WPF DataGrid DataGridTemplateColumn DataTemplate call pre...

博客园 - FredGrit

WPF customize via three combied custom controls WPF DataGrid DataGridTemplateColumn DataTemplate ContentPresenter ContentTemplate WPF Customcontrol NumUpDownScroller WPF CustomControl override Template in Generic.xaml and invoke different style WPF HierarchicalDataTemplate customize via ToggleButton WPF ListBox load data via contentcontrol an ItemTemplate WPF DataGrid load data from Asp.Net Core WebAPI WPF TreeView HierarchicalDataTemplate with grouped Data WPF display grouped data with GroupBox and ItemsControl WPF two listbox scroll syncchronously via behavior WPF invoke data from WebAPI，DataGridTemplate call pre defined DataTemplate via ContentPresenter WPF ListBox load data from WCF WPF datagrid load data from WCF via json, export selected items to json file WPF ItemsControl load data from WCF,DataTemplate, ContentControl WPF customize rotated wheel relentlessly via custom control WPF embed DataTemplate in HierchicalDataTemplate of TreeView WPF ContentControl, ItemsControl, ItemsPanelTemplate,VirtualizingStackPanel,convert xml string to List<T> WPF parse web.config recursively, TreeView and HierarchicalDataTemplate WPF Custom control in cs and Generic.xaml WPF ContextMenu independent visual tree resolved via Freezable implemented class WPF custom control GetTemplateChild vs FindName,NameScope separation between Logical Tree and Visual Tree, WPF ListBox ListView Datatemplate, parse xml to List via XmlSerializer and StringReader WPF TreeView HierarchicalDataTemplate, parse xml via traverse in XmlElement WPF parse xml via [XmRoot] and [XmlElement] attributes together, contentcontrol's template is ControlTemplate from Resources WPF ContentControl invoke Template from resource, reuse datatemplate WPF deserialize xml string as List via [XmlRoot] and [XmlElement] attribute WPF ContentControl Template WPF DatagridTemplate Binding DataTemplate WPF TreeView explicitly given key name to HierarchicalDataTemplate WPF, parse XMlDocument as List

FredGrit · 2026-09-05 · via 博客园 - FredGrit

 <DataGrid.Columns>
     <DataGridTemplateColumn>
         <DataGridTemplateColumn.CellTemplate>
             <DataTemplate>
                 <ContentPresenter ContentTemplate="{StaticResource BookDataTemplate}"/>
             </DataTemplate>
         </DataGridTemplateColumn.CellTemplate>
     </DataGridTemplateColumn>
 </DataGrid.Columns>

Install-Package Newtonsoft.Json

//D:\C\WpfApp7\MainWindow.xaml
<Window x:Class="WpfApp7.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:WpfApp7"
        mc:Ignorable="d"
        Title="{Binding MainTitle}" WindowState="Maximized">
    <Window.DataContext>
        <local:MainVM/>
    </Window.DataContext>
    <Window.Resources>
        
        <Style TargetType="TextBlock" x:Key="TbkStyle">
            <Setter Property="FontSize" Value="30"/>
            <Style.Triggers>
                <Trigger Property="IsMouseOver" Value="True">
                    <Setter Property="Foreground" Value="Red"/>
                    <Setter Property="FontWeight" Value="ExtraBold"/>
                </Trigger>
            </Style.Triggers>
        </Style>
        
        <DataTemplate DataType="{x:Type local:Book}"
                      x:Key="BookDataTemplate">
            <Grid Margin="10"
                  Width="{x:Static SystemParameters.PrimaryScreenWidth}">
                <Grid.Resources>
                    <Style TargetType="TextBlock" BasedOn="{StaticResource TbkStyle}"/>
                </Grid.Resources>
                <Grid.RowDefinitions>
                    <RowDefinition/>
                    <RowDefinition/>
                    <RowDefinition/>
                </Grid.RowDefinitions>
                <Grid.ColumnDefinitions>
                    <ColumnDefinition MaxWidth="300"/>
                    <ColumnDefinition MaxWidth="300"/>
                    <ColumnDefinition Width="*"/>
                </Grid.ColumnDefinitions>
                <TextBlock Text="{Binding Id}" Grid.Row="0" Grid.Column="0"/>
                <TextBlock Text="{Binding Name}" Grid.Row="0" Grid.Column="1"/>
                <TextBlock Text="{Binding ISBN}" Grid.Row="0" Grid.Column="2"/>
                <TextBlock Text="{Binding Author}" Grid.Row="1" Grid.Column="0"/>
                <TextBlock Text="{Binding Comment}" Grid.Row="1" Grid.Column="1"/>
                <TextBlock Text="{Binding Content}" Grid.Row="1" Grid.Column="2"/>
                <TextBlock Text="{Binding Summary}" Grid.Row="2" Grid.Column="0"/>
                <TextBlock Text="{Binding Title}" Grid.Row="2" Grid.Column="1"/>
                <TextBlock Text="{Binding Topic}" Grid.Row="2" Grid.Column="2"/>
            </Grid>
        </DataTemplate>

