WPF LIstView

Install-Package Newtonsoft.json

　　

<Window x:Class="WpfApp19.MainWindow"
        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:WpfApp19"
        mc:Ignorable="d"
        Title="{Binding MainTitle}" WindowState="Maximized">
    <Window.DataContext>
        <local:MainVM/>
    </Window.DataContext>
    <Grid>
        <ListView ItemsSource="{Binding BksCollection}"
                  VirtualizingPanel.IsVirtualizing="True"
                  VirtualizingPanel.VirtualizationMode="Recycling"
                  VirtualizingPanel.CacheLengthUnit="Item"
                  VirtualizingPanel.CacheLength="5,5"
                  ScrollViewer.CanContentScroll="True"
                  ScrollViewer.IsDeferredScrollingEnabled="True"
                  UseLayoutRounding="True"
                  BorderBrush="Cyan"
                  BorderThickness="2"
                  Margin="5,0"
                  >
            <ListView.ItemTemplate>
                <DataTemplate DataType="{x:Type local:Book}">
                    <Grid Margin="5" HorizontalAlignment="Stretch">
                        <Grid.Resources>
                            <Style TargetType="TextBlock">
                                <Setter Property="FontSize" Value="20"/>
                                <Setter Property="HorizontalAlignment" Value="Center"/>
                                <Style.Triggers>
                                    <Trigger Property="IsMouseOver" Value="True">
                                        <Setter Property="FontWeight" Value="ExtraBold"/>
                                        <Setter Property="Foreground" Value="Red"/>
                                    </Trigger>
                                </Style.Triggers>
                            </Style>
                        </Grid.Resources>
                        <Grid.RowDefinitions>
                            <RowDefinition/>
                            <RowDefinition/>
                            <RowDefinition/>
                        </Grid.RowDefinitions>
                        <Grid.ColumnDefinitions>
                            <ColumnDefinition/>
                            <ColumnDefinition/>
                            <ColumnDefinition/>
                            <ColumnDefinition/>
                        </Grid.ColumnDefinitions>
                        <TextBlock Grid.Row="0" Grid.Column="0" Text="{Binding Id}"/>
                        <TextBlock Grid.Row="0" Grid.Column="1" Text="{Binding Name}"/>
                        <TextBlock Grid.Row="0" Grid.Column="2" Text="{Binding Author}"/>
                        <TextBlock Grid.Row="0" Grid.Column="3" Text="{Binding Comment}"/>
                        <TextBlock Grid.Row="1" Grid.Column="0" Text="{Binding Content}"/>
                        <TextBlock Grid.Row="1" Grid.Column="1" Text="{Binding Summary}"/>
                        <TextBlock Grid.Row="1" Grid.Column="2" Text="{Binding CategoryName}"/>
                        <TextBlock Grid.Row="1" Grid.Column="3" Text="{Binding Title}"/>
                        <TextBlock Grid.Row="2" Grid.Column="0" Text="{Binding Topic}"/>
                        <TextBlock Grid.Row="2" Grid.Column="1" Grid.ColumnSpan="3" Text="{Binding ISBN}"/>
                    </Grid>
                </DataTemplate>
            </ListView.ItemTemplate>
            <ListView.Template>
                <ControlTemplate>
                    <ScrollViewer CanContentScroll="True">
                        <ItemsPresenter HorizontalAlignment="Stretch"/>
                    </ScrollViewer>
                </ControlTemplate>
            </ListView.Template>
        </ListView>
    </Grid>
</Window>


using Newtonsoft.Json;
using System.Collections.ObjectModel;
using System.ComponentModel;
using System.Net.Http;
using System.Runtime.CompilerServices;
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;

namespace WpfApp19
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
        }
    }


    public class MainVM : INotifyPropertyChanged
    {
        static string url = "http://172.16.107.152:5000/getbooks/1000000";
        static HttpClient client = new HttpClient()
        {
            Timeout = TimeSpan.FromMinutes(1)
        };

        static bool isLoading = false;

        public MainVM()
        {
            if(!DesignerProperties.GetIsInDesignMode(new DependencyObject()))
            {
                _ = LoadDataAsync();
            }
        }

        private async Task AutoLoadDataAsync()
        {
            while(true)
            {
                await LoadDataAsync();
                await Task.Delay(1000);
            }
        }

        private async Task LoadDataAsync()
        {
            if(isLoading)
            {
                return;
            }
            isLoading = true;
            MainTitle = $"{DateTime.Now},loading...";
            try
            {
                var jsonStr = await client.GetStringAsync(url);
                if(!string.IsNullOrWhiteSpace(jsonStr))
                {
                    var bks=JsonConvert.DeserializeObject<List<Book>>(jsonStr);
                    if(bks!=null && bks.Any())
                    {
                        BksCollection = new ObservableCollection<Book>(bks);
                        MainTitle = $"{DateTime.Now},loading {BksCollection.Count} items," +
                            $"FirstId:{BksCollection.FirstOrDefault()?.Id}," +
                            $"LastId:{BksCollection.LastOrDefault()?.Id}";
                    }
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex?.Message);
            }
            finally
            {
                isLoading = false;
            }
        }

        private string mainTitle = $"{DateTime.Now}";
        public string MainTitle
        {
            get
            {
                return mainTitle;
            }
            set
            {
                if(value!=mainTitle)
                {
                    mainTitle = value;
                    OnPropertyChanged();
                }
            }
        }

        private ObservableCollection<Book> bksCollection;
        public ObservableCollection<Book> BksCollection
        {
            get
            {
                return bksCollection;
            }
            set
            {
                if (value != bksCollection)
                {
                    bksCollection = value;
                    OnPropertyChanged();
                }
            }
        }


        public event PropertyChangedEventHandler? PropertyChanged;
        private void OnPropertyChanged([CallerMemberName] string propName="")
        {
            var handler=Volatile.Read(ref this.PropertyChanged);
            if (handler != null)
            {
                handler(this, new PropertyChangedEventArgs(propName));
            }
        }
    }


    public class Book
    {
        public long Id { get; set; }
        public string Name { get; set; }
        public string ISBN { get; set; }
        public string Author { get; set; }
        public string Comment { get; set; }
        public string Content { get; set; }
        public string CategoryName { get; set; }
        public string Summary { get; set; }
        public string Title { get; set; }
        public string Topic { get; set; }
    }
}