我不太熟悉 C# UWP 中的 VisualStateManager
,我需要你的帮助来隐藏或显示我的 ListViewItem
中的堆栈面板。
<ListView.ItemTemplate>
<DataTemplate>
<Grid Width="500">
<Grid.RowDefinitions>
<RowDefinition />
<RowDefinition />
</Grid.RowDefinitions>
<StackPanel Orientation="Horizontal">
<Image Height="45" Width="45" Margin="0,8,0,8" Source="../../Assets/ViewBox.png" Stretch="UniformToFill"/>
<StackPanel Orientation="Vertical" VerticalAlignment="Top" Margin="8,8,0,0">
<TextBlock Text="Test" Style="{StaticResource BaseTextBlockStyle}" />
<TextBlock Text="test1" Margin="0,4,8,0" Style="{StaticResource BodyTextBlockStyle}" />
</StackPanel>
</StackPanel>
<StackPanel x:Name="EDITOR_PANEL" Grid.Row="1" Orientation="Horizontal" Visibility="Collapsed">
<Button Content="Edit" />
<Button Content="Delete" />
</StackPanel>
<VisualStateManager.VisualStateGroups>
<VisualStateGroup x:Name="CommonStates">
<VisualState x:Name="Normal">
<Storyboard>
<PointerUpThemeAnimation Storyboard.TargetName="ContentPresenter" />
</Storyboard>
</VisualState>
<VisualState x:Name="Selected">
<VisualState.Setters>
<Setter Target="EDITOR_PANEL.Visibility" Value="Visible"></Setter>
</VisualState.Setters>
</VisualState>
</VisualStateGroup>
</VisualStateManager.VisualStateGroups>
</Grid>
</DataTemplate>
</ListView.ItemTemplate>
我想做的是这样的:
当我选择我的 ListView 中的一个项目时,它会显示带有两个按钮的 EDITOR_PANEL
,如果我选择另一个,它会折叠前一个选择的项目,而当前的显示 EDITOR_PANEL
等等。
你有什么想法吗?
最佳答案
一个解决方案是创建一个 UserControl,其中包含您要在 ListViewItem
中公开的所有控件。
然后,从代码隐藏,您可以更新 ListView
事件 SelectionChanged
上的 VisualState
。
这是一个工作示例:
UserControl
View :
<UserControl
x:Class="App4.EditablePanel"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="using:App4"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
mc:Ignorable="d"
d:DesignHeight="300"
d:DesignWidth="400">
<Grid Width="500">
<Grid.RowDefinitions>
<RowDefinition />
<RowDefinition />
</Grid.RowDefinitions>
<StackPanel Orientation="Horizontal">
<Image Height="45" Width="45" Margin="0,8,0,8" Source="../../Assets/ViewBox.png" Stretch="UniformToFill"/>
<StackPanel Orientation="Vertical" VerticalAlignment="Top" Margin="8,8,0,0">
<TextBlock Text="{Binding Title}" Style="{StaticResource BaseTextBlockStyle}" />
<TextBlock Text="{Binding Headline}" Margin="0,4,8,0" Style="{StaticResource BodyTextBlockStyle}" />
</StackPanel>
</StackPanel>
<StackPanel x:Name="EDITOR_PANEL" Grid.Row="1" Orientation="Horizontal" Visibility="Collapsed">
<Button Content="Edit" />
<Button Content="Delete" />
</StackPanel>
<VisualStateManager.VisualStateGroups>
<VisualStateGroup x:Name="CommonStates">
<VisualState x:Name="Normal">
</VisualState>
<VisualState x:Name="Selected">
<VisualState.Setters>
<Setter Target="EDITOR_PANEL.Visibility" Value="Visible"></Setter>
</VisualState.Setters>
</VisualState>
</VisualStateGroup>
</VisualStateManager.VisualStateGroups>
</Grid>
</UserControl>
UserControl
代码隐藏:
public sealed partial class EditablePanel : UserControl
{
public EditablePanel()
{
this.InitializeComponent();
}
public void SetInEditMode()
{
VisualStateManager.GoToState(this, "Selected", true);
}
public void SetInViewMode()
{
VisualStateManager.GoToState(this, "Normal", true);
}
}
MainPage
View :
<Page
x:Class="App4.MainPage"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="using:App4"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
mc:Ignorable="d"
DataContext="{Binding RelativeSource={RelativeSource Self}}">
<ListView ItemsSource="{Binding Items}" SelectionChanged="ListView_SelectionChanged">
<ListView.ItemTemplate>
<DataTemplate>
<local:EditablePanel></local:EditablePanel>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
</Page>
MainPage
背后的代码:
public sealed partial class MainPage : Page
{
private List<Item> items;
public MainPage()
{
items = new List<Item>()
{
new Item() { Title = "3D Build", Headline="MS Corp" },
new Item() { Title = "7Zip", Headline="Igor Pavlov" },
new Item() { Title = "Photoshop", Headline = "Adobe"}
};
this.InitializeComponent();
}
public List<Item> Items { get { return items; } }
private void ListView_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
var lv = sender as ListView;
if (e.RemovedItems.Count > 0)
{
foreach (var item in e.RemovedItems)
{
var container = lv.ContainerFromItem(item) as ListViewItem;
var panel = container.ContentTemplateRoot as EditablePanel;
panel.SetInViewMode();
}
}
if (e.AddedItems.Count > 0)
{
foreach (var item in e.AddedItems)
{
var container = lv.ContainerFromItem(item) as ListViewItem;
var panel = container.ContentTemplateRoot as EditablePanel;
panel.SetInEditMode();
}
}
}
}
public class Item
{
public string Title { get; set; }
public string Headline { get; set; }
}
关于c# - 使用 VisualStateManager 隐藏或显示 ListViewItem 的堆栈面板,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/37874238/