0

我已经创建了自己的组合框样式以及样式组合框项目。下拉列表需要显示一些带有按钮的项目,而其他没有我的项目的项目是动态创建的,如下所示:

            ComboBoxItem typeItem = new ComboBoxItem();
            typeItem.Content = "Test";
            typeItem.Tag = i;
            MyCombobox.Items.Add(typeItem);

我的问题是如何将这种样式应用于某些项目而不是其他项目,我的两个组合框项目如下?

<Style x:Key="{x:Type ComboBoxItem}" TargetType="{x:Type ComboBoxItem}">
    <Setter Property="HorizontalContentAlignment" Value="Left" />
    <Setter Property="VerticalContentAlignment" Value="Top" />
    <Setter Property="MinHeight" Value="{DynamicResource ResourceKey=MinimumIteractSizeDips}" />
    <Setter Property="MinWidth" Value="{DynamicResource ResourceKey=MinimumIteractSizeDips}" />
    <Setter Property="Foreground" Value="Black"/>
</Style>

<Style x:Key="MyComboBoxItem" TargetType="{x:Type ComboBoxItem}">
    <Setter Property="HorizontalContentAlignment" Value="Left" />
    <Setter Property="VerticalContentAlignment" Value="Top" />
    <Setter Property="MinHeight" Value="{DynamicResource ResourceKey=MinimumIteractSizeDips}" />
    <Setter Property="MinWidth" Value="{DynamicResource ResourceKey=MinimumIteractSizeDips}" />
    <Setter Property="Foreground" Value="Black"/>
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="ComboBoxItem">
                <Grid>
                    <Label Content="{TemplateBinding Content}" Foreground="Black" Background="White" Height="26" HorizontalAlignment="Left" VerticalAlignment="Center" Grid.Row="0" Grid.Column="0"/>
                    <Button Grid.Column="2" Grid.Row="0" Content="Settings" Height="23" HorizontalAlignment="Left" Margin="2" Name="PositionSettings" VerticalAlignment="Center" Width="57"/>
                </Grid>
            </ControlTemplate>
        </Setter.Value>
    </Setter>
</Style>
4

1 回答 1

0

检查StyleSelector类。

public class MyStyleSelector : StyleSelector
{
     public override Style SelectStyle(object item, DependencyObject container)
    {
        var element = container as FrameworkElement;
        var myVm = item as MyViewModel;

        if(myVm.EditMode)
            return element.FindResource("TemplateWithButtons") as DataTemplate
        return element.FindResource("TemplateNormal") as DataTemplate

    }
}

在 xaml 中,为您的选择器定义一个资源

<MyStyleSelector x:Key="myStyleSelector"/>

并将其应用于您的组合框。

<ComboBox StyleSelector="{StaticResource myStyleSelector}"/>

顺便提一句。x:Key 与相同类型TargetType是多余的。

最后说明:您不应该为此覆盖样式。您想要的是 DataTemplate 和 DataTemplate 选择器。此外,您不应该将 Content(type object) 绑定到标签文本(type string),ContentPresenter 是这里的方法。

于 2012-07-24T09:14:57.653 回答