DataGridTemplate.CellTemplate contains one datatemplae will display the customoized control,the key located at the custom control's dependency property binding and relative source of x:type datagridrow
<local:ImageTextblock ImgUrl="{Binding DataContext.ImageUrl,RelativeSource={RelativeSource Mode=FindAncestor,AncestorType={x:Type DataGridRow}}}" Width="200" Height="500" TbkStr="{Binding DataContext.Name,RelativeSource={RelativeSource Mode=FindAncestor,AncestorType={x:Type DataGridRow}}}"/>
//customize user control <UserControl x:Class="WpfApp364.ImageTextblock" 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:WpfApp364" mc:Ignorable="d" d:DesignHeight="450" d:DesignWidth="800"> <Grid> <Image Source="{Binding ImgUrl}" Width="200" Height="500" HorizontalAlignment="Stretch" VerticalAlignment="Stretch"/> <TextBlock Text="{Binding TbkStr}" HorizontalAlignment="Center" VerticalAlignment="Center" FontSize="30" /> </Grid> </UserControl> using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; 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 WpfApp364 { /// <summary> /// Interaction logic for ImageTextblock.xaml /// </summary> public partial class ImageTextblock : UserControl { public ImageTextblock() { InitializeComponent(); this.DataContext = this; } public string ImgUrl { get { return (string)GetValue(ImgUrlProperty); } set { SetValue(ImgUrlProperty, value); } } // Using a DependencyProperty as the backing store for ImgUrl. This enables animation, styling, binding, etc... public static readonly DependencyProperty ImgUrlProperty = DependencyProperty.Register("ImgUrl", typeof(string), typeof(ImageTextblock), new PropertyMetadata(null)); public string TbkStr { get { return (string)GetValue(TbkStrProperty); } set { SetValue(TbkStrProperty, value); } } // Using a DependencyProperty as the backing store for TbkStr. This enables animation, styling, binding, etc... public static readonly DependencyProperty TbkStrProperty = DependencyProperty.Register("TbkStr", typeof(string), typeof(ImageTextblock), new PropertyMetadata(null)); } }
<Window x:Class="WpfApp364.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:WpfApp364" mc:Ignorable="d" WindowState="Maximized" Title="MainWindow" Height="450" Width="800"> <Window.DataContext> <local:BookVM/> </Window.DataContext> <Grid> <DataGrid ItemsSource="{Binding BooksCollection,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}" CanUserAddRows="False" AutoGenerateColumns="False" VirtualizingPanel.VirtualizationMode="Recycling" VirtualizingPanel.IsVirtualizing="True" VirtualizingPanel.IsContainerVirtualizable="True"> <DataGrid.Columns> <DataGridTextColumn Header="Id" Binding="{Binding Id}"/> <DataGridTextColumn Header="Name" Binding="{Binding Name}"/> <DataGridTemplateColumn Header="Image"> <DataGridTemplateColumn.CellTemplate> <DataTemplate> <local:ImageTextblock ImgUrl="{Binding DataContext.ImageUrl,RelativeSource={RelativeSource Mode=FindAncestor,AncestorType={x:Type DataGridRow}}}" Width="200" Height="500" TbkStr="{Binding DataContext.Name,RelativeSource={RelativeSource Mode=FindAncestor,AncestorType={x:Type DataGridRow}}}"/> <!--<Grid> <Image Source="{Binding ImageUrl,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}" Width="200" Height="500"/> <TextBlock Text="{Binding Name,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}" HorizontalAlignment="Stretch" VerticalAlignment="Center" /> </Grid>--> </DataTemplate> </DataGridTemplateColumn.CellTemplate> </DataGridTemplateColumn> </DataGrid.Columns> </DataGrid> </Grid> </Window> //cs using System; using System.Collections.Generic; using System.Collections.ObjectModel; using System.ComponentModel; using System.Linq; using System.Text; using System.Threading.Tasks; 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 WpfApp364 { /// <summary> /// Interaction logic for MainWindow.xaml /// </summary> public partial class MainWindow : Window { /// <summary> /// Interaction logic for MainWindow.xaml /// </summary> public MainWindow() { InitializeComponent(); } } public class BookVM : INotifyPropertyChanged { public BookVM() { InitData(); } private void InitData() { BooksCollection = new ObservableCollection<Book>(); var imgsList = System.IO.Directory.GetFiles(@"../../Images"); int imgsCnt = imgsList.Count(); for (int i = 0; i < 100000; i++) { BooksCollection.Add(new Book() { Id = i + 1, Name = $"Name_{i + 1}", ImageUrl = imgsList[i % imgsCnt] }); } } public event PropertyChangedEventHandler PropertyChanged; private void OnPropertyChanged(string propName) { var handler = PropertyChanged; if (handler != null) { handler?.Invoke(this, new PropertyChangedEventArgs(propName)); } } private ObservableCollection<Book> booksCollection; public ObservableCollection<Book> BooksCollection { get { return booksCollection; } set { if (value != booksCollection) { booksCollection = value; OnPropertyChanged(nameof(BooksCollection)); } } } } public class DelCmd : ICommand { public event EventHandler CanExecuteChanged { add { CommandManager.RequerySuggested += value; } remove { CommandManager.RequerySuggested -= value; } } private Action<object> execute; private Predicate<object> canExecute; public DelCmd(Action<object> executeValue, Predicate<object> canExecuteValue) { execute = executeValue; canExecute = canExecuteValue; } public bool CanExecute(object parameter) { if (canExecute == null) { return true; } return canExecute(parameter); } public void Execute(object parameter) { execute(parameter); } } public class Book { public int Id { get; set; } public string Name { get; set; } public string ImageUrl { get; set; } } }
标签:DataContext,string,DataGridTemplateColumn,Windows,System,ImageTextblock,Relative From: https://www.cnblogs.com/Fred1987/p/18413122