        <ControlTemplate TargetType="ContentControl"
                         x:Key="DGTemplate">
            <DataGrid ItemsSource="{Binding BksCollection}"
                      VirtualizingPanel.IsVirtualizing="True"
                      VirtualizingPanel.VirtualizationMode="Recycling"
                      VirtualizingPanel.CacheLength="5,5"
                      VirtualizingPanel.CacheLengthUnit="Item"
                      ScrollViewer.CanContentScroll="True"
                      ScrollViewer.IsDeferredScrollingEnabled="True"
                      AutoGenerateColumns="False"
                      CanUserAddRows="False"
                      SnapsToDevicePixels="True"
                      UseLayoutRounding="True">
                <DataGrid.Columns>
                    <DataGridTemplateColumn>
                        <DataGridTemplateColumn.CellTemplate>
                            <DataTemplate>
                                <ContentPresenter ContentTemplate="{StaticResource BookDataTemplate}"/>
                            </DataTemplate>
                        </DataGridTemplateColumn.CellTemplate>
                    </DataGridTemplateColumn>
                </DataGrid.Columns>
            </DataGrid>
        </ControlTemplate>
    </Window.Resources>
    
    <Grid>
        <ContentControl Template="{StaticResource DGTemplate}"/>
    </Grid>
</Window>


//D:\C\WpfApp7\MainWindow.xaml.cs
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 WpfApp7
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
        }
    }

    public class MainVM : INotifyPropertyChanged
    {
        private static string url = "https://localhost:5001/api/books/getbooks/";
        private static HttpClient client = new HttpClient()
        {
            Timeout = TimeSpan.FromHours(1)
        };

        private bool isLoading = false;
        public MainVM()
        {
            if(!DesignerProperties.GetIsInDesignMode(new DependencyObject()))
            {
                _ = AutoLoadDataAsync();
            }
        }

        private async Task AutoLoadDataAsync(int cnt=1000000)
        {
            while(true)
            {
                await InitBksAsync();
                await Task.Delay(5000);
            }
        }

        private async Task InitBksAsync(int cnt=1000000)
        {
            if(isLoading)
            {
                return;
            }
            isLoading = false;

            MainTitle = $"{DateTime.Now},loading...";
            PrintMsg(MainTitle);

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

        private void PrintMsg(string msg)
        {
#if DEBUG
            System.Diagnostics.Debug.WriteLine(msg);
#else
            System.Diagnostics.Trace.WriteLine(msg);
#endif
        }

        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 PropertyChanged);
            if(handler==null)
            {
                return;
            }
            handler(this, new PropertyChangedEventArgs(propName));
        }
    }


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

//Asp.Net WebAPI plays as data provider and Kestrel as service host.

//D:\C\WebApplication3\Models\Book.cs
namespace WebApplication3.Models
{
    public class Book
    {
        public long Id { get; set; }
        public string Name { get; set; }
        public string Author { get; set; }
        public string CategoryName { get; set; }
        public string ISBN { get; set; }
        public string Comment { get; set; }
        public string Content { get; set; }
        public string Summary { get; set; }
        public string Title { get; set; }
        public string Topic { get; set; }
    }

    enum BookCategory
    {
        Science, Technology, Engineering, Math
    }
}


//D:\C\WebApplication3\Controllers\BooksController.cs
using Microsoft.AspNetCore.Mvc;
using WebApplication3.Models;

// For more information on enabling Web API for empty projects, visit https://go.microsoft.com/fwlink/?LinkID=397860

namespace WebApplication3.Controllers
{
    [Route("api/[controller]")]
    [ApiController]
    public class BooksController : ControllerBase
    {
        private static long id = 1;
        private static string[] enumNames = Enum.GetNames(typeof(BookCategory));
        private static int enumsLen=enumNames.Length;

        private static(long,long) GetStartEnd(int cnt=1000000)
        {
            long end=Interlocked.Add(ref id, cnt);
            long start = end - cnt;
            return (start, end);
        }

        [HttpGet("getbooks/{cnt}")]
        public List<Book> GetBooks(int cnt=1000000)
        {
            List<Book> bksList=new List<Book>();
            var(start,end) = GetStartEnd(cnt);  
            for(long i=start;i<end;i++)
            {
                bksList.Add(new Book()
                {
                    Id=i,
                    Name=$"Name_{i}",
                    CategoryName = $"{enumNames[i%enumsLen]}",
                    Author=$"Author_{i}",
                    Comment=$"Comment_{i}",
                    Content=$"Content_{i}",
                    Summary=$"Summary_{i}",
                    ISBN=$"ISBN_{i}_{Guid.NewGuid():N}",
                    Title=$"Title_{i}",
                    Topic=$"Topic_{i}"
                });
            }
            Console.WriteLine($"{DateTime.Now},Length:{cnt}," +
                $"First Id:{bksList.FirstOrDefault()?.Id}," +
                $"Last Id:{bksList.LastOrDefault()?.Id}");
            return bksList;
        }
    }
}


//D:\C\WebApplication3\Program.cs

namespace WebApplication3
{
    public class Program
    {
        public static void Main(string[] args)
        {
            var builder = WebApplication.CreateBuilder(args);

            builder.WebHost.UseKestrel(options =>
            {
                options.ListenLocalhost(5000);
                options.ListenLocalhost(5001, x =>
                {
                    x.UseHttps();
                });
            });
            // Add services to the container.

            builder.Services.AddControllers();
            // Learn more about configuring OpenAPI at https://aka.ms/aspnet/openapi
            builder.Services.AddOpenApi();

            var app = builder.Build();

            // Configure the HTTP request pipeline.
            if (app.Environment.IsDevelopment())
            {
                app.MapOpenApi();
            }

            //app.UseHttpsRedirection();

            app.UseAuthorization();


            app.MapControllers();

            app.Run();
        }
    }
}

info: Microsoft.Hosting.Lifetime[14]
      Now listening on: http://localhost:5000
info: Microsoft.Hosting.Lifetime[14]
      Now listening on: https://localhost:5001
info: Microsoft.Hosting.Lifetime[0]
      Application started. Press Ctrl+C to shut down.
info: Microsoft.Hosting.Lifetime[0]
      Hosting environment: Production
info: Microsoft.Hosting.Lifetime[0]
      Content root path: D:\C\WebApplication3\bin\Release\net10.0
2026-09-05 17:27:03,Length:1000000,First Id:1,Last Id:1000000
2026-09-05 17:27:34,Length:1000000,First Id:1000001,Last Id:2000000
2026-09-05 17:28:07,Length:1000000,First Id:2000001,Last Id:3000000
2026-09-05 17:29:34,Length:1000000,First Id:3000001,Last Id:4000000
2026-09-05 17:29:44,Length:1000000,First Id:4000001,Last Id:5000000
2026-09-05 17:29:53,Length:1000000,First Id:5000001,Last Id:6000000
2026-09-05 17:30:03,Length:1000000,First Id:6000001,Last Id:7000000
2026-09-05 17:30:12,Length:1000000,First Id:7000001,Last Id:8000000
2026-09-05 17:30:23,Length:1000000,First Id:8000001,Last Id:9000000
2026-09-05 17:30:36,Length:1000000,First Id:9000001,Last Id:10000000
2026-09-05 17:30:49,Length:1000000,First Id:10000001,Last Id:11000000
2026-09-05 17:31:03,Length:1000000,First Id:11000001,Last Id:12000000
2026-09-05 17:31:16,Length:1000000,First Id:12000001,Last Id:13000000
2026-09-05 17:31:30,Length:1000000,First Id:13000001,Last Id:14000000
2026-09-05 17:31:43,Length:1000000,First Id:14000001,Last Id:15000000
2026-09-05 17:31:57,Length:1000000,First Id:15000001,Last Id:16000000
2026-09-05 17:32:11,Length:1000000,First Id:16000001,Last Id:17000000
2026-09-05 17:32:23,Length:1000000,First Id:17000001,Last Id:18000000
2026-09-05 17:32:37,Length:1000000,First Id:18000001,Last Id:19000000
2026-09-05 17:32:50,Length:1000000,First Id:19000001,Last Id:20000000
2026-09-05 17:33:05,Length:1000000,First Id:20000001,Last Id:21000000
2026-09-05 17:33:17,Length:1000000,First Id:21000001,Last Id:22000000
2026-09-05 17:33:32,Length:1000000,First Id:22000001,Last Id:23000000
2026-09-05 17:33:45,Length:1000000,First Id:23000001,Last Id:24000000
2026-09-05 17:33:59,Length:1000000,First Id:24000001,Last Id:25000000
2026-09-05 17:34:12,Length:1000000,First Id:25000001,Last Id:26000000
2026-09-05 17:34:26,Length:1000000,First Id:26000001,Last Id:27000000
2026-09-05 17:34:40,Length:1000000,First Id:27000001,Last Id:28000000
2026-09-05 17:34:49,Length:1000000,First Id:28000001,Last Id:29000000
2026-09-05 17:35:03,Length:1000000,First Id:29000001,Last Id:30000000
2026-09-05 17:35:13,Length:1000000,First Id:30000001,Last Id:31000000

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博客园 - FredGrit