Question

我想改变每个listboxitem增加边框的颜色os背景。

 <ListBox.ItemTemplate>
            <DataTemplate>
                <border x:name: border>
                   <ListBoxItem ItemSource={Binding Example}>
                   </ListBoxItem>
                </border>

任何想法？

Answer 1

首先检查this link，了解如何使用转换器。

然后在你的XAML中，像这样写下你的边框

<Border BorderBrush="{Binding Converter=ColorConverter}">
 ....
<Border>

将转换器代码修改为此类

public class ColorConverter : IValueConverter
{
public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
{
    //Define some random colors
    Color[] colors = { Colors.Blue, Colors.Brown, Colors.Cyan, Colors.Green, Colors.Magenta, Colors.Orange, Colors.Purple, Colors.Yellow, Colors.LightGray };

    return colors[(new Random()).Next(8)];
}

public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
{

}
}

因此，此代码动态返回其中一种颜色。并且有机会持续获得相同的颜色。顺便说一句，我没有测试上面的代码。

Answer 2

“IValueConverter”的TypeConverter不支持转换

当我像上面那样放置边框会导致此错误。

这是我的完整代码

<ItemsControl x:Name="listaAdd" ItemsSource="{Binding sample}"  Grid.Row="0" Margin="0,221,0,0" Foreground="White" Background="#FF5B5B5B" >
        <ItemsControl.ItemTemplate>
            <DataTemplate>
                <Grid HorizontalAlignment="Stretch" Grid.Row="1" Width="480" >
                    <Border x:Name="borda" BorderBrush="{Binding Converter=ColorConverter}"  >
                        <ListBoxItem x:Name="listSelected" Foreground="White" IsSelected="True"  VerticalAlignment="Center"  FontSize="{StaticResource PhoneFontSizeLarge}" Content="{Binding Nome}"  Background="{x:Null}" HorizontalContentAlignment="Left" Height="80" DoubleTap="listSelected_DoubleTap">
                        </ListBoxItem>
                    </Border>
                    <toolkit:ContextMenuService.ContextMenu>
                        <toolkit:ContextMenu x:Name="subMenulist">
                            <Button Grid.Column="1" Content="delete"   BorderThickness="0" Margin="0"  Background="White" Foreground="#FF1A739D" FontSize="32" HorizontalContentAlignment="Left">
                            </Button>
                            <Button Grid.Column="1" Content="compartilhar" Margin="0,0,0,0" x:Name="btnShare" BorderThickness="0"  Background="White" Foreground="#FF1A739D" FontSize="32" HorizontalContentAlignment="Left">
                            </Button>
                        </toolkit:ContextMenu>
                    </toolkit:ContextMenuService.ContextMenu>
                </Grid>
            </DataTemplate>
        </ItemsControl.ItemTemplate>
    </ItemsControl>

我如何获得windows phone中的dataTemplate控件？

2 个答案: