[英]How to make WPF ListView horizontal with contained image stretched to fit the height?
我想要一個在水平ListView
中顯示帶有標簽圖像的畫廊。
每個列表項僅是帶有標簽的圖像:
<DataTemplate x:Key="ImageItemTemplate">
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="4*" />
<RowDefinition Height="*" />
</Grid.RowDefinitions>
<Image Grid.Row="0" Source="{Binding Image}" Stretch="UniformToFill" />
<Label Grid.Row="1" Content="{Binding Title}" />
</Grid>
</DataTemplate>
為了使ListView
處於水平狀態,我將ListView.ItemsPanel
替換為水平的StackPanel
:
<ListView.ItemsPanel>
<ItemsPanelTemplate>
<StackPanel Orientation="Horizontal" />
</ItemsPanelTemplate>
</ListView.ItemsPanel>
現在我得到這樣的東西:
但是我希望每個圖像都可以拉伸以占據ListView
的整個高度(減去標簽的足夠高度),同時保持寬高比,所以我替換了ListView.ItemContainerStyle
:
<ListView.ItemContainerStyle>
<Style TargetType="ListViewItem">
<Setter Property="HorizontalContentAlignment" Value="Stretch" />
<Setter Property="VerticalContentAlignment" Value="Stretch" />
</Style>
</ListView.ItemContainerStyle>
但是我不知道為什么每個項目的寬度都不會被拉伸而是被切割:
請幫忙,謝謝!
編輯:
整個xaml如下所示:
<UserControl x:Class="Test.ImageGalleryControl"
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"
mc:Ignorable="d">
<UserControl.Resources>
<DataTemplate x:Key="ImageItemTemplate">
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="4*" />
<RowDefinition Height="*" />
</Grid.RowDefinitions>
<Image Grid.Row="0" Source="{Binding Image}" Stretch="UniformToFill" />
<Label Grid.Row="1" Content="{Binding Title}" />
</Grid>
</DataTemplate>
</UserControl.Resources>
<Grid>
<ListView x:Name="MyImageList" ItemTemplate="{StaticResource ImageItemTemplate}">
<ListView.ItemContainerStyle>
<Style TargetType="ListViewItem">
<Setter Property="HorizontalContentAlignment" Value="Stretch" />
<Setter Property="VerticalContentAlignment" Value="Stretch" />
</Style>
</ListView.ItemContainerStyle>
<ListView.ItemsPanel>
<ItemsPanelTemplate>
<StackPanel Orientation="Horizontal" />
</ItemsPanelTemplate>
</ListView.ItemsPanel>
</ListView>
</Grid>
</UserControl>
嘗試這個
通過將ListView的高度設置為Itemtemplate(網格)。
<ListView x:Name="MyImageList">
<ListView.ItemContainerStyle>
<Style TargetType="ListViewItem">
<Setter Property="HorizontalContentAlignment" Value="Stretch" />
<Setter Property="VerticalContentAlignment" Value="Stretch" />
</Style>
</ListView.ItemContainerStyle>
<ListView.ItemsPanel>
<ItemsPanelTemplate>
<StackPanel Orientation="Horizontal" />
</ItemsPanelTemplate>
</ListView.ItemsPanel>
<ListView.ItemTemplate>
<DataTemplate>
<Grid Height="{Binding ElementName=MyImageList,Path=ActualHeight}">
<Grid.RowDefinitions>
<RowDefinition Height="4*" />
<RowDefinition Height="*" />
</Grid.RowDefinitions>
<Image Grid.Row="0" Source="Screenshot_3.png" Stretch="UniformToFill" />
<Label Grid.Row="1" Content="fghfgh" />
</Grid>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
更新資料
通過設置VerticalScrollBarVisibility =“ Hidden”或禁用並添加邊距可以解決此問題,但下面是正確的解決方案
此垂直滾動條是由於默認的邊距和Listview和ListviewItem默認樣式中的填充而來的。您可以通過編輯listview和listviewItem的樣式來獲得所需的結果
工作樣本(無垂直滾動條)
資源資源
<Window.Resources>
<Style TargetType="{x:Type ListView}">
<Setter Property="Background" Value="Transparent"/>
<Setter Property="BorderBrush" Value="#FFABADB3"/>
<Setter Property="BorderThickness" Value="0"/>
<Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.ControlTextBrushKey}}"/>
<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="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type ListView}">
<Border x:Name="Bd" BorderBrush="{TemplateBinding BorderBrush}" Height="{TemplateBinding Height}" BorderThickness="0" Background="{TemplateBinding Background}" Padding="0" SnapsToDevicePixels="True">
<ScrollViewer Focusable="False" Padding="0" >
<ItemsPresenter SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
</ScrollViewer>
</Border>
<ControlTemplate.Triggers>
<Trigger Property="IsEnabled" Value="False">
<Setter Property="Background" TargetName="Bd" Value="White"/>
<Setter Property="BorderBrush" TargetName="Bd" Value="#FFD9D9D9"/>
</Trigger>
<MultiTrigger>
<MultiTrigger.Conditions>
<Condition Property="IsGrouping" Value="True"/>
<Condition Property="VirtualizingPanel.IsVirtualizingWhenGrouping" Value="False"/>
</MultiTrigger.Conditions>
<Setter Property="ScrollViewer.CanContentScroll" Value="False"/>
</MultiTrigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
<Style TargetType="{x:Type ListViewItem}">
<Setter Property="SnapsToDevicePixels" Value="True"/>
<Setter Property="Padding" Value="0"/>
<Setter Property="HorizontalContentAlignment" Value="{Binding HorizontalContentAlignment, RelativeSource={RelativeSource FindAncestor, AncestorLevel=1, AncestorType={x:Type ItemsControl}}}"/>
<Setter Property="VerticalContentAlignment" Value="{Binding VerticalContentAlignment, RelativeSource={RelativeSource FindAncestor, AncestorLevel=1, AncestorType={x:Type ItemsControl}}}"/>
<Setter Property="Background" Value="Transparent"/>
<Setter Property="BorderBrush" Value="Transparent"/>
<Setter Property="BorderThickness" Value="0"/>
<Setter Property="FocusVisualStyle">
<Setter.Value>
<Style>
<Setter Property="Control.Template">
<Setter.Value>
<ControlTemplate>
<Rectangle Margin="2" SnapsToDevicePixels="True" Stroke="{DynamicResource {x:Static SystemColors.ControlTextBrushKey}}" StrokeThickness="1" StrokeDashArray="1 2"/>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</Setter.Value>
</Setter>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type ListViewItem}">
<Border x:Name="Bd" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="1" Background="{TemplateBinding Background}" Margin="0,-1,5,-1" SnapsToDevicePixels="True">
<ContentPresenter ContentTemplate="{TemplateBinding ContentTemplate}" Content="{TemplateBinding Content}" ContentStringFormat="{TemplateBinding ContentStringFormat}" HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" VerticalAlignment="{TemplateBinding VerticalContentAlignment}"/>
</Border>
<ControlTemplate.Triggers>
<MultiTrigger>
<MultiTrigger.Conditions>
<Condition Property="IsMouseOver" Value="True"/>
</MultiTrigger.Conditions>
<Setter Property="Background" TargetName="Bd" Value="#1F26A0DA"/>
<Setter Property="BorderBrush" TargetName="Bd" Value="#A826A0DA"/>
</MultiTrigger>
<MultiTrigger>
<MultiTrigger.Conditions>
<Condition Property="Selector.IsSelectionActive" Value="False"/>
<Condition Property="IsSelected" Value="True"/>
</MultiTrigger.Conditions>
<Setter Property="Background" TargetName="Bd" Value="#3DDADADA"/>
<Setter Property="BorderBrush" TargetName="Bd" Value="#FFDADADA"/>
</MultiTrigger>
<MultiTrigger>
<MultiTrigger.Conditions>
<Condition Property="Selector.IsSelectionActive" Value="True"/>
<Condition Property="IsSelected" Value="True"/>
</MultiTrigger.Conditions>
<Setter Property="Background" TargetName="Bd" Value="#3D26A0DA"/>
<Setter Property="BorderBrush" TargetName="Bd" Value="#FF26A0DA"/>
</MultiTrigger>
<Trigger Property="IsEnabled" Value="False">
<Setter Property="TextElement.Foreground" TargetName="Bd" Value="{DynamicResource {x:Static SystemColors.GrayTextBrushKey}}"/>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</Window.Resources>
窗口
<ListView x:Name="MyImageList">
<ListView.ItemsPanel>
<ItemsPanelTemplate>
<StackPanel Orientation="Horizontal"/>
</ItemsPanelTemplate>
</ListView.ItemsPanel>
<Grid Height="{Binding ElementName=MyImageList,Path=ActualHeight}">
<Grid.RowDefinitions>
<RowDefinition Height="4*" />
<RowDefinition Height="*" />
</Grid.RowDefinitions>
<Image Grid.Row="0" Source="Screenshot_3.png" Stretch="UniformToFill" />
<Label Grid.Row="1" Content="fghfgh"/>
</Grid>
<Grid Height="{Binding ElementName=MyImageList,Path=ActualHeight}">
<Grid.RowDefinitions>
<RowDefinition Height="4*" />
<RowDefinition Height="*" />
</Grid.RowDefinitions>
<Image Grid.Row="0" Source="Screenshot_3.png" Stretch="UniformToFill" />
<Label Grid.Row="1" Content="fghfgh"/>
</Grid>
</ListView>
現在嘗試更改Stretch屬性。 嗯,為什么不能添加代碼...
嘗試將Stretch =“ Uniform”設置為圖像
<Image Grid.Row="0" Source="{Binding Image}" Stretch="Uniform" />
<Image Grid.Row="0" Source="{Binding Image}" Stretch="Fill" />
但是,它不會保持圖像的縱橫比,無論圖像控件的大小如何,都可以使用Stretch =“ Uniform”來保持縱橫比。 您可以靜態指定圖像控件的高度,並使用Stretch =“ Uniform”來調整圖像控件的縱橫比和大小。
使用ItemsControl的簡單解決方案
<Grid>
<Grid.Resources>
<DataTemplate x:Key="ImageItemTemplate">
<Grid Height="{Binding ActualHeight,RelativeSource={RelativeSource FindAncestor,AncestorType=ItemsControl}}"
Margin="2,2,2,-25"
VerticalAlignment="Top">
<Grid.RowDefinitions>
<RowDefinition />
<RowDefinition Height="auto" />
</Grid.RowDefinitions>
<Image Grid.Row="0" Source="{Binding Image}" Stretch="UniformToFill" />
<Label Grid.Row="1" Content="{Binding Title}" />
</Grid>
</DataTemplate>
</Grid.Resources>
<ScrollViewer HorizontalScrollBarVisibility="Auto"
VerticalScrollBarVisibility="Hidden">
<ItemsControl x:Name="MyImageList"
ItemTemplate="{StaticResource ImageItemTemplate}">
<ItemsControl.ItemsPanel>
<ItemsPanelTemplate>
<StackPanel Orientation="Horizontal"/>
</ItemsPanelTemplate>
</ItemsControl.ItemsPanel>
</ItemsControl>
</ScrollViewer>
</Grid>
@pushpraj的“使用ItemsControl的簡單解決方案”在長時間搜索類似功能后確實對我有幫助。 我是WPF的新手,但仍嘗試使用ListView和ItemsControl模板的功能區,但未獲得所需的結果。 為了適應我的要求,做了一個小改動,將Image拉伸為均勻,Stretch =“ Uniform”。 感謝您的博客。
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