wp7,listBox选中项颜色改变
您可以使用 ItemContainerGenerator 并基于项的索引来检索项或通过指定数据项来检索容器。例如,如果您有一个绑定了数据的ItemsControl,并希望基于其索引获取一个项,则可以使用 ItemContainerGenerator..::..ContainerFromIndex 方法。如果想检索数据项,可使用 ItemContainerGenerator..::..ItemFromContainer 方法。
1)代码:
listBox的选中项的背景色是实时的,因此在页面中定义一个实时变量 private int _index = -1;
因此在listBox的SelectionChanged事件中,index=-1表示没有选中项,直接选中项赋背景色;index有具体的值,之前的选中项_index恢复到原来的背景色null:
if (_index != -1) (listData.ItemContainerGenerator.ContainerFromIndex(_index) as ListBoxItem).Background = null; (listData.ItemContainerGenerator.ContainerFromItem(listData.SelectedItem) as ListBoxItem).Background = new SolidColorBrush(Colors.Red); _index = listData.SelectedIndex;//获取此次选中项的index
补充:
a.Background是背景色,Foreground字体颜色,根据需要选择;
b.很多情况下并不是颜色并不是null,有些时候可能是英文Red|Blue等,这样很简单,直接Colors.Red就好,有些时候可能是十六进制#265546,或者RGB这个时候就麻烦点,我们要进行转换,幸运的是系统已经提供了方法:
把十六进制颜色转化为color对象
ColorTranslator.FromHtml("#FF0000")
或 ColorTranslator.FromHtml("Red");
把color对象转化为十六进制颜色
ColorTranslator.ToHtml(Color.FromArgb(255,255,255))
或 ColorTranslator.ToHtml(Color.Red);
等等,这个ColorTranslator类在System.Drawing下,具体的可以详见Drawing类;
2)style:
<Style x:Key="ListBoxItemStyle1" TargetType="ListBoxItem"> <Setter Property="Background" Value="Transparent"/> <Setter Property="BorderThickness" Value="0"/> <Setter Property="BorderBrush" Value="Transparent"/> <Setter Property="Padding" Value="0"/> <Setter Property="HorizontalContentAlignment" Value="Left"/> <Setter Property="VerticalContentAlignment" Value="Top"/> <Setter Property="Template"> <Setter.Value> <ControlTemplate TargetType="ListBoxItem"> <Border x:Name="LayoutRoot" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" HorizontalAlignment="{TemplateBinding HorizontalAlignment}" VerticalAlignment="{TemplateBinding VerticalAlignment}"> <VisualStateManager.VisualStateGroups> <VisualStateGroup x:Name="CommonStates"> <VisualState x:Name="Normal"/> <VisualState x:Name="MouseOver"/> <VisualState x:Name="Disabled"> <Storyboard> <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Background" Storyboard.TargetName="LayoutRoot"> <DiscreteObjectKeyFrame KeyTime="0" Value="{StaticResource TransparentBrush}"/> </ObjectAnimationUsingKeyFrames> <DoubleAnimation Duration="0" To=".5" Storyboard.TargetProperty="Opacity" Storyboard.TargetName="ContentContainer"/> </Storyboard> </VisualState> </VisualStateGroup> <VisualStateGroup x:Name="SelectionStates"> <VisualState x:Name="Unselected"> <Storyboard> <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Foreground" Storyboard.TargetName="ContentContainer"> <DiscreteObjectKeyFrame KeyTime="0" Value="White"></DiscreteObjectKeyFrame> </ObjectAnimationUsingKeyFrames> </Storyboard> </VisualState> <VisualState x:Name="Selected"> <Storyboard> <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Foreground" Storyboard.TargetName="ContentContainer"> <DiscreteObjectKeyFrame KeyTime="0" Value="Blue"/> </ObjectAnimationUsingKeyFrames> </Storyboard> </VisualState> </VisualStateGroup> </VisualStateManager.VisualStateGroups> <ContentControl x:Name="ContentContainer" ContentTemplate="{TemplateBinding ContentTemplate}" Content="{TemplateBinding Content}" Foreground="{TemplateBinding Foreground}" HorizontalContentAlignment="{TemplateBinding HorizontalContentAlignment}" Margin="{TemplateBinding Padding}" VerticalContentAlignment="{TemplateBinding VerticalContentAlignment}"/> </Border> </ControlTemplate> </Setter.Value> </Setter> </Style>
主要就是Unselected和Selected状态下写Storyboard动画板,这样就可以了,原文楼主地址:http://www.cnblogs.com/asnowTT/archive/2012/01/11/2319714.html,稍微改进了一点,感谢