Question

我还处于学习WPF的早期阶段，并决定尝试编写一个相当简单的Contact Browser应用程序来掌握基础知识。为了增加复杂性，我正在使用来自其他应用程序的对象。

到目前为止，我已经能够成功地将ListBox控件绑定到Collection并显示Contact Names。在屏幕中间，我有一个带有CustomControl的StackPanel，它显示了Contact的更多细节。除了联系人的对象模型隐藏字段集合中的PhoneNUmber字段这一事实外，这一切都运行得非常好。

如何绑定/调用绑定对象集合的集合中的特定项？

以下是我的一些XAML，首先是主要的ContactWindow：

<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>

这是BasicContactCard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="{Binding Company}" FontWeight="Bold" FontSize="15" />
        <TextBlock x:Name="contactField" Grid.Row="1" Width="auto" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Margin="8,8,8,8" Text="{Binding FullName}" FontWeight="Bold" />
        <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 ValidEmailAddress}"/>
    </Grid>
</DockPanel>

BasicContactCard中除Phone之外的所有元素都是从Listbox绑定的Contact集合对象公开为可获取属性，但Phone驻留在可以在C＃中调用的Field对象集合中除外。

Contact c = contacList[i];
string val = c.ContactFields.Item("Phone",FieldNameType.Alias);

我希望所有这些都有意义！任何帮助或指向资源的人都会非常感激！

维夫

Answer 1

使用值转换器获取电话号码。

XAML：

<UserControl.Resources>    
    <TestApp:PhoneNumberConverter x:Key="PhoneNumberConverter" />
</UserControl.Resources>

<TextBlock Text="{Binding ., Converter=StaticResource PhoneNumberConverter}}"/>

代码背后：

public class PhoneNumberConverter : IValueConverter
{
    public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
    {
        Contact c = value as Contact;
        string phoneNr = c.ContactFields.Item("Phone", FieldNameType.Alias); 
        return phoneNr;
    }

    public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
    {
        throw new NotImplementedException();
    }
}

如何绑定到WPF中集合中的集合

1 个答案: