WPF组合框:文本框和下拉列表中的不同模板

Question

这是我的组合框.

    <ComboBox Height="45" HorizontalAlignment="Left" Margin="184,66,0,0" Name="ComboBox1" VerticalAlignment="Top" Width="216">
        <ComboBox.ItemTemplate>
            <DataTemplate>
                <StackPanel Orientation="Horizontal">
                    <Label Content="{Binding FullName}" Width="150" />
                    <Label Content="{Binding Title}" Width="100"/>
                    <Label Content="{Binding BranchName}" />
                </StackPanel>
            </DataTemplate>
        </ComboBox.ItemTemplate>
    </ComboBox>

如何更改它,以便只有FullName出现在组合框的文本框部分中,而所有三列仍然出现在下拉部分？

Answer 1

不幸的是,这SelectionBoxItemTemplate是一个只读属性,所以我们必须做更多的工作.通过执行ItemTemplate选择时项目的显示方式,您可以编辑ItemContainerStyle以提供ControlTemplate包含要显示的其他字段的项目.

<ComboBox Height="45" HorizontalAlignment="Left" Margin="184,66,0,0" Name="ComboBox1" VerticalAlignment="Top" Width="216">
    <ComboBox.ItemTemplate>
        <DataTemplate>
            <Label Content="{Binding FullName}" Width="150" />
        </DataTemplate>
    </ComboBox.ItemTemplate>
    <ComboBox.ItemContainerStyle>
        <Style TargetType="{x:Type ComboBoxItem}">
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="{x:Type ComboBoxItem}">
                        <Border x:Name="Bd"
                                BorderBrush="{TemplateBinding BorderBrush}"
                                BorderThickness="{TemplateBinding BorderThickness}"
                                Background="{TemplateBinding Background}">
                            <StackPanel Orientation="Horizontal">
                                <ContentPresenter HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" 
                                                  VerticalAlignment="{TemplateBinding VerticalContentAlignment}" />
                                <Label Content="{Binding Title}" Width="100"/>
                                <Label Content="{Binding BranchName}" />
                            </StackPanel>
                        </Border>
                        <ControlTemplate.Triggers>
                            <Trigger Property="IsHighlighted" Value="True">
                                <Setter TargetName="Bd" Property="Background" Value="{DynamicResource {x:Static SystemColors.HighlightBrushKey}}" />
                                <Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.HighlightTextBrushKey}}" />
                            </Trigger>
                            <Trigger Property="IsEnabled" Value="False">
                                <Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.GrayTextBrushKey}}" />
                            </Trigger>
                        </ControlTemplate.Triggers>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>
    </ComboBox.ItemContainerStyle>
</ComboBox>

对于ComboBoxItem模板,我只修改了默认模板,因此它应该是完全正常的.

Answer 2

如果ComboBox的IsEditable属性设置为True,则可以将ComboBox的"TextSearch.TextPath"属性设置为要显示的属性名称.所以在你的情况下:

<ComboBox IsEditable="True" TextSearch.TextPath="FullName" .../>