (imgsList == null || !imgsList.Any()){return;}imgsCount = imgsList.Count;ImgUrl = System.IO.Path.GetFullPath(imgsList[0]);ImgSource = GenImageSourceViaUrl(ImgUrl);            }private ImageSource GenImageSourceViaUrl(string imgUrl){BitmapImage bmi = new BitmapImage();if(!File.Exists(imgUrl)){return bmi; }bmi.BeginInit();bmi.UriSource=new Uri(imgUrl,UriKind.RelativeOrAbsolute);bmi.EndInit();if(bmi.CanFreeze){bmi.Freeze();}return bmi;}private ImageSource imgSource;public ImageSource ImgSource{get{return imgSource;}set{SetProperty(ref imgSource, value);}}private string imgUrl;public string ImgUrl{get{return imgUrl;}set{SetProperty(ref imgUrl, value);}}}
}//Service.cs
using System;
using System.Collections.Generic;
using System.Text;namespace WpfApp28.Services
{public interface IIDService{int GetID();}public class IDService : IIDService{int idx = 0;public int GetID(){return Interlocked.Increment(ref idx);}}public interface INameService{string GetName();}public class NameService : INameService{int idx = 0;public string GetName(){return $"Name_{Interlocked.Increment(ref idx)}";}}public interface IISBNService{string GetISBN();}public class ISBNService:IISBNService{int idx = 0;public string GetISBN(){return $"ISBN_{Interlocked.Increment(ref idx)}_{Guid.NewGuid():N}";}}
}//Book.cs
using System;
using System.Collections.Generic;
using System.Text;namespace WpfApp28.Models
{public class Book{public int Id { get; set; }public string Name { get; set; }public string ISBN { get; set;  }public string Title { get;set;  }public string Topic { get; set;  }}
}