WPF进阶技巧和实战03-控件（5-列表、树、网格04）
系列文章链接
- WPF进阶技巧和实战01-小技巧
- WPF进阶技巧和实战02-布局
- WPF进阶技巧和实战03-控件（1-控件及内容控件）
- WPF进阶技巧和实战03-控件（2-特殊容器）
- WPF进阶技巧和实战03-控件（5-列表、树、网格01）
- WPF进阶技巧和实战03-控件（5-列表、树、网格02）
- WPF进阶技巧和实战03-控件（5-列表、树、网格03）
- WPF进阶技巧和实战03-控件（5-列表、树、网格04）
- WPF进阶技巧和实战04-资源
- WPF进阶技巧和实战05-样式与行为
- WPF进阶技巧和实战06-控件模板
- WPF进阶技巧和实战07--自定义元素01
- WPF进阶技巧和实战07--自定义元素02
- WPF进阶技巧和实战08-依赖属性与绑定01
- WPF进阶技巧和实战08-依赖属性与绑定02
- WPF进阶技巧和实战08-依赖属性与绑定03
ListView控件
ListView继承自简单的没有特色的ListBox，增加了对基于列显示的支持，并增加了快速切换视图或显示模式的能力，而不需要重新绑定数据以重新构建列表。
ListView类继承自ListBox类，并使用View属性进行扩展（可以创建丰富的列表）。通过两个样式来设置View，一个用于ListView控件，一个用于ListView控件的项。
使用GridView创建列
GridView类继承自ViewBase类，表示具有多列的列表视图，通过GridView.Columns集合添加GridViewColumn对象来定义列。
<ListView ItemsSource="{Binding DataList}">
<ListView.View>
<GridView>
<GridViewColumn Width="80" Header="{ex:Lang Key={x:Static langs:LangKeys.Index}}" DisplayMemberBinding="{Binding Index}"/>
<GridViewColumn Width="100" Header="{ex:Lang Key={x:Static langs:LangKeys.Name}}" DisplayMemberBinding="{Binding Name}"/>
<GridViewColumn Width="200" Header="{ex:Lang Key={x:Static langs:LangKeys.Remark}}" DisplayMemberBinding="{Binding Remark}"/>
</GridView>
</ListView.View>
</ListView>
Head属性提供放在列顶部的文本，DisplayMemberBinding设置每个数据项要显示的信息。
- 改变列的尺寸，可以设置固定宽度，但是会出现过长的数据被截断。没有MaxWidth和MinWidth属性。如果希望完全禁止改变列的尺寸，唯一办法就是为标题提供新模板
- 单元格模板，为了显示数据，可以使用更高级的方式，为每个列设置CellTemplate属性（使用数据模板）
<ListView Margin="5" Name="lstProducts" GridViewColumnHeader.Click="gridViewColumn_Click">
<!--<ListView.ItemContainerStyle>
<Style>
<Setter Property="ListViewItem.Background" Value="{Binding Converter={StaticResource PriceToBackgroundConverter}}" />
</Style>
</ListView.ItemContainerStyle>-->
<ListView.View>
<GridView>
<GridView.Columns>
<GridViewColumn Header="Name" DisplayMemberBinding="{Binding Path=ModelName}" >
</GridViewColumn>
<GridViewColumn Header="Model" DisplayMemberBinding="{Binding Path=ModelNumber}" />
<GridViewColumn Header="Description" Width="300">
<GridViewColumn.CellTemplate>
<DataTemplate>
<TextBlock Text="{Binding Path=Description}" TextWrapping="Wrap"></TextBlock>
</DataTemplate>
</GridViewColumn.CellTemplate>
</GridViewColumn>
<GridViewColumn Header="Picture" >
<GridViewColumn.CellTemplate>
<DataTemplate>
<Image Source="{Binding Path=ProductImagePath, Converter={StaticResource ImagePathConverter}}"></Image>
</DataTemplate>
</GridViewColumn.CellTemplate>
</GridViewColumn>
<GridViewColumn Header="Price" DisplayMemberBinding="{Binding Path=UnitCost, StringFormat={}{0:C} }" >
</GridViewColumn>
</GridView.Columns>
</GridView>
</ListView.View>
</ListView>
- 自定义列标题，如果希望用自己的内容填充列标题，但又不希望单独给每列指定内容，可以使用GridViewColumn.HeaderTemplate属性定一个数据模板，这个数据模板可以绑定到Header属性中指定内容。如果希望重新定义指定列的标题，可以使用GridViewColumn.HeaderContainerStyle属性提供样式。如果希望以相同的方式重新定义所有列的标题，就需要使用GridView.ColumnHeaderContainerStyle属性。可以使用GridViewColumn.HeaderTemplate和GridView.ColumnHeaderTemplate改变指定列和所有列的外观。
自定义ListView的样式
可以通过改变ListView的样式来实现自定义的样式和模板
<Style x:Key="GridViewColumnHeaderGripper" TargetType="Thumb">
<Setter Property="Canvas.Right" Value="-9"/>
<Setter Property="Width" Value="18"/>
<Setter Property="Height" Value="{Binding ActualHeight, RelativeSource={RelativeSource TemplatedParent}}"/>
<Setter Property="Padding" Value="0"/>
<Setter Property="Background" Value="Transparent"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="Thumb">
<Border Background="Transparent" Padding="{TemplateBinding Padding}">
<Rectangle Fill="{TemplateBinding Background}" HorizontalAlignment="Center" Width="1"/>
</Border>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
<Style TargetType="GridViewColumnHeader">
<Setter Property="VerticalContentAlignment" Value="Center"/>
<Setter Property="HorizontalContentAlignment" Value="Left"/>
<Setter Property="Foreground" Value="{DynamicResource PrimaryTextBrush}"/>
<Setter Property="Padding" Value="12,6,12,12"/>
<Setter Property="MinHeight" Value="44"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="GridViewColumnHeader">
<hc:SimplePanel SnapsToDevicePixels="true">
<Border x:Name="HeaderBorder" BorderBrush="{TemplateBinding BorderBrush}" Background="Transparent">
<ContentPresenter x:Name="HeaderContent" HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" Margin="{TemplateBinding Padding}" RecognizesAccessKey="True" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" VerticalAlignment="{TemplateBinding VerticalContentAlignment}"/>
</Border>
<Canvas>
<Thumb x:Name="PART_HeaderGripper" Style="{StaticResource GridViewColumnHeaderGripper}"/>
</Canvas>
</hc:SimplePanel>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
<Style x:Key="ListViewItemBaseStyle" TargetType="ListViewItem">
<Setter Property="Background" Value="{DynamicResource RegionBrush}"/>
<Setter Property="BorderThickness" Value="0"/>
<Setter Property="Foreground" Value="{DynamicResource PrimaryTextBrush}"/>
<Setter Property="SnapsToDevicePixels" Value="true"/>
<Setter Property="Margin" Value="0,0,0,4"/>
<Setter Property="Padding" Value="{StaticResource DefaultControlPadding}"/>
<Setter Property="MinHeight" Value="44"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="ListViewItem">
<Border CornerRadius="4" x:Name="Bd" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" Padding="{TemplateBinding Padding}" SnapsToDevicePixels="true">
<GridViewRowPresenter Content="{TemplateBinding Content}" Columns="{TemplateBinding GridView.ColumnCollection}"/>
</Border>
</ControlTemplate>
</Setter.Value>
</Setter>
<Style.Triggers>
<Trigger Property="IsMouseOver" Value="true">
<Setter Property="Background" Value="{DynamicResource DarkDefaultBrush}"/>
</Trigger>
<Trigger Property="IsSelected" Value="True">
<Setter Property="Background" Value="{DynamicResource PrimaryBrush}"/>
<Setter Property="TextElement.Foreground" Value="{DynamicResource TextIconBrush}"/>
</Trigger>
<MultiTrigger>
<MultiTrigger.Conditions>
<Condition Property="IsSelected" Value="true"/>
<Condition Property="Selector.IsSelectionActive" Value="false"/>
</MultiTrigger.Conditions>
<Setter Property="Background" Value="{DynamicResource DarkDefaultBrush}"/>
<Setter Property="Foreground" Value="{DynamicResource PrimaryTextBrush}"/>
</MultiTrigger>
</Style.Triggers>
</Style>
<Style TargetType="ListView">
<Setter Property="Background" Value="{DynamicResource SecondaryRegionBrush}"/>
<Setter Property="BorderBrush" Value="{DynamicResource BorderBrush}"/>
<Setter Property="BorderThickness" Value="1"/>
<Setter Property="Padding" Value="6"/>
<Setter Property="Foreground" Value="{DynamicResource PrimaryTextBrush}"/>
<Setter Property="ScrollViewer.HorizontalScrollBarVisibility" Value="Auto"/>
<Setter Property="ScrollViewer.VerticalScrollBarVisibility" Value="Auto"/>
<Setter Property="ScrollViewer.CanContentScroll" Value="true"/>
<Setter Property="ScrollViewer.PanningMode" Value="Both"/>
<Setter Property="Stylus.IsFlicksEnabled" Value="False"/>
<Setter Property="VerticalContentAlignment" Value="Center"/>
<Setter Property="ItemContainerStyle" Value="{StaticResource ListViewItemBaseStyle}"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="ListView">
<Border BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" Padding="{TemplateBinding Padding}" SnapsToDevicePixels="True">
<hc:ToggleBlock IsChecked="{Binding HasItems,RelativeSource={RelativeSource TemplatedParent},Mode=OneWay}" VerticalContentAlignment="Stretch" HorizontalContentAlignment="Stretch">
<hc:ToggleBlock.CheckedContent>
<ScrollViewer>
<Grid Background="{TemplateBinding Background}" SnapsToDevicePixels="True">
<Grid.RowDefinitions>
<RowDefinition Height="Auto"/>
<RowDefinition Height="*"/>
</Grid.RowDefinitions>
<GridViewHeaderRowPresenter AllowsColumnReorder="{Binding View.AllowsColumnReorder, RelativeSource={RelativeSource TemplatedParent}}" ColumnHeaderContainerStyle="{Binding View.ColumnHeaderContainerStyle, RelativeSource={RelativeSource TemplatedParent}}" ColumnHeaderToolTip="{Binding View.ColumnHeaderToolTip, RelativeSource={RelativeSource TemplatedParent}}" ColumnHeaderContextMenu="{Binding View.ColumnHeaderContextMenu, RelativeSource={RelativeSource TemplatedParent}}" ColumnHeaderTemplate="{Binding View.ColumnHeaderTemplate, RelativeSource={RelativeSource TemplatedParent}}" Columns="{Binding View.Columns, RelativeSource={RelativeSource TemplatedParent}}" Margin="2,0" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
<ItemsPresenter Grid.Row="1" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
</Grid>
</ScrollViewer>
</hc:ToggleBlock.CheckedContent>
<hc:ToggleBlock.UnCheckedContent>
<hc:Empty />
</hc:ToggleBlock.UnCheckedContent>
</hc:ToggleBlock>
</Border>
</ControlTemplate>
</Setter.Value>
</Setter>
<Style.Triggers>
<MultiTrigger>
<MultiTrigger.Conditions>
<Condition Property="IsGrouping" Value="true"/>
<Condition Property="VirtualizingPanel.IsVirtualizingWhenGrouping" Value="false"/>
</MultiTrigger.Conditions>
<Setter Property="ScrollViewer.CanContentScroll" Value="false"/>
</MultiTrigger>
</Style.Triggers>
</Style>
TreeView控件
TreeView是层次化容器，这意味着可创建多层数据展示。例如，可创建在第一级中显示类别组，并在每个类别节点中显示相关产品的TreeView控件。
TreeView控件本质上时驻留TreeViewItem对象的特殊ItemsControl控件。每个TreeViewItem对象都是单独的ItemsControl控件，所以可以嵌套的包含更多的TreeViewItem对象。
数据绑定
我们可以通过下面的数据源进行绑定到TreeView的ItemsSrouce。通过创建属性提供另一个集合的集合，是实现数据绑定导航父子关系的诀窍。
public class TreeItem : BindableBase
{
public TreeItem(object Item)
{
this.Item = Item;
}
//父
public TreeItem Parent { get => _parent; set => SetProperty(ref _parent, value); }
private TreeItem _parent;
//子
public ObservableCollection<TreeItem> Children { get; set; } = new ObservableCollection<TreeItem>();
//级别
public int IndexLevel { get; set; }
//节点的数据
public object Item { get => _item; set => SetProperty(ref _item, value); }
private object _item;
//节点图标路径
public string ItemIcon { get; set; }
//是否展开
public bool IsExpanded { get => _isExpanded; set => SetProperty(ref _isExpanded, value); }
private bool _isExpanded;
//CheckBox是否选中
public bool? IsChecked { get => _isChecked; set => SetIsChecked(value, true, true); }
private bool? _isChecked;
private void SetIsChecked(bool? value, bool checkedChildren, bool checkedParent)
{
if (_isChecked == value) return;
_isChecked = value;
//选中和取消子类
if (checkedChildren && value.HasValue && Children != null)
Children.ToList().ForEach(ch => ch.SetIsChecked(value, true, false));
//选中和取消父类
if (checkedParent && this.Parent != null)
this.Parent.CheckParentCheckState();
//通知更改
this.SetProperty(ref _isChecked, value);
}
//检查父类是否选中（如果父类的子类中有一个和第一个子类的状态不一样父类ischecked为null）
private void CheckParentCheckState()
{
bool? _currentState = this.IsChecked;
bool? _firstState = null;
for (int i = 0; i < this.Children.Count(); i++)
{
bool? childrenState = this.Children[i].IsChecked;
if (i == 0)
{
_firstState = childrenState;
}
else if (_firstState != childrenState)
{
_firstState = null;
}
}
if (_firstState != null) _currentState = _firstState;
SetIsChecked(_firstState, false, true);
}
//选中的行 IsSelected
public bool? IsSelected
{
get => _isSelected;
set
{
_isSelected = value;
this.SetProperty(ref _isSelected, value);
if (value.HasValue && value.Value)
{
SelectedTreeItem = this;
//MessageBox.Show("选中的是" + SelectedTreeItem.Name);
}
else
SelectedTreeItem = null;
}
}
private bool? _isSelected;
//选中的数据
public TreeItem SelectedTreeItem { get; set; }
//创建树
public void CreateTreeWithChildren(TreeItem children, bool? isChecked = null)
{
this.Children.Add(children);
children.Parent = this;
children.IsChecked = isChecked;
}
}
TreeViewItem类继承自HeaderedItemsControl类，添加了Header属性，该属性包含了希望为树中每个项显示的内容（通常是文本）。如果显示非文本内容，最好使用TreeViewItem封装器，并通过TreeViewItem.Header属性提供内容，如果显示非UIElement对象，也可以通过HeaderTemplate属性的数据模板设置格式。
<TreeView ItemsSource="{Binding TreeItemsOrganization}" Style="{DynamicResource TreeViewStyleMain}"
Background="White" BorderThickness="0"
SelectedItemChanged="TreeView_SelectedItemChanged" >
<!--cm:Message.Attach="[Event SeletedItemChanged] = [Action SeletedItemChanged]"> -->
<TreeView.ItemContainerStyle>
<Style TargetType="{x:Type TreeViewItem}">
<Setter Property="IsExpanded" Value="{Binding Path=IsExpanded,Mode=TwoWay}" />
<Setter Property="IsSelected" Value="{Binding Path=IsSelected,Mode=TwoWay}"/>
</Style>
</TreeView.ItemContainerStyle>
<TreeView.Resources>
<HierarchicalDataTemplate DataType="{x:Type local:TreeItem}" ItemsSource="{Binding Path=Children,Mode=OneWay}" >
<StackPanel x:Name="My_SP" Orientation="Horizontal" Margin="2">
<Image VerticalAlignment="Center" Source="{Binding itemIcon}" />
<ContentPresenter Content="{Binding Path=Item,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}" Margin="2,0"/>
</StackPanel>
</HierarchicalDataTemplate>
</TreeView.Resources>
</TreeView>
上述代码中，通过HierarchicalDataTemplate来设置TreeView.ItemTemplate属性，而不是DataTemplate对象。前者能够封装第二个模板，然后HierarchicalDataTemplate就可以从第一层数据中提起项的集合，提供给第二层的模板：
<TreeView.ItemTemplate>
</TreeView.ItemTemplate>
更复杂一点的就是：
实际上，上述代码有两个模板，每个模板用于书控件中的每个层次。第二个模板使用从第一个模板中选择的项作为其数据源。
自定义控件的样式和模板：
<Style x:Key="ExpandCollapseToggleStyle" TargetType="ToggleButton">
<Setter Property="Focusable" Value="False" />
<Setter Property="Width" Value="16" />
<Setter Property="Height" Value="16" />
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="ToggleButton">
<Border Width="16" Height="16" Padding="4" Background="Transparent">
<Path x:Name="ExpandPath" Data="{StaticResource TreeArrow}" Fill="{Binding Foreground, RelativeSource={RelativeSource AncestorType=TreeViewItem}}" RenderTransformOrigin="0.5,0.5" Stretch="Uniform">
<Path.RenderTransform>
<RotateTransform Angle="-90" />
</Path.RenderTransform>
</Path>
</Border>
<ControlTemplate.Triggers>
<Trigger Property="IsChecked" Value="True">
<Setter TargetName="ExpandPath" Property="RenderTransform">
<Setter.Value>
<RotateTransform Angle="0" />
</Setter.Value>
</Setter>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
<Style x:Key="TreeViewItemBaseStyle" BasedOn="{StaticResource BaseStyle}" TargetType="TreeViewItem">
<Setter Property="FocusVisualStyle" Value="{StaticResource FocusVisualRadius0Margin0}" />
<Setter Property="Background" Value="Transparent" />
<Setter Property="Padding" Value="10,0" />
<Setter Property="BorderThickness" Value="0" />
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="TreeViewItem">
<Grid>
<Grid.RowDefinitions>
<RowDefinition MinHeight="{StaticResource DefaultControlHeight}" />
<RowDefinition />
</Grid.RowDefinitions>
<Border
x:Name="Bd"
Padding="{TemplateBinding Padding}"
Background="{TemplateBinding Background}"
BorderBrush="{TemplateBinding BorderBrush}"
BorderThickness="{TemplateBinding BorderThickness}"
CornerRadius="{Binding Path=(hc:BorderElement.CornerRadius), RelativeSource={RelativeSource TemplatedParent}}"
SnapsToDevicePixels="true">
<DockPanel Margin="{Binding Converter={StaticResource TreeViewItemMarginConverter}, RelativeSource={RelativeSource TemplatedParent}}" LastChildFill="True">
<ToggleButton x:Name="Expander" ClickMode="Press" IsChecked="{Binding IsExpanded, RelativeSource={RelativeSource TemplatedParent}}" Style="{StaticResource ExpandCollapseToggleStyle}" />
<ContentPresenter x:Name="PART_Header" VerticalAlignment="Center" ContentSource="Header" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" />
</DockPanel>
</Border>
<ItemsPresenter x:Name="ItemsHost" Grid.Row="1" />
</Grid>
<ControlTemplate.Triggers>
<Trigger SourceName="Bd" Property="IsMouseOver" Value="true">
<Setter TargetName="Bd" Property="Background" Value="{DynamicResource SecondaryRegionBrush}" />
</Trigger>
<Trigger Property="IsExpanded" Value="false">
<Setter TargetName="ItemsHost" Property="Visibility" Value="Collapsed" />
</Trigger>
<Trigger Property="HasItems" Value="false">
<Setter TargetName="Expander" Property="Visibility" Value="Hidden" />
</Trigger>
<Trigger Property="IsSelected" Value="true">
<Setter TargetName="Bd" Property="Background" Value="{DynamicResource PrimaryBrush}" />
<Setter Property="Foreground" Value="{DynamicResource TextIconBrush}" />
</Trigger>
<MultiTrigger>
<MultiTrigger.Conditions>
<Condition Property="IsSelected" Value="true" />
<Condition Property="IsSelectionActive" Value="false" />
</MultiTrigger.Conditions>
<Setter TargetName="Bd" Property="Background" Value="{DynamicResource DarkDefaultBrush}" />
<Setter Property="Foreground" Value="{DynamicResource PrimaryTextBrush}" />
</MultiTrigger>
<Trigger Property="IsEnabled" Value="false">
<Setter Property="Foreground" Value="{StaticResource {x:Static SystemColors.GrayTextBrushKey}}" />
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
<Style x:Key="TreeViewBaseStyle" BasedOn="{StaticResource BaseStyle}" TargetType="TreeView">
<Setter Property="Focusable" Value="False" />
<Setter Property="Background" Value="{DynamicResource RegionBrush}" />
<Setter Property="BorderBrush" Value="{DynamicResource BorderBrush}" />
<Setter Property="BorderThickness" Value="1" />
<Setter Property="Padding" Value="0" />
<Setter Property="ScrollViewer.HorizontalScrollBarVisibility" Value="Auto" />
<Setter Property="ScrollViewer.VerticalScrollBarVisibility" Value="Auto" />
<Setter Property="ScrollViewer.PanningMode" Value="Both" />
<Setter Property="hc:ScrollViewer.IsInertiaEnabled" Value="False" />
<Setter Property="Stylus.IsFlicksEnabled" Value="False" />
<Setter Property="VerticalContentAlignment" Value="Center" />
<Setter Property="VirtualizingPanel.IsVirtualizing" Value="True" />
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="TreeView">
<Border x:Name="Bd" Background="{TemplateBinding Background}" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" SnapsToDevicePixels="true">
<hc:ToggleBlock HorizontalContentAlignment="Stretch" VerticalContentAlignment="Stretch" IsChecked="{Binding HasItems, RelativeSource={RelativeSource TemplatedParent}, Mode=OneWay}">
<hc:ToggleBlock.CheckedContent>
<hc:ScrollViewer
x:Name="_tv_scrollviewer_"
Padding="{TemplateBinding Padding}"
Background="{TemplateBinding Background}"
CanContentScroll="false"
Focusable="false"
HorizontalScrollBarVisibility="{TemplateBinding ScrollViewer.HorizontalScrollBarVisibility}"
IsInertiaEnabled="{Binding Path=(hc:ScrollViewer.IsInertiaEnabled), RelativeSource={RelativeSource TemplatedParent}}"
SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"
Template="{StaticResource ScrollViewerBaseControlTemplate}"
VerticalScrollBarVisibility="{TemplateBinding ScrollViewer.VerticalScrollBarVisibility}">
<ItemsPresenter />
</hc:ScrollViewer>
</hc:ToggleBlock.CheckedContent>
<hc:ToggleBlock.UnCheckedContent>
<hc:Empty />
</hc:ToggleBlock.UnCheckedContent>
</hc:ToggleBlock>
</Border>
<ControlTemplate.Triggers>
<Trigger Property="IsEnabled" Value="false">
<Setter TargetName="Bd" Property="Background" Value="{StaticResource {x:Static SystemColors.ControlBrushKey}}" />
</Trigger>
<Trigger Property="VirtualizingPanel.IsVirtualizing" Value="true">
<Setter TargetName="_tv_scrollviewer_" Property="CanContentScroll" Value="true" />
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
<Style.Triggers>
<Trigger Property="VirtualizingPanel.IsVirtualizing" Value="true">
<Setter Property="ItemsPanel">
<Setter.Value>
<ItemsPanelTemplate>
<VirtualizingStackPanel />
</ItemsPanelTemplate>
</Setter.Value>
</Setter>
</Trigger>
</Style.Triggers>
</Style>
DataGrid控件
DataGrid是最完备的数据显示工具。他将数据分割到包含行列的网格中，就想ListView控件，但是DataGrid控件具有其他格式化特性（如：冻结列、设置单行样式），并且支持就地编辑数据。DataGrid控件从对象集合获取信息并在具有行和单元格的网络中显示信息。每行和单独的对象相对应，并且每列和对象的某个属性相对应。其选择模型允许选择一行、多行或者一些单元格的组合。
为创建暂时应急的DataGrid控件，可使用自动列生成功能：
AutoGenerateColumns=true
DataGrid的基本显示属性：
| 名称 | 说明 |
|---|---|
| RowBackground AlternatingRowBackground |
用于绘制每行北京的画刷，并且决定是否使用不同的背景颜色绘制交替行，从而更容易区分行 |
| ColumnHeaderHeight | 位于DataGrid控件顶部的列标题行的高度 |
| RowHeaderWidth | 具有行题头的列的宽度。该列在网格的最左边，不显示任何数据。该列使用箭头指示当前选择的行，使用圈住的箭头指示正在编辑的行 |
| ColumnWidth | DataGridLength对象，用于设置每列默认宽度的尺寸改变模式 |
| RowHeight | 每行的高度。如果准备在DataGrid控件中显示多行文本或者不同的内容（图像等），该设置很有用。与列不同，用户不能改变行的尺寸 |
| GridLinesVisibility | 确定是否显示网格线的DataGridGridLines枚举值 |
| VerticalGridLinesBrush | 用于绘制列之间网格线的画刷 |
| HorizontalGridLinesBrush | 用于绘制行之间网格线的画刷 |
| HeadersVisibity | 确定显示哪个题头的DataGrisHeaders枚举值 |
| HorizontalScrollBarVisibility VerticalScrollBarVisibility |
去顶是否显示滚动条的枚举值。默认是Auto（当需要时显示） |
改变列的尺寸与重新安排列
当显示自动生成的列时，DataGrid控件尝试根据DataGrid.ColumnWidth属性智能地改变每列的宽度。
为设置ColumnWidth属性，需要提供DataGridLength对象。DataGridLength对象能够指定确切的尺寸或者指定特定的尺寸改变模式，从而让DataGrid控件自动完成。
grid.ColumnWidth=new DataGridLength(150);
使用足够的列宽来适应他们的题头文本：
grid.ColumnWidth=DataGridLength.SizeToHeader；
加宽每一列以适应当前视图中最宽的值：
grid.ColumnWidth=DataGridLength.SizeToCells；
加宽每一列以适应最大的显示值或者题头文本，使用其中的最大值：
grid.ColumnWidth=DataGridLength.Auto；
通常，用户能够通过将列边缘拖动到任意位置来改变列的尺寸。可通过将CanUserResizeColumns属性设置为false来阻止这一行为。也可以将列的CanUserResize属性设置为false，阻止用户改变特定列的尺寸。通过CanUserReorderColumns属性或者特定列的CanUserReorder属性设置为false来阻止用户改变列的位置。
定义列
将AutoGenerateColumns属性设置为false以关闭自动列生成功能。然后可以使用希望的设置和指定的顺序，明确地定义希望使用的列。使用合适的列对象来填充DataGrid.Columns集合。
- DataGridTextColumn：这种列对于大部分数据类型时标准选择，值转换成文本
- DataGridCheckBoxColumn：列显示复选框。通常是只读的，当编辑行时，会成为普通的复选框
- DataGridHyperlinkColumn：显示单击的链接
- DataGridComboBox：这种列最初和DataGridTextColumn类似，在编辑模式下，就编程可以下拉的ComboBox控件
- DataGridTemplateColumn：这种列允许显示值定义数据模板。
设置列的格式和样式
可使用设置TextBlock格式相同的方式设置DataGridTextColumn格式，但是无法设置多行显示，需要使用ElementStyle属性了设置，使用具有多行显示的TextBlock样式即可。
| 属性 | 说明 |
|---|---|
| ColumnHeaderStyle | 位于网格顶部的列题头的TextBlock |
| RowHeaderStyle | 行题头的TextBlock。一般用复选框做控件模板 |
| DragIndicatorStyle | 当用户正在将列题头拖动到新位置时用于列题头的TextBlock |
| RowStyle | 用于普通行的TextBlock（没有通过列的ElementStyle属性明确定制过的行） |
设置行的格式
DataGrid.LoadingRow事件：当每一行出现在屏幕上时，都会触发LoadingRow事件。当用户在网格中滚动是，会连续触发事件，所以不能在事件中进行耗时的处理。
显示行细节
DataGrid支持行细节（row details），一块可选的独立显示区域，在行的列值下面显示。
- 能够跨越DataGrid控件的整个宽度，并且不会切入到独立的列中，从而提供了更过可供使用的空间
- 可配置行细节区域，从而只为选择的行显示该区域，当不需要时，允许用户折叠额外的细节
可以通过设置属性DataGrid.RowDetailsTemplate属性，来定义行细节区域显示的内容。
可以通过设置DataGrid.0RowDetailsVisibilityMode属性来设置行细节区域的显示行为，默认是VisibleWhenSelected。
冻结列
冻结列位于DataGrid 控件的左边，甚至当向右滚动时，冻结列任然在左边。对于非常宽的网格，冻结列非常的有用，可以保持某些信息始终可见。通过属性FrozenColumnCount属性设置大于0的数。
冻结列必须总是位于网格的左侧，如果是1列，则就是最左边的那列，如果是2列，那就是最左边的两列。
选择
和普通的列表控件类似，DataGrid允许用户选择单个项，并且响应SelectionChanged事件。可以使用SelectedItem属性来找到当前选中的项。可以通过SelectionMode属性来设置单选还是多选。为了选择多行，用户必须按下Shift或者Ctrl键。通常我们可以在RowHeader中放置CheckBox来显示哪行被选中，也可以通过CheckBox直接选中某行或者多行。
排序
可以通过单击列题头来实现列的排序，可以通过设置SortMemberPath属性从绑定的数据对象中选择不同的属性来排序。可以通过CanUserSortColumns属性或者特定列的CanUserSort属性设置为false来禁止排序功能
编辑
一般情况下，DataGrid多数用于数据展示，编辑的话比较少用，可以通过属性DataGrid.IsReadOnly或者DataGridColumn.IsReadOnly属性设置为false来禁用编辑功能。
列举一个DataGrid的样式：
<Style x:Key="RowHeaderGripperStyle" TargetType="Thumb">
<Setter Property="Height" Value="8"/>
<Setter Property="Background" Value="Transparent"/>
<Setter Property="Cursor" Value="SizeNS"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="Thumb">
<Border Background="{TemplateBinding Background}" Padding="{TemplateBinding Padding}"/>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
<Style x:Key="DataGridCellStyle" TargetType="DataGridCell">
<Setter Property="FocusVisualStyle">
<Setter.Value>
<Style>
<Setter Property="Control.Template">
<Setter.Value>
<ControlTemplate>
<Rectangle Margin="2" Opacity=".6" SnapsToDevicePixels="true" Stroke="{DynamicResource SecondaryBorderBrush}" StrokeThickness="2" StrokeDashArray="1 1" RadiusX="4" RadiusY="4"/>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</Setter.Value>
</Setter>
<Setter Property="Background" Value="Transparent"/>
<Setter Property="BorderBrush" Value="Transparent"/>
<Setter Property="BorderThickness" Value="0"/>
<Setter Property="VerticalContentAlignment" Value="Center"/>
<Setter Property="HorizontalContentAlignment" Value="Left"/>
<Setter Property="Padding" Value="{StaticResource DefaultControlPadding}"/>
<Setter Property="hc:BorderElement.CornerRadius" Value="{StaticResource DefaultCornerRadius}"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="DataGridCell">
<Border Background="Transparent">
<Border Margin="0,0,4,0" CornerRadius="{Binding Path=(hc:BorderElement.CornerRadius),RelativeSource={RelativeSource TemplatedParent}}" Padding="{TemplateBinding Padding}" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" SnapsToDevicePixels="True">
<ContentPresenter HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" VerticalAlignment="{TemplateBinding VerticalContentAlignment}" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
</Border>
</Border>
</ControlTemplate>
</Setter.Value>
</Setter>
<Style.Triggers>
<MultiDataTrigger>
<MultiDataTrigger.Conditions>
<Condition Binding="{Binding IsSelected,RelativeSource={RelativeSource Self}}" Value="true"/>
<Condition Binding="{Binding SelectionUnit,RelativeSource={RelativeSource FindAncestor,AncestorType=DataGrid}}" Value="Cell"/>
</MultiDataTrigger.Conditions>
<Setter Property="Foreground" Value="{DynamicResource TextIconBrush}"/>
<Setter Property="Background" Value="{DynamicResource PrimaryBrush}"/>
</MultiDataTrigger>
<MultiDataTrigger>
<MultiDataTrigger.Conditions>
<Condition Binding="{Binding IsSelected,RelativeSource={RelativeSource Self}}" Value="true"/>
<Condition Binding="{Binding IsSelected,RelativeSource={RelativeSource AncestorType=DataGridRow}}" Value="False"/>
<Condition Binding="{Binding SelectionUnit,RelativeSource={RelativeSource FindAncestor,AncestorType=DataGrid}}" Value="CellOrRowHeader"/>
</MultiDataTrigger.Conditions>
<Setter Property="Foreground" Value="{DynamicResource TextIconBrush}"/>
<Setter Property="Background" Value="{DynamicResource PrimaryBrush}"/>
</MultiDataTrigger>
<MultiDataTrigger>
<MultiDataTrigger.Conditions>
<Condition Binding="{Binding IsSelected,RelativeSource={RelativeSource Self}}" Value="true"/>
<Condition Binding="{Binding IsSelected,RelativeSource={RelativeSource AncestorType=DataGridRow}}" Value="True"/>
<Condition Binding="{Binding SelectionUnit,RelativeSource={RelativeSource FindAncestor,AncestorType=DataGrid}}" Value="CellOrRowHeader"/>
</MultiDataTrigger.Conditions>
<Setter Property="Foreground" Value="{DynamicResource TextIconBrush}"/>
</MultiDataTrigger>
<MultiDataTrigger>
<MultiDataTrigger.Conditions>
<Condition Binding="{Binding IsSelected,RelativeSource={RelativeSource Self}}" Value="true"/>
<Condition Binding="{Binding SelectionUnit,RelativeSource={RelativeSource FindAncestor,AncestorType=DataGrid}}" Value="FullRow"/>
</MultiDataTrigger.Conditions>
<Setter Property="Foreground" Value="{DynamicResource TextIconBrush}"/>
</MultiDataTrigger>
<MultiTrigger>
<MultiTrigger.Conditions>
<Condition Property="IsSelected" Value="true"/>
<Condition Property="Selector.IsSelectionActive" Value="false"/>
</MultiTrigger.Conditions>
<Setter Property="Background" Value="{DynamicResource DarkDefaultBrush}"/>
<Setter Property="Foreground" Value="{DynamicResource PrimaryTextBrush}"/>
</MultiTrigger>
</Style.Triggers>
</Style>
<Style x:Key="DataGridRowStyle" TargetType="DataGridRow">
<Setter Property="Background" Value="{DynamicResource RegionBrush}"/>
<Setter Property="Foreground" Value="{DynamicResource PrimaryTextBrush}"/>
<Setter Property="SnapsToDevicePixels" Value="true"/>
<Setter Property="Margin" Value="0,0,0,4"/>
<Setter Property="Padding" Value="0,6"/>
<Setter Property="MinHeight" Value="44"/>
<Setter Property="Validation.ErrorTemplate" Value="{x:Null}"/>
<Setter Property="ValidationErrorTemplate">
<Setter.Value>
<ControlTemplate>
<TextBlock Foreground="Red" Margin="2,0,0,0" Text="!" VerticalAlignment="Center"/>
</ControlTemplate>
</Setter.Value>
</Setter>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="DataGridRow">
<SelectiveScrollingGrid>
<SelectiveScrollingGrid.ColumnDefinitions>
<ColumnDefinition Width="Auto"/>
<ColumnDefinition Width="*"/>
</SelectiveScrollingGrid.ColumnDefinitions>
<SelectiveScrollingGrid.RowDefinitions>
<RowDefinition Height="*"/>
<RowDefinition Height="Auto"/>
</SelectiveScrollingGrid.RowDefinitions>
<Border CornerRadius="4" Grid.ColumnSpan="2" x:Name="DGR_Border" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" SnapsToDevicePixels="True"/>
<DataGridCellsPresenter MinHeight="{TemplateBinding MinHeight}" VerticalContentAlignment="Center" Grid.Row="0" Grid.Column="1" ItemsPanel="{TemplateBinding ItemsPanel}" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
<DataGridDetailsPresenter Margin="0,6" Grid.Column="1" Grid.Row="1" SelectiveScrollingGrid.SelectiveScrollingOrientation="{Binding AreRowDetailsFrozen, ConverterParameter={x:Static SelectiveScrollingOrientation.Vertical}, Converter={x:Static DataGrid.RowDetailsScrollingConverter}, RelativeSource={RelativeSource AncestorType=DataGrid}}" Visibility="{TemplateBinding DetailsVisibility}"/>
<DataGridRowHeader Grid.Row="0" Grid.Column="0" SelectiveScrollingGrid.SelectiveScrollingOrientation="Vertical" Visibility="{Binding HeadersVisibility, ConverterParameter={x:Static DataGridHeadersVisibility.Row}, Converter={x:Static DataGrid.HeadersVisibilityConverter}, RelativeSource={RelativeSource AncestorType=DataGrid}}"/>
</SelectiveScrollingGrid>
</ControlTemplate>
</Setter.Value>
</Setter>
<Style.Triggers>
<Trigger Property="IsMouseOver" Value="true">
<Setter Property="Background" Value="{DynamicResource DarkDefaultBrush}"/>
</Trigger>
<Trigger Property="IsSelected" Value="True">
<Setter Property="Background" Value="{DynamicResource PrimaryBrush}"/>
<Setter Property="TextElement.Foreground" Value="{DynamicResource TextIconBrush}"/>
</Trigger>
<MultiTrigger>
<MultiTrigger.Conditions>
<Condition Property="IsSelected" Value="true"/>
<Condition Property="Selector.IsSelectionActive" Value="false"/>
</MultiTrigger.Conditions>
<Setter Property="Background" Value="{DynamicResource DarkDefaultBrush}"/>
<Setter Property="Foreground" Value="{DynamicResource PrimaryTextBrush}"/>
</MultiTrigger>
</Style.Triggers>
</Style>
<Style x:Key="ColumnHeaderGripperStyle" TargetType="Thumb">
<Setter Property="Width" Value="8"/>
<Setter Property="Background" Value="Transparent"/>
<Setter Property="Cursor" Value="SizeWE"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="Thumb">
<Border Background="{TemplateBinding Background}" Padding="{TemplateBinding Padding}"/>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
<Style x:Key="DataGridColumnHeaderStyle" TargetType="DataGridColumnHeader">
<Setter Property="VerticalContentAlignment" Value="Center"/>
<Setter Property="Foreground" Value="{DynamicResource PrimaryTextBrush}"/>
<Setter Property="Padding" Value="12,6,12,12"/>
<Setter Property="MinHeight" Value="44"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="DataGridColumnHeader">
<hc:SimplePanel>
<Border BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="Transparent" Padding="{TemplateBinding Padding}">
<Grid HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" VerticalAlignment="{TemplateBinding VerticalContentAlignment}">
<Grid.ColumnDefinitions>
<ColumnDefinition/>
<ColumnDefinition Width="Auto"/>
</Grid.ColumnDefinitions>
<ContentPresenter RecognizesAccessKey="True" VerticalAlignment="Center" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
<ToggleButton Grid.Column="1" VerticalAlignment="Center" Height="{x:Static system:Double.NaN}" Padding="4,0" Width="20" IsEnabled="False" Opacity="1" Foreground="{DynamicResource PrimaryBrush}" x:Name="ToggleButtonSortDirection" Style="{StaticResource ToggleButtonIconTransparent}" hc:IconSwitchElement.Geometry="{StaticResource DownGeometry}" hc:IconSwitchElement.GeometrySelected="{StaticResource UpGeometry}"/>
</Grid>
</Border>
<Thumb x:Name="PART_LeftHeaderGripper" HorizontalAlignment="Left" Style="{StaticResource ColumnHeaderGripperStyle}"/>
<Thumb x:Name="PART_RightHeaderGripper" HorizontalAlignment="Right" Style="{StaticResource ColumnHeaderGripperStyle}"/>
</hc:SimplePanel>
<ControlTemplate.Triggers>
<Trigger Property="SortDirection" Value="{x:Null}">
<Setter Property="Visibility" Value="Collapsed" TargetName="ToggleButtonSortDirection"/>
</Trigger>
<Trigger Property="SortDirection" Value="Ascending">
<Setter Property="IsChecked" Value="True" TargetName="ToggleButtonSortDirection"/>
</Trigger>
<Trigger Property="SortDirection" Value="Descending">
<Setter Property="IsChecked" Value="False" TargetName="ToggleButtonSortDirection"/>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
<Style.Triggers>
<Trigger Property="SortDirection" Value="Ascending">
<Setter Property="Foreground" Value="{DynamicResource PrimaryBrush}"/>
</Trigger>
<Trigger Property="SortDirection" Value="Descending">
<Setter Property="Foreground" Value="{DynamicResource PrimaryBrush}"/>
<Setter Property="Foreground" Value="{DynamicResource PrimaryBrush}"/>
</Trigger>
</Style.Triggers>
</Style>
<Style x:Key="DataGridRowHeaderStyle" TargetType="DataGridRowHeader">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="DataGridRowHeader">
<hc:SimplePanel HorizontalAlignment="Center">
<Border BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="Transparent" Padding="{TemplateBinding Padding}" >
<StackPanel Orientation="Horizontal">
<ContentPresenter RecognizesAccessKey="True" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" VerticalAlignment="Center"/>
</StackPanel>
</Border>
<Thumb x:Name="PART_TopHeaderGripper" Style="{StaticResource RowHeaderGripperStyle}" VerticalAlignment="Top"/>
<Thumb x:Name="PART_BottomHeaderGripper" Style="{StaticResource RowHeaderGripperStyle}" VerticalAlignment="Bottom"/>
</hc:SimplePanel>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
<Style x:Key="TextBlockComboBoxStyle" TargetType="ComboBox">
<Setter Property="Focusable" Value="True"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="ComboBox">
<TextBlock IsHitTestVisible="False" Text="{TemplateBinding Text}" TextTrimming="CharacterEllipsis"/>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
<Style x:Key="DataGridTextColumnStyle" TargetType="TextBlock">
<Setter Property="TextTrimming" Value="CharacterEllipsis"/>
</Style>
<Style TargetType="DataGrid">
<Setter Property="Background" Value="{DynamicResource SecondaryRegionBrush}"/>
<Setter Property="BorderBrush" Value="{DynamicResource BorderBrush}"/>
<Setter Property="BorderThickness" Value="0"/>
<Setter Property="GridLinesVisibility" Value="None"/>
<Setter Property="RowDetailsVisibilityMode" Value="VisibleWhenSelected"/>
<Setter Property="ScrollViewer.CanContentScroll" Value="true"/>
<Setter Property="ScrollViewer.PanningMode" Value="Both"/>
<Setter Property="Stylus.IsFlicksEnabled" Value="False"/>
<Setter Property="EnableRowVirtualization" Value="True"/>
<Setter Property="CanUserAddRows" Value="False"/>
<Setter Property="CanUserDeleteRows" Value="False"/>
<Setter Property="CanUserReorderColumns" Value="False"/>
<Setter Property="CanUserResizeRows" Value="False"/>
<Setter Property="ColumnHeaderStyle" Value="{StaticResource DataGridColumnHeaderStyle}"/>
<Setter Property="RowHeaderStyle" Value="{StaticResource DataGridRowHeaderStyle}"/>
<Setter Property="RowStyle" Value="{StaticResource DataGridRowStyle}"/>
<Setter Property="CellStyle" Value="{StaticResource DataGridCellStyle}"/>
<Setter Property="Padding" Value="6"/>
<Setter Property="ColumnWidth" Value="*"/>
<Setter Property="hc:DataGridAttach.TextColumnStyle" Value="{StaticResource DataGridTextColumnStyle}"/>
<Setter Property="hc:DataGridAttach.EditingTextColumnStyle" Value="{StaticResource TextBoxBaseStyle}"/>
<Setter Property="hc:DataGridAttach.ComboBoxColumnStyle" Value="{StaticResource TextBlockComboBoxStyle}"/>
<Setter Property="hc:DataGridAttach.EditingComboBoxColumnStyle" Value="{StaticResource ComboBoxBaseStyle}"/>
<Setter Property="hc:DataGridAttach.CheckBoxColumnStyle" Value="{StaticResource CheckBoxBaseStyle}"/>
<Setter Property="hc:DataGridAttach.EditingCheckBoxColumnStyle" Value="{StaticResource CheckBoxBaseStyle}"/>
<Setter Property="hc:DataGridAttach.ApplyDefaultStyle" Value="True"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="DataGrid">
<ControlTemplate.Resources>
<Storyboard x:Key="Storyboard1">
<DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="Opacity" Storyboard.TargetName="PART_VerticalScrollBar">
<EasingDoubleKeyFrame KeyTime="0:0:.2" Value=".8"/>
</DoubleAnimationUsingKeyFrames>
<DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="Opacity" Storyboard.TargetName="PART_HorizontalScrollBar">
<EasingDoubleKeyFrame KeyTime="0:0:.2" Value=".8"/>
</DoubleAnimationUsingKeyFrames>
</Storyboard>
<Storyboard x:Key="Storyboard2">
<DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="Opacity" Storyboard.TargetName="PART_VerticalScrollBar">
<EasingDoubleKeyFrame KeyTime="0:0:.2" Value="0"/>
</DoubleAnimationUsingKeyFrames>
<DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="Opacity" Storyboard.TargetName="PART_HorizontalScrollBar">
<EasingDoubleKeyFrame KeyTime="0:0:.2" Value="0"/>
</DoubleAnimationUsingKeyFrames>
</Storyboard>
</ControlTemplate.Resources>
<Border BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" Padding="{TemplateBinding Padding}" SnapsToDevicePixels="True">
<hc:ToggleBlock IsChecked="{Binding HasItems,RelativeSource={RelativeSource TemplatedParent},Mode=OneWay}" VerticalContentAlignment="Stretch" HorizontalContentAlignment="Stretch">
<hc:ToggleBlock.CheckedContent>
<ScrollViewer x:Name="DG_ScrollViewer" Focusable="false">
<ScrollViewer.Template>
<ControlTemplate TargetType="ScrollViewer">
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto"/>
<ColumnDefinition Width="*"/>
<ColumnDefinition Width="Auto"/>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="Auto"/>
<RowDefinition Height="*"/>
</Grid.RowDefinitions>
<Button Command="{x:Static DataGrid.SelectAllCommand}" Margin="0,0,0,6" Visibility="{Binding HeadersVisibility, ConverterParameter={x:Static DataGridHeadersVisibility.All}, Converter={x:Static DataGrid.HeadersVisibilityConverter}, RelativeSource={RelativeSource AncestorType=DataGrid}}" Width="{Binding CellsPanelHorizontalOffset, RelativeSource={RelativeSource AncestorType=DataGrid},Converter={StaticResource DoubleMinConverter}}" Style="{StaticResource ButtonIcon}" hc:IconElement.Geometry="{StaticResource AllGeometry}" Foreground="{DynamicResource PrimaryBrush}"/>
<DataGridColumnHeadersPresenter x:Name="PART_ColumnHeadersPresenter" Grid.ColumnSpan="2" Grid.Row="0" Grid.Column="1" Visibility="{Binding HeadersVisibility, ConverterParameter={x:Static DataGridHeadersVisibility.Column}, Converter={x:Static DataGrid.HeadersVisibilityConverter}, RelativeSource={RelativeSource AncestorType=DataGrid}}"/>
<ScrollContentPresenter x:Name="PART_ScrollContentPresenter" CanContentScroll="{TemplateBinding CanContentScroll}" Grid.ColumnSpan="3" Grid.Column="0" Grid.Row="1"/>
<ScrollBar Style="{StaticResource ScrollBarBaseStyle}" Opacity="0" x:Name="PART_VerticalScrollBar" Grid.Column="2" Maximum="{TemplateBinding ScrollableHeight}" Orientation="Vertical" Grid.Row="1" Visibility="{TemplateBinding ComputedVerticalScrollBarVisibility}" Value="{Binding VerticalOffset, Mode=OneWay, RelativeSource={RelativeSource TemplatedParent}}" ViewportSize="{TemplateBinding ViewportHeight}"/>
<ScrollBar Style="{StaticResource ScrollBarBaseStyle}" Opacity="0" x:Name="PART_HorizontalScrollBar" Grid.Column="1" Maximum="{TemplateBinding ScrollableWidth}" Orientation="Horizontal" VerticalAlignment="Bottom" Grid.Row="1" Visibility="{TemplateBinding ComputedHorizontalScrollBarVisibility}" Value="{Binding HorizontalOffset, Mode=OneWay, RelativeSource={RelativeSource TemplatedParent}}" ViewportSize="{TemplateBinding ViewportWidth}"/>
</Grid>
<ControlTemplate.Triggers>
<EventTrigger RoutedEvent="MouseEnter">
<BeginStoryboard Storyboard="{StaticResource Storyboard1}"/>
</EventTrigger>
<EventTrigger RoutedEvent="MouseLeave">
<BeginStoryboard Storyboard="{StaticResource Storyboard2}"/>
</EventTrigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</ScrollViewer.Template>
<ItemsPresenter SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
</ScrollViewer>
</hc:ToggleBlock.CheckedContent>
<hc:ToggleBlock.UnCheckedContent>
<hc:Empty />
</hc:ToggleBlock.UnCheckedContent>
</hc:ToggleBlock>
</Border>
</ControlTemplate>
</Setter.Value>
</Setter>
<Style.Triggers>
<MultiTrigger>
<MultiTrigger.Conditions>
<Condition Property="IsGrouping" Value="true"/>
<Condition Property="VirtualizingPanel.IsVirtualizingWhenGrouping" Value="false"/>
</MultiTrigger.Conditions>
<Setter Property="ScrollViewer.CanContentScroll" Value="false"/>
</MultiTrigger>
</Style.Triggers>
</Style>
