Question

我只是试图理解项目名称的概念。为此,我建立了小型样本解决方案。

我有一部名为“MyListView”的用户法典,其内容如下。

MyListView.xaml:

<UserControl x:Class="WpfApplication2.MyListView"
         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" 
         d:DesignHeight="300" d:DesignWidth="300">
<UserControl.Resources>
    <Style  TargetType="ListViewItem">
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="ListViewItem">
                    <Grid>
                        <Grid.RowDefinitions>
                            <RowDefinition Height="Auto" />
                            <RowDefinition Height="Auto" />
                        </Grid.RowDefinitions>
                        <Border BorderBrush="Black" BorderThickness="1" Margin="0" Padding="0" Width="100" Background="Gray">
                            <TextBlock Text="Text" HorizontalAlignment="Center"  />
                        </Border>
                    </Grid>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>
</UserControl.Resources>

<ListView ItemsSource="{Binding Path=TreeItemChildren}">
    <ListView.ItemsPanel>
        <ItemsPanelTemplate>
            <StackPanel Orientation="Horizontal" HorizontalAlignment="Stretch">

            </StackPanel>
        </ItemsPanelTemplate>
    </ListView.ItemsPanel>
</ListView>
</UserControl>

In MyListView.cs 我补充说,为了对数据进行约束,应当表现出一种依赖性:

public partial class MyListView : UserControl
{
    public MyListView()
    {
        this.TreeItemChildren = new ObservableCollection<string>();
        this.TreeItemChildren.Add("Text0");
        this.TreeItemChildren.Add("Text1");
        this.TreeItemChildren.Add("Text2");

        InitializeComponent();
    }

    public ObservableCollection<string> TreeItemChildren
    {
        get { return (ObservableCollection<string>)GetValue(TreeItemChildrenProperty); }
        set { SetValue(TreeItemChildrenProperty, value); }
    }

    // Using a DependencyProperty as the backing store for TreeItemChildren.  This enables animation, styling, binding, etc...
    public static readonly DependencyProperty TreeItemChildrenProperty =
        DependencyProperty.Register("TreeItemChildren", typeof(ObservableCollection<string>), typeof(MainWindow), new UIPropertyMetadata(null));
}

当我试图在我的主妇dow中使用这一用户配置时,没有数据可以显示。原因何在?

Answer 1

您没有任何<代码>ListBoxItem 载于控制模板中的财产,Content没有出现。

Usually you would replace this:

<TextBlock Text="Text" HorizontalAlignment="Center"  />

注

<ContentPresenter HorizontalAlignment="Center"/>

(如果模板控制是<条码> <代码>Content Presenter obligs to Content related nature autoly

此外,<代码> ListView.ItemsSource obligs to a property on the DataContext (tn t set and should not be set) 由于它干扰了对控制情况的约束力,将它改为somehow针对UserControl(例如,使用>>>>>>>:ElementName 或

(应为<代码>造成的具有约束力的错误。) 项目Source binding, Learning

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