WCF produce message and WPF consume periodically via DispatcherTimer

1.WCF

//D:\C\WcfService8\WcfService8\Web.config
<?xml version="1.0"?>
<configuration>

  <appSettings>
    <add key="aspnet:UseTaskFriendlySynchronizationContext" value="true" />
  </appSettings>
  <system.web>
    <compilation debug="true" targetFramework="4.8" />
    <httpRuntime targetFramework="4.8"/>
  </system.web>
  <system.serviceModel>
      <bindings>
          <webHttpBinding>
              <binding name="WcfService8WebHttpBinding"
                       transferMode="Buffered" 
                       receiveTimeout="00:10:00" 
                       sendTimeout="00:10:00" 
                       closeTimeout="00:10:00" 
                       openTimeout="00:10:00" 
                       maxReceivedMessageSize="2147483647" 
                       maxBufferSize="2147483647" 
                       maxBufferPoolSize="2147483647">
                  <readerQuotas maxStringContentLength="2147483647" 
                                maxNameTableCharCount="2147483647" 
                                maxDepth="2147483647" 
                                maxBytesPerRead="2147483647" 
                                maxArrayLength="2147483647"/>
                  <security mode="None"/>
              </binding>
          </webHttpBinding>
      </bindings>
    <behaviors>
        <endpointBehaviors>
            <behavior name="Wcf8ServiceEndpointBehavior">
                <webHttp/>
            </behavior>          
        </endpointBehaviors>
      <serviceBehaviors>
        <behavior name="WcfService8Behavior">
          <!-- To avoid disclosing metadata information, set the values below to false before deployment -->
          <serviceMetadata httpGetEnabled="true" httpsGetEnabled="true"/>
          <!-- To receive exception details in faults for debugging purposes, set the value below to true.  Set to false before deployment to avoid disclosing exception information -->
          <serviceDebug includeExceptionDetailInFaults="true"/>
        </behavior>
      </serviceBehaviors>
    </behaviors>
    <services>
        <service name="WcfService8.BookService"
                 behaviorConfiguration="WcfService8Behavior">
            <endpoint address=""
                      binding="webHttpBinding"
                      bindingConfiguration="WcfService8WebHttpBinding"
                      behaviorConfiguration="Wcf8ServiceEndpointBehavior"
                      contract="WcfService8.IBookService"/>
        </service>
    </services>  
    <protocolMapping>
        <add binding="basicHttpsBinding" scheme="https" />
    </protocolMapping>    
    <serviceHostingEnvironment aspNetCompatibilityEnabled="true" multipleSiteBindingsEnabled="true" />
  </system.serviceModel>
  <system.webServer>
    <modules runAllManagedModulesForAllRequests="true"/>
    <!--
        To browse web app root directory during debugging, set the value below to true.
        Set to false before deployment to avoid disclosing web app folder information.
      -->
    <directoryBrowse enabled="true"/>
  </system.webServer>

</configuration>


//D:\C\WcfService8\WcfService8\IBookService.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.Serialization;
using System.ServiceModel;
using System.ServiceModel.Web;
using System.Text;

namespace WcfService8
{
    // NOTE: You can use the "Rename" command on the "Refactor" menu to change the interface name "IBookService" in both code and config file together.
    [ServiceContract]
    public interface IBookService
    {
        [OperationContract]
        [WebGet(UriTemplate = "GetBooksList?cnt={cnt}", RequestFormat = WebMessageFormat.Json, ResponseFormat = WebMessageFormat.Json)]
        List<Book> GetBooksList(int cnt);
    }

    [DataContract]
    public class Book
    {
        [DataMember]
        public long Id { get; set; }

        [DataMember]
        public string Name { get; set; }

        [DataMember]
        public string ISBN {  get; set; }

        [DataMember]
        public string Abstract {  get; set; }

        [DataMember]
        public string Author {  get; set; }

        [DataMember]
        public string Comment {  get; set; }

        [DataMember]
        public string Content {  get; set; }

        [DataMember]
        public string Summary {  get; set; }

        [DataMember]
        public string Title {  get; set; }

        [DataMember]
        public string Topic {  get; set; }
    }
}

//D:\C\WcfService8\WcfService8\BookService.svc.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.Serialization;
using System.ServiceModel;
using System.Text;
using System.Threading;

namespace WcfService8
{
    // NOTE: You can use the "Rename" command on the "Refactor" menu to change the class name "BookService" in code, svc and config file together.
    // NOTE: In order to launch WCF Test Client for testing this service, please select BookService.svc or BookService.svc.cs at the Solution Explorer and start debugging.
    public class BookService : IBookService
    {
        private static long id = 0;
        private static long GetIncrementId()
        {
            return Interlocked.Increment(ref id);
        }
        public List<Book> GetBooksList(int cnt)
        {
            List<Book> booksList = new List<Book>();
            for(int i=0;i<cnt;i++)
            {
                var a=GetIncrementId();
                booksList.Add(new Book()
                {
                    Id=a,
                    Name=$"Name_{a}",
                    ISBN=$"ISBN_{a}_{Guid.NewGuid():N}",
                    Abstract=$"Abstract_{a}",
                    Author=$"Author_{a}",
                    Comment=$"Comment_{a}",
                    Content=$"Content_{a}",
                    Summary=$"Summary_{a}",
                    Title=$"Title_{a}",
                    Topic=$"Topic_{a}"
                });
            }
            return booksList;
        }
    }
}

 

 

2.WPF

//D:\C\WpfApp35\WpfApp35\MainWindow.xaml
<Window x:Class="WpfApp35.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:WpfApp35"
        mc:Ignorable="d"
        Title="{Binding MainTitle}" WindowState="Maximized">
    <Window.DataContext>
        <local:MainVM/>
    </Window.DataContext>
    <Grid>
        <DataGrid ItemsSource="{Binding BooksCollection,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}"
                  AutoGenerateColumns="True"
                  CanUserAddRows="False"
                  VirtualizingPanel.IsVirtualizing="True"
                  VirtualizingPanel.VirtualizationMode="Recycling"
                  VirtualizingPanel.CacheLengthUnit="Item"
                  VirtualizingPanel.CacheLength="5,5"
                  ScrollViewer.IsDeferredScrollingEnabled="True"
                  ScrollViewer.CanContentScroll="True"
                  EnableRowVirtualization="True"
                  EnableColumnVirtualization="True"
                  UseLayoutRounding="True"
                  SnapsToDevicePixels="True">
            <DataGrid.Resources>
                <Style TargetType="DataGridRow">
                    <Setter Property="FontSize" Value="30"/>
                    <Style.Triggers>
                        <Trigger Property="IsMouseOver" Value="True">
                            <Setter Property="FontSize" Value="40"/>
                            <Setter Property="Foreground" Value="Red"/>
                        </Trigger>
                    </Style.Triggers>
                </Style>
            </DataGrid.Resources>
        </DataGrid>
    </Grid>
</Window>


//D:\C\WpfApp35\WpfApp35\MainWindow.xaml.cs
using Newtonsoft.Json;
using System.Collections.ObjectModel;
using System.ComponentModel;
using System.Net.Http;
using System.Runtime.CompilerServices;
using System.Runtime.Serialization;
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 System.Windows.Threading;

namespace WpfApp35
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
        }
    }

    public class MainVM : INotifyPropertyChanged
    {
        private string requestUrl = "http://localhost:51374/BookService.svc/getbookslist?cnt=";
        private HttpClient client;
        private DispatcherTimer tmr;
        public MainVM()
        {
            if (!DesignerProperties.GetIsInDesignMode(new DependencyObject()))
            {
                client = new HttpClient();
                Task.Run(async () =>
                {
                    await InitBooksCollectionAsync(1000000);
                });
                InitTmr();
            }
        }

        private void InitTmr()
        {
            tmr = new DispatcherTimer();
            tmr.Interval = TimeSpan.FromSeconds(60);
            tmr.Tick += async (s, e) =>
            {
                await InitBooksCollectionAsync();
            };
            tmr.Start();
        }

        private async Task InitBooksCollectionAsync(int cnt=1000000)
        {
            MainTitle = $"{DateTime.Now},loading from {requestUrl}{cnt}";
            string jsonStr = await client.GetStringAsync($"{requestUrl}{cnt}");
            var bksList = JsonConvert.DeserializeObject<List<Book>>(jsonStr);
            if (bksList != null && bksList.Any())
            {
                BooksCollection = new ObservableCollection<Book>(bksList);
                MainTitle = $"{DateTime.Now},loaded {BooksCollection.Count} books,FirstId:{BooksCollection.FirstOrDefault()?.Id},Last Id:{BooksCollection.LastOrDefault()?.Id}";
            }
        }

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

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

        public event PropertyChangedEventHandler? PropertyChanged;
        private void OnPropertyChanged([CallerMemberName] string propName = "")
        {
            var handler = PropertyChanged;
            handler?.Invoke(this, new PropertyChangedEventArgs(propName));
        }
    }

    [DataContract]
    public class Book
    {
        [DataMember]
        public long Id { get; set; }

        [DataMember]
        public string Name { get; set; }

        [DataMember]
        public string ISBN { get; set; }

        [DataMember]
        public string Abstract { get; set; }

        [DataMember]
        public string Author { get; set; }

        [DataMember]
        public string Comment { get; set; }

        [DataMember]
        public string Content { get; set; }

        [DataMember]
        public string Summary { get; set; }

        [DataMember]
        public string Title { get; set; }

        [DataMember]
        public string Topic { get; set; }
    }
}