Question

我正在尝试构建一个非常简单的Contact浏览器。我有一个显示在ListBox控件中的Contact对象集合，它显示了Contact的FullName，右边我有一个名为BasicContactCard的customControl。这是显示ListBox的ContacWindow的XAML：

<DockPanel Width="auto" Height="auto" Margin="8 8 8 8">
    <Border Height="56" HorizontalAlignment="Stretch" VerticalAlignment="Top" BorderThickness="1" CornerRadius="8" DockPanel.Dock="Top" Background="Beige">
        <TextBox Height="32" Margin="23,5,135,5" Text="Search for contact here" FontStyle="Italic" Foreground="#FFAD9595" FontSize="14" BorderBrush="LightGray"/>
    </Border>
    <ListBox x:Name="contactList" DockPanel.Dock="Left" Width="192" Height="auto" Margin="5 4 0 8" />
    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition Height="1*" />
            <RowDefinition Height="0.125*" />
        </Grid.RowDefinitions>
        <local:BasicContactCard Margin="8 8 8 8" />
        <Button Grid.Row="1" x:Name="exit" Content="Exit" HorizontalAlignment="Right" Width="50" Height="25" Click="exit_Click" />
    </Grid>
</DockPanel>

这是CustomControl的XAML：

 <DockPanel Width="auto  " Height="auto" Margin="8,8,8,8">
    <Grid Width="auto" Height="auto" DockPanel.Dock="Top">
        <Grid.RowDefinitions>
            <RowDefinition Height="1*" />
            <RowDefinition Height="1*" />
            <RowDefinition Height="1*" />
            <RowDefinition Height="1*" />
        </Grid.RowDefinitions>
        <TextBlock x:Name="companyField" Grid.Row="0" Width="auto" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Margin="8,8,8,8" Text="Company"/>
        <TextBlock x:Name="contactField" Grid.Row="1" Width="auto" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Margin="8,8,8,8" Text="Contact"/>
        <TextBlock x:Name="phoneField" Grid.Row="2" Width="auto" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Margin="8,8,8,8" Text="Phone"/>
        <TextBlock x:Name="emailField" Grid.Row="3" Width="auto" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Margin="8,8,8,8" Text="email"/>
    </Grid>
</DockPanel>

我遇到的问题是如何将CustomControl的各个元素绑定到ListBox中SelectedItem后面的对象？

Answer 1

我认为使用DataTemplate作为ItemTemplates的{{1}}是更好的选择。无需使用CustomControl。 ListBox定义了列表中每个项目的外观。

Answer 2

您可以使用ListBox的SelectedItem属性作为您的DataContext（不是数据源，但如果您愿意，则是“类似”的用户控件）。

我们假设你有这个对象：

public class Contact
{
    public string Name { get; set; }
    public string LastName { get; set; }
    public string Phone { get; set; }
    public string Email { get; set; }
}

然后这是你的新XAML：

    <DockPanel Width="auto" Height="auto" Margin="8 8 8 8">
        <Border Height="56" HorizontalAlignment="Stretch" VerticalAlignment="Top" BorderThickness="1" CornerRadius="8" DockPanel.Dock="Top" Background="Beige">
            <TextBox Height="32" Margin="23,5,135,5" Text="Search for contact here" FontStyle="Italic" Foreground="#FFAD9595" FontSize="14" BorderBrush="LightGray"/>
        </Border>
        <ListBox x:Name="contactList" DockPanel.Dock="Left" Width="192" Height="auto" Margin="5 4 0 8" />
        <Grid>
            <Grid.RowDefinitions>
                <RowDefinition Height="1*" />
                <RowDefinition Height="0.125*" />
            </Grid.RowDefinitions>
            <local:BasicContactCard Margin="8 8 8 8" />
            <Button Grid.Row="1" x:Name="exit" Content="Exit" HorizontalAlignment="Right" Width="50" Height="25" Click="exit_Click" />
        </Grid>
    </DockPanel>

    <DockPanel Width="auto  " Height="auto" Margin="8,8,8,8" DataContext="{Binding ElementName='contactList', Path=SelectedItem}">
        <Grid Width="auto" Height="auto" DockPanel.Dock="Top">
            <Grid.RowDefinitions>
                <RowDefinition Height="1*" />
                <RowDefinition Height="1*" />
                <RowDefinition Height="1*" />
                <RowDefinition Height="1*" />
            </Grid.RowDefinitions>
            <TextBlock x:Name="companyField" Grid.Row="0" Width="auto" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Margin="8,8,8,8" Text="{Binding Company }"/>
            <TextBlock x:Name="contactField" Grid.Row="1" Width="auto" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Margin="8,8,8,8" Text="{Binding Contact }"/>
            <TextBlock x:Name="phoneField" Grid.Row="2" Width="auto" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Margin="8,8,8,8" Text="{Binding Phone }"/>
            <TextBlock x:Name="emailField" Grid.Row="3" Width="auto" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Margin="8,8,8,8" Text="{Binding Email }"/>
        </Grid>
    </DockPanel>

关键部分是：

    <DockPanel Width="auto  " Height="auto" Margin="8,8,8,8" DataContext="{Binding ElementName='contactList', Path=SelectedItem}">

当然，看看如何获取TextBlock的值：

Text =“{Binding Company}”/＆gt;

您正在从'contactList'ListBox的所选项目设置DockPanel的DataContext。

我没有对它进行测试，但我认为你对这两件事情有所了解。祝你好运。

Answer 3

嗯，我最终想到了它，它比我想象的要简单得多！卫生署！

基本上我将ContactWindow中Grid对象的DataContext设置为ListBox，以便该Grid内的任何对象都将继承DataContext。

<DockPanel Width="auto" Height="auto" Margin="8 8 8 8">
    <Border Height="56" HorizontalAlignment="Stretch" VerticalAlignment="Top" BorderThickness="1" CornerRadius="8" DockPanel.Dock="Top" Background="Beige">
        <TextBox Height="32" Margin="23,5,135,5" Text="Search for contact here" FontStyle="Italic" Foreground="#FFAD9595" FontSize="14" BorderBrush="LightGray"/>
    </Border>
    <ListBox x:Name="contactList" DockPanel.Dock="Left" Width="192" Height="auto" Margin="5 4 0 8" ItemsSource="{Binding}" DisplayMemberPath="FullName" />
    <Grid DataContext="{Binding ElementName=contactList, Path=SelectedItem}">
        <Grid.RowDefinitions>
            <RowDefinition Height="1*" />
            <RowDefinition Height="0.125*" />
        </Grid.RowDefinitions>
        <local:BasicContactCard Margin="8 8 8 8" />
        <Button Grid.Row="1" x:Name="exit" Content="Exit" HorizontalAlignment="Right" Width="50" Height="25" Click="exit_Click" />
    </Grid>
</DockPanel>

希望这可能会帮助其他人在同一条船上学习。

如何将WPF CustomControl绑定到ListBox

3 个答案: