Question

我有以下问题。

ListView中的背景颜色设置为LightGreen或White，无论boolflag是true还是false。

Window1.xaml：

<Window.Resources>

    <Style TargetType="{x:Type ListViewItem}">
        <Style.Triggers>
            <DataTrigger Binding="{Binding Path=BoolFlag}" Value="True">
                <Setter Property="Background" Value="LightGreen" />
            </DataTrigger>
        </Style.Triggers>
    </Style>

</Window.Resources>

<StackPanel>
    <ListView ItemsSource="{Binding Path=Personen}" SelectionMode="Single" SelectionChanged="ListViewSelectionChanged">
        <ListView.View>
            <GridView>
                <GridViewColumn DisplayMemberBinding="{Binding Path=Vorname}" Header="Vorname" />
                <GridViewColumn DisplayMemberBinding="{Binding Path=Nachname}" Header="Nachname" />
                <GridViewColumn DisplayMemberBinding="{Binding Path=Alter}" Header="Alter" />
                <GridViewColumn DisplayMemberBinding="{Binding Path=BoolFlag}" Header="BoolFlag" />
            </GridView>
        </ListView.View>
    </ListView>
</StackPanel>

Window1.xaml.cs：

public partial class Window1 : Window
{
    private IList<Person> _personen = new List<Person>();

    public Window1()
    {
        _personen.Add(new Person 
                {
                    Vorname = "Max",
                    Nachname = "Mustermann",
                    Alter = 18,
                    BoolFlag = false,
                });

        _personen.Add(new Person 
                {
                    Vorname = "Karl",
                    Nachname = "Mayer",
                    Alter = 27,
                    BoolFlag = true,
                });

        _personen.Add(new Person 
                {
                    Vorname = "Josef",
                    Nachname = "Huber",
                    Alter = 38,
                    BoolFlag = false,
                });

        DataContext = this;

        InitializeComponent();
    }

    public IList<Person> Personen
    {
        get
        {
            return _personen;
        }
    }

    private void ListViewSelectionChanged(object sender, SelectionChangedEventArgs e)
    {
        Person person = e.AddedItems[0] as Person;

        if (person != null)
        {
            if (person.BoolFlag)
            {
                this.Resources[SystemColors.HighlightBrushKey] = Brushes.Green;
            }
            else
            {
                this.Resources[SystemColors.HighlightBrushKey] = Brushes.RoyalBlue;
            }
        }
    }
}

Person.cs：

public class Person
{
    public string Vorname { get; set; }

    public string Nachname { get; set; }

    public int Alter { get; set; }

    public bool BoolFlag { get; set; }
}

现在我想根据boolflag设置所选项目的高亮颜色。在Code-Behind中，我这样做：

private void ListViewSelectionChanged(object sender, SelectionChangedEventArgs e)
    {
        Person person = e.AddedItems[0] as Person;

        if (person != null)
        {
            if (person.BoolFlag)
            {
                this.Resources[SystemColors.HighlightBrushKey] = Brushes.Green;
            }
            else
            {
                this.Resources[SystemColors.HighlightBrushKey] = Brushes.RoyalBlue;
            }
        }
    }
}

这很好用，但现在我想在XAML文件中定义上面的代码。

使用

<SolidColorBrush x:Key="{x:Static SystemColors.HighlightBrushKey}" Color="Green" />

我可以覆盖默认值。但是，它可以工作，但所有选定项目的颜色都设置为绿色。我尝试过不同的方法在XAML中切换Green和Blue之间HighlightBrushKey的颜色，具体取决于boolflag，但我没有成功。

你可以帮助我并给我一些例子吗？

Answer 1

不知道为什么highlightBrushKey不那么灵活。出于类似的原因，我开始使用其边框来设置所选项目背景颜色的另一种方法。您可以查看此http://vbcity.com/blogs/xtab/archive/2009/06/28/background-color-for-wpf-listbox-selected-item.aspx

在XAML中更改HighlighBrushKey的颜色

1 个答案: