win10 UWP ListView
横向布局
默认 ListView 是垂直，那么如何让 ListView 水平？
可以使用下面代码
<ListView.ItemsPanel>
<ItemsPanelTemplate>
<StackPanel Orientation="Horizontal"></StackPanel>
</ItemsPanelTemplate>
</ListView.ItemsPanel>设置代码可以进行横向。
如果发现 UWP ListView 横向没有滚动条，可以使用 ScrollViewer 添加
<ListView ScrollViewer.VerticalScrollBarVisibility="Disabled"
ScrollViewer.HorizontalScrollBarVisibility="Auto"
ScrollViewer.HorizontalScrollMode="Enabled"
ScrollViewer.VerticalScrollMode="Disabled">使用从左到右放元素
实际上 ItemsPanelTemplate 可以放很多个类型，如 WrapGrid 和 ItemsWrapGrid ，下面我告诉大家如何做出这个效果
<ListView.ItemsPanel>
<ItemsPanelTemplate>
<ItemsWrapGrid Orientation="Horizontal"></ItemsWrapGrid>
</ItemsPanelTemplate>
</ListView.ItemsPanel> 这时可以设置元素的宽度，或者高度，这样可以做出下面的效果。
选中显示元素
有一些元素是要 Item 选中显示，不选中不显示
如何绑定到Item 的状态，是否被选中？
如果可以写在后台代码多的话，一个简单的方法是在SelectionChanged直接让 AddItems 的显示，其他不显示。
如何想要定义样式，可以参见：https://msdn.microsoft.com/en-us/library/windows/apps/mt299136.aspx
首先把代码复制下来，然后修改 Selected 的动画，添加自己元素在ControlTemplate，看起来就是
<ControlTemplate TargetType="ListViewItem">
<Grid>
<ContentPresenter ></ContentPresenter>
<Button x:Name="b" Opacity="0" HorizontalAlignment="Center" Content="显示"></Button>
<VisualStateManager.VisualStateGroups>
<VisualStateGroup x:Name="SelectionStates">
<!--<VisualState x:Name="Unselecting">
<Storyboard BeginTime="0:0:0">
<DoubleAnimation Storyboard.TargetName="b"
Storyboard.TargetProperty="Opacity"
Duration="0:0:0.1"
To="0" />
</Storyboard>
</VisualState>-->
<VisualState x:Name="Unselected">
<Storyboard BeginTime="0:0:0">
<DoubleAnimation Storyboard.TargetName="b"
Storyboard.TargetProperty="Opacity"
Duration="0"
To="0" />
</Storyboard>
</VisualState>
<VisualState x:Name="Selected">
<Storyboard BeginTime="0:0:0">
<DoubleAnimation Storyboard.TargetName="b"
Storyboard.TargetProperty="Opacity"
Duration="0"
To="1" />
</Storyboard>
</VisualState>
</VisualStateGroup>
</VisualStateManager.VisualStateGroups>
</Grid>
</ControlTemplate>上面代码的元素 b 就是加上去的元素，参见他的做法，可以看到这个方法可以在 选择时显示，但是我无法在不选择时隐藏，原因没找到。
根据上面代码，可以做很小修改，在选择改变时，手动使用变化。
首先把 Selected 改为 CustomSelected 现在的代码换为
<ControlTemplate TargetType="ListViewItem">
<Grid>
<ContentPresenter ></ContentPresenter>
<Button x:Name="b" Opacity="0" HorizontalAlignment="Center" Content="显示"></Button>
<VisualStateManager.VisualStateGroups>
<VisualStateGroup x:Name="SelectionStates">
<!--<VisualState x:Name="Unselecting">
<Storyboard BeginTime="0:0:0">
<DoubleAnimation Storyboard.TargetName="b"
Storyboard.TargetProperty="Opacity"
Duration="0:0:0.1"
To="0" />
</Storyboard>
</VisualState>-->
<VisualState x:Name="CustomUnselected">
<Storyboard BeginTime="0:0:0">
<DoubleAnimation Storyboard.TargetName="b"
Storyboard.TargetProperty="Opacity"
Duration="0"
To="0" />
</Storyboard>
</VisualState>
<VisualState x:Name="CustomSelected">
<Storyboard BeginTime="0:0:0">
<DoubleAnimation Storyboard.TargetName="b"
Storyboard.TargetProperty="Opacity"
Duration="0"
To="1" />
</Storyboard>
</VisualState>
</VisualStateGroup>
</VisualStateManager.VisualStateGroups>
</Grid>
</ControlTemplate>在列表的选择改变时，需要在后台代码写
var listView = (sender as ListView);
if (listView == null)
{
return;
}
if (e.AddedItems != null)
{
foreach (var item in e.AddedItems)
{
Debug.WriteLine(item);
ListViewItem litem = listView.ContainerFromItem(item) as ListViewItem;
if (litem != null)
{
VisualStateManager.GoToState(litem, "CustomSelected", true);
}
}
}
if (e.RemovedItems != null)
{
foreach (var item in e.RemovedItems)
{
Debug.WriteLine(item);
ListViewItem litem = listView.ContainerFromItem(item) as ListViewItem;
if (litem != null)
{
VisualStateManager.GoToState(litem, "CustomUnselected", true);
}
}
}这个方法是比较差的，但是可以使用
参见：http://stackoverflow.com/questions/43461819/the-listviewitem-style-cant-trigger-unselected
ListViewItem 默认
<Setter Property="Template"> <Setter.Value> <ControlTemplate TargetType="ListViewItem"> <ListViewItemPresenter ContentTransitions="{TemplateBinding ContentTransitions}" SelectionCheckMarkVisualEnabled="True" CheckBrush="{ThemeResource SystemControlForegroundBaseMediumHighBrush}" CheckBoxBrush="{ThemeResource SystemControlForegroundBaseMediumHighBrush}" DragBackground="{ThemeResource ListViewItemDragBackgroundThemeBrush}" DragForeground="{ThemeResource ListViewItemDragForegroundThemeBrush}" FocusBorderBrush="{ThemeResource SystemControlForegroundAltHighBrush}" FocusSecondaryBorderBrush="{ThemeResource SystemControlForegroundBaseHighBrush}" PlaceholderBackground="{ThemeResource ListViewItemPlaceholderBackgroundThemeBrush}" PointerOverBackground="{ThemeResource SystemControlHighlightListLowBrush}" PointerOverForeground="{ThemeResource SystemControlHighlightAltBaseHighBrush}" SelectedBackground="{ThemeResource SystemControlHighlightListAccentLowBrush}" SelectedForeground="{ThemeResource SystemControlHighlightAltBaseHighBrush}" SelectedPointerOverBackground="{ThemeResource SystemControlHighlightListAccentMediumBrush}" PressedBackground="{ThemeResource SystemControlHighlightListMediumBrush}" SelectedPressedBackground="{ThemeResource SystemControlHighlightListAccentHighBrush}" DisabledOpacity="{ThemeResource ListViewItemDisabledThemeOpacity}" DragOpacity="{ThemeResource ListViewItemDragThemeOpacity}" ReorderHintOffset="{ThemeResource ListViewItemReorderHintThemeOffset}" HorizontalContentAlignment="{TemplateBinding HorizontalContentAlignment}" VerticalContentAlignment="{TemplateBinding VerticalContentAlignment}" ContentMargin="{TemplateBinding Padding}" CheckMode="Inline"/> </ControlTemplate> </Setter.Value> </Setter>
WPF ListView 宽度
使用下面的代码可以让 WPF 的 ListView 的 Item 宽度和他一样
HorizontalContentAlignment="Stretch"或
<ListBox.ItemContainerStyle>
<Style TargetType="ListBoxItem">
<Setter Property="HorizontalContentAlignment" Value="Stretch"></Setter>
</Style>
</ListBox.ItemContainerStyle> 腾讯云开发者
