[英]ListView how to change ItemsPanel in codebehind instead than in xaml
我在我的xaml中格式化了listView。 那行得通,但我必須添加一個模式復雜的邏輯,以便必須應用
<ListView.ItemsPanel>
<ItemsPanelTemplate>
<WrapPanel Orientation = "Horizontal" Width = "250" Background = "{x:Null}" VerticalAlignment = "Top"></WrapPanel>
</ItemsPanelTemplate>
</ListView.ItemsPanel>
所以現在我需要在后面的代碼中應用上面的代碼。
---編輯馬蒂諾·博丁(Martino Bordin)
請告訴我我誤會了什么:
1a。 我在列表視圖中定義了一種樣式:
<ListView x:Name="lvPPtab1" Grid.Row="2" FontSize="12" Background="{x:Null}" BorderBrush="Gainsboro" BorderThickness="5" Margin="10,12.2,10,8.4" VerticalAlignment="Stretch" PreviewMouseLeftButtonDown="ListBox_PreviewMouseLeftButtonDown" SelectionChanged="ListView_SelectionChanged">
<ListView.Resources>
<Style x:Key="ListViewStyle" TargetType="ListView">
<Setter Property="ItemsPanel">
<Setter.Value>
<ItemsPanelTemplate >
<WrapPanel Orientation="Horizontal" VerticalAlignment="Top"/>
</ItemsPanelTemplate>
</Setter.Value>
</Setter>
</Style>
</ListView.Resources>
<ListView.ItemContainerStyle>
<Style TargetType="ListViewItem">
<Style.Triggers>
<Trigger Property="IsSelected" Value="True">
<Setter Property="Background" Value="Blue"/>
</Trigger>
</Style.Triggers>
</Style>
</ListView.ItemContainerStyle>
</ListView>
2a。僅在需要時才在代碼中設置它:
<ListView x:Name="lvPPtab1" Grid.Row="2" FontSize="12" Background="{x:Null}" BorderBrush="Gainsboro" BorderThickness="5" Margin="10,12.2,10,8.4" VerticalAlignment="Stretch" PreviewMouseLeftButtonDown="ListBox_PreviewMouseLeftButtonDown" SelectionChanged="ListView_SelectionChanged">
<ListView.Resources>
<Style x:Key="ListViewStyle" TargetType="ListView">
<Setter Property="ItemsPanel">
<Setter.Value>
<ItemsPanelTemplate >
<WrapPanel Orientation="Horizontal" VerticalAlignment="Top"/>
</ItemsPanelTemplate>
</Setter.Value>
</Setter>
</Style>
</ListView.Resources>
<ListView.ItemContainerStyle>
<Style TargetType="ListViewItem">
<Style.Triggers>
<Trigger Property="IsSelected" Value="True">
<Setter Property="Background" Value="Blue"/>
</Trigger>
</Style.Triggers>
</Style>
</ListView.ItemContainerStyle>
</ListView>
lvPPtab1.Style = (Style)this.Resources["ListViewStyle"];
我所看到的只是...沒有listView空。
然后,我試圖堅持您所說的,所以我做到了:
1b。 在XAML中
<ListView x:Name="lvPPtab1" Grid.Row="2" FontSize="12" Background="{x:Null}" BorderBrush="Gainsboro" BorderThickness="5" Margin="10,12.2,10,8.4" VerticalAlignment="Stretch" PreviewMouseLeftButtonDown="ListBox_PreviewMouseLeftButtonDown" SelectionChanged="ListView_SelectionChanged">
<ListView.Resources>
<ItemsPanelTemplate x:Key="ListViewStyle" >
<WrapPanel Orientation="Horizontal" VerticalAlignment="Top"></WrapPanel>
</ItemsPanelTemplate>
</ListView.Resources>
<ListView.ItemContainerStyle>
<Style TargetType="ListViewItem">
<Style.Triggers>
<Trigger Property="IsSelected" Value="True">
<Setter Property="Background" Value="Blue"/>
</Trigger>
</Style.Triggers>
</Style>
</ListView.ItemContainerStyle>
</ListView>
在后面的代碼中:
lvPPtab1.ItemsPanel =(ItemsPanelTemplate)this.Resources [“ ListViewStyle”];
但是再也沒有! 全部空我在哪里錯了????
將模板放在資源字典中,為列表視圖指定x:Name ,然后可以在后面的代碼中訪問其屬性:
myListView.ItemsPanel
myListView.ItemsPanel = (ItemsPanelTemplate)this.Resources["MyListViewPanelTemplate"];
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.