WPF ComboBox 多列

Question

我只是想知道有没有可以包含多列的wpf组合框控件？

如果没有，我需要使用什么 XAML 来实现这一点？

如果可能的话，我只是在寻找一个基本的两列组合框，

谢谢

Answer 1

Multiple Column Combobox请参考这些链接，通过编辑combox和comboboxitem默认模板/样式来实现。

1)Link1

2)Link2

Xaml 代码：请查看 ComboboxItem 样式中注释的 Trigger IsHighlighted

 <Grid>
    <ComboBox Height="30" Margin="5" ItemsSource="{Binding}" HorizontalContentAlignment="Stretch">
        <ComboBox.ItemTemplate>
            <DataTemplate>
                <TextBlock Margin="2" Text="{Binding Name}"/>
            </DataTemplate>
        </ComboBox.ItemTemplate>
        <ComboBox.ItemContainerStyle>
            <Style TargetType="{x:Type ComboBoxItem}">                
                <Setter Property="Template">
                    <Setter.Value>
                        <ControlTemplate>
                            <Grid x:Name="gd" TextElement.Foreground="Black">
                                <Grid.ColumnDefinitions>
                                    <ColumnDefinition/>
                                    <ColumnDefinition/>
                                    <ColumnDefinition/>
                                </Grid.ColumnDefinitions>
                                <TextBlock Margin="5" Grid.Column="0" Text="{Binding Name}"/>
                                <TextBlock Margin="5" Grid.Column="1" Text="{Binding State}"/>
                                <TextBlock Margin="5" Grid.Column="2" Text="{Binding Population}"/>
                            </Grid>
                            <ControlTemplate.Triggers>
                                <Trigger Property="ComboBoxItem.IsSelected" Value="True">
                                    <Setter TargetName="gd"  Property="Background" Value="Gray"></Setter>
                                    <Setter TargetName="gd"  Property="TextElement.Foreground" Value="White"></Setter>
                                </Trigger>
                                <Trigger Property="ComboBoxItem.IsMouseOver" Value="True">
                                    <Setter TargetName="gd"  Property="Background" Value="Blue"></Setter>
                                    <Setter TargetName="gd"  Property="TextElement.Foreground" Value="White"></Setter>
                                </Trigger>

                                <!--IsHighlighted and IsMouseOver is showing same effect but IsHighlighted is used for showing logical focus( for understanding check using tab key)-->

                                <!--<Trigger Property="ComboBoxItem.IsHighlighted" Value="True">
                                    <Setter TargetName="gd"  Property="Background" Value="Yellow"></Setter>
                                    <Setter TargetName="gd"  Property="TextElement.Foreground" Value="Black"></Setter>
                                </Trigger>-->
                            </ControlTemplate.Triggers>
                        </ControlTemplate>
                    </Setter.Value>
                </Setter>
            </Style>
        </ComboBox.ItemContainerStyle>
    </ComboBox>
</Grid>

c#代码

public partial class MainWindow : Window

{

    private ObservableCollection<City> cities = new ObservableCollection<City>();

    public MainWindow()
    {
        InitializeComponent();
        cities.Add(new City() { Name = "Mumbai", State = "Maharashtra", Population = 3000000 });
        cities.Add(new City() { Name = "Pune", State = "Maharashtra", Population = 7000000 });
        cities.Add(new City() { Name = "Nashik", State = "Maharashtra", Population = 65000 });
        cities.Add(new City() { Name = "Aurangabad", State = "Maharashtra", Population = 5000000 });
        DataContext = cities;
    }
}

class City
{
    public string State { get; set; }
    public string Name { get; set; }
    public int Population { get; set; }
}

输出

Answer 2

因为我发现，Heena，您的 Xaml 不提供要突出显示的选定下拉项目，所以我将您的代码修改如下：

Xaml

<ComboBox Name="cbCities" Height="30" Margin="5" HorizontalContentAlignment="Left" HorizontalAlignment="Stretch" ItemsSource="{Binding}" >
    <ComboBox.ItemTemplate>
        <DataTemplate>
            <StackPanel Orientation="Horizontal">
                <TextBlock Margin="2" Text="{Binding Name}"/>
                <TextBlock Margin="2" Text="{Binding State}"/>
            </StackPanel>
        </DataTemplate>
    </ComboBox.ItemTemplate>
    <ComboBox.ItemContainerStyle>
        <Style TargetType="{x:Type ComboBoxItem}">
            <Setter Property="SnapsToDevicePixels" Value="True"/>
            <Setter Property="OverridesDefaultStyle" Value="True"/>
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="{x:Type ComboBoxItem}">
                        <Border Name="templateBorder" Padding="2" SnapsToDevicePixels="true">
                            <ContentPresenter>
                                <ContentPresenter.Content>
                                    <Grid>
                                        <Grid.ColumnDefinitions>
                                            <ColumnDefinition/>
                                            <ColumnDefinition/>
                                            <ColumnDefinition/>
                                        </Grid.ColumnDefinitions>
                                        <TextBlock Margin="5" Grid.Column="0" Text="{Binding Name}"/>
                                        <TextBlock Margin="5" Grid.Column="1" Text="{Binding State}"/>
                                        <TextBlock Margin="5" Grid.Column="2" Text="{Binding Population}"/>
                                    </Grid>
                                </ContentPresenter.Content>
                            </ContentPresenter>
                        </Border>
                        <ControlTemplate.Triggers>
                            <Trigger Property="IsHighlighted" Value="True">
                                <Setter Property="Foreground" Value="{x:Static SystemColors.HighlightTextBrush}"/>
                                <Setter TargetName="templateBorder" Property="Background" Value="{x:Static SystemColors.HighlightBrush}"/>
                            </Trigger>
                        </ControlTemplate.Triggers>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>
    </ComboBox.ItemContainerStyle>
</ComboBox>  

C#

private void Window_Loaded(object sender, RoutedEventArgs e)
{
    cities.Add(new City() { Name = "Boston", State = "MA", Population = 3000000 });
    cities.Add(new City() { Name = "Los Angeles", State = "CA", Population = 7000000 });
    cities.Add(new City() { Name = "Frederick", State = "MD", Population = 65000 });
    cities.Add(new City() { Name = "Houston", State = "TX", Population = 5000000 });
    cbCities.DataContext = cities;
}

class City
{
    public string State { get; set; }
    public string Name { get; set; }
    public int Population { get; set; }
}  

输出

Answer 3

我知道我迟到了，但这是您以一种简化的方式执行此操作的方式，在DataTemplate 标签之后，您可以根据您希望布局的外观放置任何内容。

  <ComboBox.ItemTemplate>
                        <DataTemplate >
                            <StackPanel Orientation="Horizontal">
                                <TextBlock Foreground="{StaticResource ForegroundMainBrush}"
                                           Margin="5 0"
                                           FontFamily="{StaticResource LatoBold}"
                                           VerticalAlignment="Center">
                                    <Run  Text="Code :" />
                                    <Run Text="{Binding ActivityCode,Mode=OneWay}" />
                                </TextBlock>
                                <TextBlock Foreground="{StaticResource ForegroundDarkBrush}"
                                           Margin="5 0"
                                           Text="|"
                                           FontFamily="{StaticResource LatoBold}"
                                           VerticalAlignment="Center" />
                                <TextBlock Foreground="{StaticResource ForegroundMainBrush}"
                                           Margin="5 0"
                                           FontFamily="{StaticResource LatoBold}"
                                           VerticalAlignment="Center">
                                    <Run  Text="Rate :" />
                                    <Run Text="{Binding Rate,Mode=OneWay}" />
                                </TextBlock>
                            </StackPanel>
                        </DataTemplate>
                    </ComboBox.ItemTemplate>

结果

Sample Result

或在您的 DataModel 中使用只读属性，如下面的代码所示，并将您的组合框 DisplayMemberPath 设置为 DisplayMemberPath="CodeRate"

 public string ActivityCode { get; set; }
 public string Rate { get; set; }
 public string CodeRate => string.Format("Code: {0} | Rate: 
 {1}",ActivityCode,Rate);