优化datagrid

Main.Test/App.xaml

@@ -11,7 +11,7 @@
 				<ResourceDictionary Source="pack://application:,,,/HandyControl;component/Themes/Basic.xaml" />
 				<ResourceDictionary Source="pack://application:,,,/HandyControl;component/Themes/SkinDefault.xaml" />
 				<ResourceDictionary Source="pack://application:,,,/HandyControl;component/Themes/Theme.xaml" />
-				<ResourceDictionary Source="Dictionary1.xaml" />
+				<ResourceDictionary Source="Themes/Generic.xaml" />
 				<ResourceDictionary Source="Dictionary2.xaml" />
 			</ResourceDictionary.MergedDictionaries>
 		</ResourceDictionary>

Main.Test/DataGridEx.cs

@@ -1,13 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-using System.Windows.Controls;
-
-namespace Main.Test;
-
-public class DataGridEx : DataGrid
-{
-
-}

Main.Test/DataGridHelper.cs

@@ -63,12 +63,15 @@ public class DataGridHelper
 
 
 	public static DependencyProperty ShowRowNumberProperty = DependencyProperty.RegisterAttached("ShowRowNumber",
-		typeof(bool), typeof(DataGridAttach),
+		typeof(bool), typeof(DataGridHelper),
 		new FrameworkPropertyMetadata(false, FrameworkPropertyMetadataOptions.Inherits, OnShowRowNumberChanged));
 
 	public static bool GetShowRowNumber(DependencyObject target) => (bool)target.GetValue(ShowRowNumberProperty);
 
-	public static void SetShowRowNumber(DependencyObject target, bool value) => target.SetValue(ShowRowNumberProperty, value);
+	public static void SetShowRowNumber(DependencyObject target, bool value)
+	{
+		target.SetValue(ShowRowNumberProperty, value);
+	}
 
 	private static void OnShowRowNumberChanged(DependencyObject target, DependencyPropertyChangedEventArgs e)
 	{
@@ -118,7 +121,10 @@ public class DataGridHelper
 		}
 	}
 
-	private static void DataGrid_LoadingRow(object sender, DataGridRowEventArgs e) => e.Row.Header = (e.Row.GetIndex() + 1).ToString();
+	private static void DataGrid_LoadingRow(object sender, DataGridRowEventArgs e)
+	{
+		  e.Row.Header = (e.Row.GetIndex() + 1).ToString();
+	}
 
 
 
@@ -126,7 +132,6 @@ public class DataGridHelper
 	public static readonly DependencyProperty ShowBorderProperty =
 	   DependencyProperty.RegisterAttached("ShowBorder", typeof(bool),
 		   typeof(DataGridHelper), new PropertyMetadata(false, OnShowBorderChanged));
-
 	public static void SetShowBorder(DependencyObject element, bool value)
 		=> element.SetValue(ShowBorderProperty, value);
 
@@ -166,24 +171,3 @@ public class BorderAdorner : Adorner
 			new Point(header.ActualWidth - 0.5, header.ActualHeight));
 	}
 }
-// 先创建自定义类（如果还没创建）
-public class CustomDataGridColumnHeader : DataGridColumnHeader
-{
-	protected override void OnRender(DrawingContext drawingContext)
-	{
-		base.OnRender(drawingContext);
-
-		// 在这里绘制边框，永远不消失
-		var pen = new Pen(new SolidColorBrush(Colors.LightGray), 1);
-
-		// 绘制右侧竖线
-		drawingContext.DrawLine(pen,
-			new Point(ActualWidth - 0.5, 0),
-			new Point(ActualWidth - 0.5, ActualHeight));
-
-		// 绘制底部横线（如果需要）
-		// drawingContext.DrawLine(pen, 
-		//     new Point(0, ActualHeight - 0.5), 
-		//     new Point(ActualWidth, ActualHeight - 0.5));
-	}
-}

Main.Test/Dictionary1.xaml

@@ -3,16 +3,10 @@
 	xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
 	xmlns:ext="clr-namespace:Main.Test"
 	xmlns:sys="clr-namespace:System;assembly=mscorlib">
-	<!--<FontFamily x:Key="FontFamily">Microsoft YaHei</FontFamily>
-	-->
-	<!--  默认字体大小  -->
-	<!--
-	<sys:Double x:Key="DefaultFontSize">14</sys:Double>-->
-
 
 	<Style x:Key="DefaultCellHeaderStyle" TargetType="DataGridColumnHeader">
 		<Setter Property="UseLayoutRounding" Value="True" />
-		<Setter Property="ext:DataGridHelper.ShowBorder" Value="True" />
+		<!--<Setter Property="ext:DataGridHelper.ShowBorder" Value="True" />-->
 
 		<Setter Property="Height" Value="{Binding ColumnHeaderHeight, RelativeSource={RelativeSource AncestorType={x:Type DataGrid}}}" />
 		<Setter Property="Background" Value="#eeeeee" />
@@ -165,7 +159,6 @@
 					</Grid>
 					<ControlTemplate.Triggers>
 						<Trigger Property="IsSelected" Value="True">
-							<!--  选中后颜色改变  -->
 							<Setter Property="Foreground" Value="White" />
 						</Trigger>
 					</ControlTemplate.Triggers>
@@ -191,6 +184,11 @@
 							VerticalAlignment="Center"
 							TextElement.FontSize="10" />
 					</Border>
+					<ControlTemplate.Triggers>
+						<DataTrigger Binding="{Binding IsSelected, RelativeSource={RelativeSource AncestorType={x:Type DataGridRow}}}" Value="True">
+							<Setter Property="Foreground" Value="White" />
+						</DataTrigger>
+					</ControlTemplate.Triggers>
 				</ControlTemplate>
 			</Setter.Value>
 		</Setter>
@@ -404,7 +402,28 @@
 											Width="{Binding CellsPanelHorizontalOffset, RelativeSource={RelativeSource AncestorType={x:Type DataGrid}}}"
 											Background="#eeeeee"
 											BorderBrush="{Binding BorderBrush, RelativeSource={RelativeSource AncestorType={x:Type DataGrid}}}"
-											BorderThickness="1,0,1,1" />
+											BorderThickness="1,0,1,1">
+											<CheckBox
+												Width="32"
+												HorizontalAlignment="Center"
+												VerticalAlignment="Center"
+												HorizontalContentAlignment="Center"
+												AutomationProperties.Name="全选行"
+												Command="{x:Static ext:StyledDataGrid.ToggleSelectAllCommand}"
+												CommandTarget="{Binding RelativeSource={RelativeSource AncestorType={x:Type ext:StyledDataGrid}}}"
+												IsChecked="{Binding AreAllRowsSelected, RelativeSource={RelativeSource AncestorType={x:Type ext:StyledDataGrid}}, Mode=OneWay}">
+												<CheckBox.Style>
+													<Style BasedOn="{StaticResource {x:Type CheckBox}}" TargetType="CheckBox">
+														<Setter Property="Visibility" Value="Collapsed" />
+														<Style.Triggers>
+															<DataTrigger Binding="{Binding ShowCheckBox, RelativeSource={RelativeSource AncestorType={x:Type ext:StyledDataGrid}}}" Value="True">
+																<Setter Property="Visibility" Value="Visible" />
+															</DataTrigger>
+														</Style.Triggers>
+													</Style>
+												</CheckBox.Style>
+											</CheckBox>
+										</Border>
 
 										<DataGridColumnHeadersPresenter
 											x:Name="PART_ColumnHeadersPresenter"

Main.Test/MainWindow.xaml

@@ -18,14 +18,17 @@
 	mc:Ignorable="d">
 
 	<Grid Margin="0,0,0,0">
-		<DataGrid
+		<local:StyledDataGrid
 			Height="Auto"
 			d:ItemsSource="{d:SampleData ItemCount=10}"
-			hc:DataGridAttach.ShowRowNumber="True"
+			local:DataGridHelper.ShowBorder="False"
+			GridLinesVisibility="All"
 			ItemsSource="{Binding Data}"
-			RowHeaderWidth="30"
-			Style="{StaticResource DefaultDataGridStyle}">
-			<DataGrid.Columns>
+			SelectedRowForeground="White"
+			SelectionMode="Extended"
+			ShowCheckBox="True"
+			ShowRowNumber="True">
+			<local:StyledDataGrid.Columns>
 				<DataGridTextColumn
 					Width="1*"
 					MinWidth="100"
@@ -48,11 +51,11 @@
 					Width="1*"
 					MinWidth="100"
 					Binding="{Binding Qty, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"
-					CellStyle="{DynamicResource DefaultNumberCellStyle}"
+					CellStyle="{DynamicResource StyledNumberCellStyle}"
 					Header="数字"
 					HeaderStyle="{DynamicResource DefaultNumberCellHeaderStyle}"
 					IsReadOnly="True" />
-			</DataGrid.Columns>
-		</DataGrid>
+			</local:StyledDataGrid.Columns>
+		</local:StyledDataGrid>
 	</Grid>
 </tf:WindowBase>

Main.Test/StyledDataGrid.cs

@@ -0,0 +1,130 @@
+using System.Collections.Specialized;
+using System.Globalization;
+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Input;
+using System.Windows.Media;
+using System.Windows.Threading;
+
+namespace Main.Test;
+
+/// <summary>带默认样式、行号和行选择勾选框的 DataGrid。</summary>
+public class StyledDataGrid : DataGrid
+{
+    public static readonly RoutedUICommand ToggleSelectAllCommand = new("全选或取消全选", nameof(ToggleSelectAllCommand), typeof(StyledDataGrid));
+    private static readonly DependencyPropertyKey AreAllRowsSelectedPropertyKey = DependencyProperty.RegisterReadOnly(
+        nameof(AreAllRowsSelected), typeof(bool?), typeof(StyledDataGrid), new PropertyMetadata(false));
+    public static readonly DependencyProperty AreAllRowsSelectedProperty = AreAllRowsSelectedPropertyKey.DependencyProperty;
+    /// <summary>全部选中为 true，部分选中为 null，未选中为 false。</summary>
+    public bool? AreAllRowsSelected => (bool?)GetValue(AreAllRowsSelectedProperty);
+    public static readonly DependencyProperty SelectedRowBackgroundProperty = DependencyProperty.Register(
+        nameof(SelectedRowBackground), typeof(Brush), typeof(StyledDataGrid),
+        new PropertyMetadata(new SolidColorBrush(Color.FromRgb(75, 178, 255))));
+    public static readonly DependencyProperty SelectedRowForegroundProperty = DependencyProperty.Register(
+        nameof(SelectedRowForeground), typeof(Brush), typeof(StyledDataGrid), new PropertyMetadata(Brushes.White));
+    public static readonly DependencyProperty ShowCheckBoxProperty = DependencyProperty.Register(
+        nameof(ShowCheckBox), typeof(bool), typeof(StyledDataGrid), new PropertyMetadata(false, HeaderOptionsChanged));
+    public static readonly DependencyProperty ShowRowNumberProperty = DependencyProperty.Register(
+        nameof(ShowRowNumber), typeof(bool), typeof(StyledDataGrid), new PropertyMetadata(false, HeaderOptionsChanged));
+
+    public Brush SelectedRowBackground { get => (Brush)GetValue(SelectedRowBackgroundProperty); set => SetValue(SelectedRowBackgroundProperty, value); }
+    public Brush SelectedRowForeground { get => (Brush)GetValue(SelectedRowForegroundProperty); set => SetValue(SelectedRowForegroundProperty, value); }
+    /// <summary>勾选状态与行 IsSelected 同步，可通过 SelectedItems 获取。</summary>
+    public bool ShowCheckBox { get => (bool)GetValue(ShowCheckBoxProperty); set => SetValue(ShowCheckBoxProperty, value); }
+    public bool ShowRowNumber { get => (bool)GetValue(ShowRowNumberProperty); set => SetValue(ShowRowNumberProperty, value); }
+
+    static StyledDataGrid()
+    {
+        DefaultStyleKeyProperty.OverrideMetadata(typeof(StyledDataGrid), new FrameworkPropertyMetadata(typeof(StyledDataGrid)));
+    }
+
+    public StyledDataGrid()
+    {
+        CommandBindings.Add(new CommandBinding(ToggleSelectAllCommand, (_, e) =>
+        {
+            if (AreAllRowsSelected == true) UnselectAll();
+            else SelectAll();
+            e.Handled = true;
+        }, (_, e) =>
+        {
+            e.CanExecute = SelectionMode == DataGridSelectionMode.Extended &&
+                SelectionUnit != DataGridSelectionUnit.Cell && SelectableItemCount > 0;
+            e.Handled = true;
+        }));
+        LoadingRow += (_, e) => UpdateRowNumber(e.Row);
+        ItemContainerGenerator.ItemsChanged += (_, _) => QueueHeaderUpdate();
+        Loaded += (_, _) => QueueHeaderUpdate();
+    }
+
+    private static void HeaderOptionsChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
+        => ((StyledDataGrid)d).QueueHeaderUpdate();
+
+    protected override void OnItemsChanged(NotifyCollectionChangedEventArgs e)
+    {
+        base.OnItemsChanged(e);
+        QueueHeaderUpdate();
+        UpdateSelectAllState();
+    }
+
+    private int SelectableItemCount => Items.Count - (Items.Contains(System.Windows.Data.CollectionView.NewItemPlaceholder) ? 1 : 0);
+
+    protected override void OnSelectionChanged(SelectionChangedEventArgs e)
+    {
+        base.OnSelectionChanged(e);
+        UpdateSelectAllState();
+    }
+
+    private void UpdateSelectAllState()
+    {
+        SetValue(AreAllRowsSelectedPropertyKey, SelectedItems.Count == 0 ? false :
+            SelectedItems.Count == SelectableItemCount ? true : (bool?)null);
+        CommandManager.InvalidateRequerySuggested();
+    }
+
+    protected override void OnPropertyChanged(DependencyPropertyChangedEventArgs e)
+    {
+        base.OnPropertyChanged(e);
+        if (e.Property == FontSizeProperty || e.Property == FontFamilyProperty ||
+            e.Property == FontStyleProperty || e.Property == FontWeightProperty || e.Property == FontStretchProperty)
+            QueueHeaderUpdate();
+    }
+
+    private bool headerUpdatePending;
+    private void QueueHeaderUpdate()
+    {
+        if (headerUpdatePending) return;
+        headerUpdatePending = true;
+        Dispatcher.BeginInvoke(DispatcherPriority.Loaded, new Action(() =>
+        {
+            headerUpdatePending = false;
+            // 使用最宽数字估算所有行号，避免虚拟化滚动时行头宽度跳变。
+            var digits = Math.Max(1, Items.Count.ToString(CultureInfo.InvariantCulture).Length);
+            var numberWidth = 0d;
+            if (ShowRowNumber)
+                for (var digit = '0'; digit <= '9'; digit++)
+                {
+                    var text = new FormattedText(new string(digit, digits), CultureInfo.CurrentCulture,
+                        FlowDirection, new Typeface(FontFamily, FontStyle, FontWeight, FontStretch),
+                        FontSize, Foreground ?? Brushes.Black, VisualTreeHelper.GetDpi(this).PixelsPerDip);
+                    numberWidth = Math.Max(numberWidth, Math.Ceiling(text.WidthIncludingTrailingWhitespace) + 16);
+                }
+            SetCurrentValue(RowHeaderWidthProperty, numberWidth + (ShowCheckBox ? 32 : 0) +
+                (ShowRowNumber && ShowCheckBox ? 1 : 0) + (ShowRowNumber || ShowCheckBox ? 1 : 0));
+            foreach (var row in GetRealizedRows(this)) UpdateRowNumber(row);
+        }));
+    }
+
+    private void UpdateRowNumber(DataGridRow row)
+        => row.SetCurrentValue(DataGridRow.HeaderProperty, ShowRowNumber ? (row.GetIndex() + 1).ToString(CultureInfo.CurrentCulture) : null);
+
+    private IEnumerable<DataGridRow> GetRealizedRows(DependencyObject parent)
+    {
+        for (var i = 0; i < VisualTreeHelper.GetChildrenCount(parent); i++)
+        {
+            var child = VisualTreeHelper.GetChild(parent, i);
+            if (child is DataGridRow row && ItemsControl.ItemsControlFromItemContainer(row) == this) yield return row;
+            else if (child is not DataGrid)
+                foreach (var descendant in GetRealizedRows(child)) yield return descendant;
+        }
+    }
+}

Main.Test/Themes/Generic.xaml

@@ -0,0 +1,249 @@
+<ResourceDictionary
+	xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+	xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+	xmlns:local="clr-namespace:Main.Test">
+	<ResourceDictionary.MergedDictionaries>
+		<ResourceDictionary Source="/Main.Test;component/Dictionary1.xaml" />
+	</ResourceDictionary.MergedDictionaries>
+	<Style x:Key="StyledDefaultCellStyle" TargetType="DataGridCell">
+		<Setter Property="BorderThickness" Value="0" />
+		<Setter Property="Background" Value="Transparent" />
+		<Setter Property="Padding" Value="8,0" />
+		<Setter Property="FontSize" Value="{DynamicResource DefaultFontSize}" />
+		<Setter Property="FontFamily" Value="{DynamicResource FontFamily}" />
+		<!--<Setter Property="Foreground" Value="{Binding RelativeSource={RelativeSource AncestorType=DataGrid, Mode=FindAncestor}, Path=Foreground, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" />-->
+		<Setter Property="VerticalContentAlignment" Value="Center" />
+		<Setter Property="HorizontalContentAlignment" Value="Stretch" />
+		<Setter Property="Template">
+			<Setter.Value>
+				<ControlTemplate TargetType="{x:Type DataGridCell}">
+					<Grid>
+						<Border
+							Padding="{TemplateBinding Padding}"
+							Background="{TemplateBinding Background}"
+							BorderBrush="{TemplateBinding BorderBrush}"
+							BorderThickness="{TemplateBinding BorderThickness}">
+							<ContentPresenter
+								HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
+								VerticalAlignment="{TemplateBinding VerticalContentAlignment}"
+								SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" />
+						</Border>
+					</Grid>
+					<ControlTemplate.Triggers>
+						<Trigger Property="IsSelected" Value="True">
+                            <Setter Property="Background" Value="Transparent" />
+							<Setter Property="Foreground" Value="{Binding SelectedRowForeground, RelativeSource={RelativeSource AncestorType={x:Type local:StyledDataGrid}}}" />
+						</Trigger>
+					</ControlTemplate.Triggers>
+				</ControlTemplate>
+			</Setter.Value>
+		</Setter>
+	</Style>
+	<Style x:Key="StyledDefaultRowStyle" TargetType="{x:Type DataGridRow}">
+		<Setter Property="BorderThickness" Value="0,0,1,0" />
+		<Setter Property="Background" Value="{x:Null}" />
+		<Setter Property="FontSize" Value="{DynamicResource DefaultFontSize}" />
+		<Setter Property="FontFamily" Value="{DynamicResource FontFamily}" />
+		<Setter Property="BorderBrush" Value="{Binding RelativeSource={RelativeSource AncestorType=DataGrid, Mode=FindAncestor}, Path=BorderBrush}" />
+		<Setter Property="Template">
+			<Setter.Value>
+				<ControlTemplate TargetType="DataGridRow">
+					<Grid>
+						<Border
+							x:Name="border"
+							Background="{TemplateBinding Background}"
+							BorderBrush="{TemplateBinding BorderBrush}"
+							BorderThickness="{TemplateBinding BorderThickness}" />
+						<SelectiveScrollingGrid>
+							<SelectiveScrollingGrid.ColumnDefinitions>
+								<ColumnDefinition Width="Auto" />
+								<ColumnDefinition Width="*" />
+							</SelectiveScrollingGrid.ColumnDefinitions>
+							<SelectiveScrollingGrid.RowDefinitions>
+								<RowDefinition Height="*" />
+								<RowDefinition Height="Auto" />
+							</SelectiveScrollingGrid.RowDefinitions>
+							<DataGridCellsPresenter
+								Grid.Column="1"
+								ItemsPanel="{TemplateBinding ItemsPanel}"
+								SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" />
+							<DataGridDetailsPresenter
+								x:Name="DetailsPresenter"
+								Grid.Row="1"
+								Grid.Column="1"
+								SelectiveScrollingGrid.SelectiveScrollingOrientation="{Binding AreRowDetailsFrozen, ConverterParameter={x:Static SelectiveScrollingOrientation.Vertical}, Converter={x:Static DataGrid.RowDetailsScrollingConverter}, RelativeSource={RelativeSource AncestorType={x:Type DataGrid}}}"
+								Visibility="{TemplateBinding DetailsVisibility}" />
+							<DataGridRowHeader
+								Grid.RowSpan="2"
+								SelectiveScrollingGrid.SelectiveScrollingOrientation="Vertical"
+								Visibility="{Binding HeadersVisibility, ConverterParameter={x:Static DataGridHeadersVisibility.Row}, Converter={x:Static DataGrid.HeadersVisibilityConverter}, RelativeSource={RelativeSource AncestorType={x:Type DataGrid}}}" />
+						</SelectiveScrollingGrid>
+						<Grid
+							x:Name="fousIcon"
+							IsHitTestVisible="False"
+							Opacity="0"
+							Visibility="Collapsed">
+							<Path
+								Width="10"
+								Height="10"
+								HorizontalAlignment="Left"
+								VerticalAlignment="Top"
+								Data="M0,0 L0,0 50,0 50,10 10,10 10,50 0,50 0,52 z"
+								Fill="#4BB2FF"
+								RenderTransformOrigin="0.5,0.5"
+								Stretch="Fill">
+								<Path.RenderTransform>
+									<TransformGroup>
+										<ScaleTransform />
+										<SkewTransform />
+										<RotateTransform Angle="0" />
+										<TranslateTransform />
+									</TransformGroup>
+								</Path.RenderTransform>
+							</Path>
+							<Path
+								Width="10"
+								Height="10"
+								HorizontalAlignment="Right"
+								VerticalAlignment="Top"
+								Data="M0,0 L0,0 50,0 50,10 10,10 10,50 0,50 0,52 z"
+								Fill="#4BB2FF"
+								RenderTransformOrigin="0.5,0.5"
+								Stretch="Fill">
+								<Path.RenderTransform>
+									<TransformGroup>
+										<ScaleTransform />
+										<SkewTransform />
+										<RotateTransform Angle="90" />
+										<TranslateTransform />
+									</TransformGroup>
+								</Path.RenderTransform>
+							</Path>
+							<Path
+								Width="10"
+								Height="10"
+								HorizontalAlignment="Right"
+								VerticalAlignment="Bottom"
+								Data="M0,0 L0,0 50,0 50,10 10,10 10,50 0,50 0,52 z"
+								Fill="#4BB2FF"
+								RenderTransformOrigin="0.5,0.5"
+								Stretch="Fill">
+								<Path.RenderTransform>
+									<TransformGroup>
+										<ScaleTransform />
+										<SkewTransform />
+										<RotateTransform Angle="180" />
+										<TranslateTransform />
+									</TransformGroup>
+								</Path.RenderTransform>
+							</Path>
+							<Path
+								Width="10"
+								Height="10"
+								HorizontalAlignment="Left"
+								VerticalAlignment="Bottom"
+								Data="M0,0 L0,0 50,0 50,10 10,10 10,50 0,50 0,52 z"
+								Fill="#4BB2FF"
+								RenderTransformOrigin="0.5,0.5"
+								Stretch="Fill">
+								<Path.RenderTransform>
+									<TransformGroup>
+										<ScaleTransform />
+										<SkewTransform />
+										<RotateTransform Angle="-90" />
+										<TranslateTransform />
+									</TransformGroup>
+								</Path.RenderTransform>
+							</Path>
+						</Grid>
+					</Grid>
+					<ControlTemplate.Triggers>
+						<Trigger Property="IsSelected" Value="True">
+							<Setter TargetName="fousIcon" Property="Opacity" Value="1" />
+							<Setter Property="Foreground" Value="{Binding SelectedRowForeground, RelativeSource={RelativeSource AncestorType={x:Type local:StyledDataGrid}}}" />
+							<Setter TargetName="border" Property="Background" Value="{Binding SelectedRowBackground, RelativeSource={RelativeSource AncestorType={x:Type local:StyledDataGrid}}}" />
+						</Trigger>
+						<Trigger Property="DetailsVisibility" Value="Visible">
+							<Setter TargetName="DetailsPresenter" Property="Margin" Value="0,0,1,0" />
+						</Trigger>
+
+					</ControlTemplate.Triggers>
+				</ControlTemplate>
+			</Setter.Value>
+		</Setter>
+	</Style>
+	<Style
+		x:Key="StyledRowHeaderStyle"
+		BasedOn="{StaticResource DefaultRowHeaderStyle}"
+		TargetType="DataGridRowHeader">
+		<Setter Property="Template">
+			<Setter.Value>
+				<ControlTemplate TargetType="DataGridRowHeader">
+					<Border
+						Background="Transparent"
+						BorderBrush="{TemplateBinding BorderBrush}"
+						BorderThickness="0,0,1,1">
+						<DockPanel LastChildFill="True">
+							<Border
+								x:Name="CheckArea"
+								Width="32"
+								DockPanel.Dock="Right"
+								Visibility="Collapsed">
+								<CheckBox
+									HorizontalAlignment="Center"
+									VerticalAlignment="Center"
+									AutomationProperties.Name="选择行"
+									Focusable="True"
+									IsChecked="{Binding IsSelected, RelativeSource={RelativeSource AncestorType=DataGridRow}, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" />
+							</Border>
+							<Border
+								x:Name="Divider"
+								Width="1"
+								Background="{TemplateBinding BorderBrush}"
+								DockPanel.Dock="Right"
+								Visibility="Collapsed" />
+							<ContentPresenter
+								x:Name="Number"
+                                Content="{Binding Header, RelativeSource={RelativeSource AncestorType=DataGridRow}}"
+								Margin="8,0"
+								HorizontalAlignment="Center"
+								VerticalAlignment="Center"
+								Visibility="Collapsed" />
+						</DockPanel>
+					</Border>
+					<ControlTemplate.Triggers>
+						<DataTrigger Binding="{Binding ShowRowNumber, RelativeSource={RelativeSource AncestorType=local:StyledDataGrid}}" Value="True">
+							<Setter TargetName="Number" Property="Visibility" Value="Visible" />
+						</DataTrigger>
+						<DataTrigger Binding="{Binding ShowCheckBox, RelativeSource={RelativeSource AncestorType=local:StyledDataGrid}}" Value="True">
+							<Setter TargetName="CheckArea" Property="Visibility" Value="Visible" />
+						</DataTrigger>
+						<MultiDataTrigger>
+							<MultiDataTrigger.Conditions>
+								<Condition Binding="{Binding ShowRowNumber, RelativeSource={RelativeSource AncestorType=local:StyledDataGrid}}" Value="True" />
+								<Condition Binding="{Binding ShowCheckBox, RelativeSource={RelativeSource AncestorType=local:StyledDataGrid}}" Value="True" />
+							</MultiDataTrigger.Conditions>
+							<Setter TargetName="Divider" Property="Visibility" Value="Visible" />
+						</MultiDataTrigger>
+					</ControlTemplate.Triggers>
+				</ControlTemplate>
+			</Setter.Value>
+		</Setter>
+	</Style>
+
+			<Style
+				x:Key="StyledNumberCellStyle"
+				BasedOn="{StaticResource StyledDefaultCellStyle}"
+				TargetType="DataGridCell">
+				<Setter Property="HorizontalContentAlignment" Value="Right" />
+			</Style>
+
+	<Style BasedOn="{StaticResource DefaultDataGridStyle}" TargetType="local:StyledDataGrid">
+
+		<Setter Property="SelectionMode" Value="Extended" />
+		<Setter Property="SelectionUnit" Value="FullRow" />
+		<Setter Property="RowStyle" Value="{StaticResource StyledDefaultRowStyle}" />
+		<Setter Property="CellStyle" Value="{StaticResource StyledDefaultCellStyle}" />
+		<Setter Property="RowHeaderStyle" Value="{StaticResource StyledRowHeaderStyle}" />
+	</Style>
+</ResourceDictionary>

Main.Test/ViewModels/MainViewModel.cs

@@ -32,7 +32,7 @@ internal class MainViewModel
 		var singleItem = itemFaker.Generate();
 
 		// 生成100个对象
-		Data = itemFaker.Generate(100);
+		Data = itemFaker.Generate(1000);
 		//Data.Clear();
 	}
 }