WPF ComboBox 多列
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WPF ComboBox Multiple Columns
提问by user3428422
I am just wondering if there is a wpf combobox control that can contain multiple columns?
我只是想知道是否有可以包含多列的 wpf 组合框控件？
And if not, what XAML I need to use to achieve this?
如果没有，我需要使用什么 XAML 来实现这一目标？
I am just looking for a basic two column combobox if is possible,
如果可能的话，我只是在寻找一个基本的两列组合框，
Thanks
谢谢
回答by Heena Patil
Please Refer these links for Multiple Column Comboboxwhich is implemented by editing combox and comboboxitem Default template/style.
请参阅通过编辑组合框和组合框项目默认模板/样式实现的多列组合框的这些链接。
1)Link1
2)Link2
1）链接1
2）链路2
Xaml code: Please take a look at commented Trigger IsHighlightedin ComboboxItem style
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# code
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; }
}
Output
输出
回答by Pollitzer
Because I found, Heena, that your Xaml does not provide selected dropped down items to be highlighted I modified your code as follows:
因为我发现，Heena，您的 Xaml 没有提供要突出显示的选定下拉项，所以我修改了您的代码，如下所示：
Xaml
xml
<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#
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; }
}
Output
输出
