【发布时间】：2020-04-03 04:01:16
【问题描述】：
【问题讨论】：
【发布时间】：2020-04-03 04:01:16
【问题描述】：
您可以创建一个包含 Color 属性的 ViewModel，然后获取要显示的颜色列表并将列表与 GridView 绑定，在每个 GridViewItem 中创建一个椭圆以显示不同的颜色。下面我以系统颜色列表为例。
.xaml:
<GridView x:Name="colorList2" Width="400" Height="600" Background="LightGray" ItemsSource="{x:Bind Colors,Mode=OneWay}">
<GridView.ItemContainerStyle>
<Style TargetType="GridViewItem">
<Setter Property="Margin" Value="10"/>
</Style>
</GridView.ItemContainerStyle>
<GridView.ItemsPanel>
<ItemsPanelTemplate>
<ItemsWrapGrid Orientation="Horizontal" MaximumRowsOrColumns="5"/>
</ItemsPanelTemplate>
</GridView.ItemsPanel>
<GridView.ItemTemplate>
<DataTemplate>
<Grid>
<Ellipse Fill="{Binding Color}" Height="60" Width="60"/>
</Grid>
</DataTemplate>
</GridView.ItemTemplate>
</GridView>
.cs:
public class MyColor
{
public SolidColorBrush Color { get; set; }
}
public sealed partial class BlankPage1 : Page
{
public BlankPage1()
{
this.InitializeComponent();
Colors = new ObservableCollection<MyColor>();
foreach (var color in typeof(Colors).GetRuntimeProperties())
{
Colors.Add(new MyColor() { Color = new SolidColorBrush((Color)color.GetValue(null)) });
}
}
public ObservableCollection<MyColor> Colors { get; set; }
}
更新：
如果您想将点击项目的边框更改为黑色，您需要为您的 GridViewItem 更改覆盖 ItemContainerStyle。你可以去generic.xaml复制申请GridViewItem的GridViewItemExpanded样式。在 GridViewItemExpanded 样式中，有一个名为 BorderRectangle 的 Rectangle 代表边框，你只需要在不同的视觉状态下改变它的 Stroke 属性即可。
用法：
<GridView ItemContainerStyle="{StaticResource MyRoundItem2}">
......
风格：
<Page.Resources>
<Style TargetType="GridViewItem" x:Key="MyRoundItem">
......
<Setter Property="Margin" Value="10" />
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="GridViewItem">
<Grid x:Name="ContentBorder"
Control.IsTemplateFocusTarget="True"
FocusVisualMargin="{TemplateBinding FocusVisualMargin}"
Background="{TemplateBinding Background}"
BorderBrush="{TemplateBinding BorderBrush}"
BorderThickness="{TemplateBinding BorderThickness}"
CornerRadius="{TemplateBinding CornerRadius}"
RenderTransformOrigin="0.5,0.5">
<Grid.RenderTransform>
<ScaleTransform x:Name="ContentBorderScale" />
</Grid.RenderTransform>
<VisualStateManager.VisualStateGroups>
<VisualStateGroup x:Name="FocusStates">
<VisualState x:Name="Focused">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="BorderRectangle" Storyboard.TargetProperty="Visibility">
<DiscreteObjectKeyFrame KeyTime="0" Value="Collapsed" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="Unfocused" />
</VisualStateGroup>
<VisualStateGroup x:Name="CommonStates">
<VisualState x:Name="Normal">
<Storyboard>
<PointerUpThemeAnimation Storyboard.TargetName="ContentPresenter" />
</Storyboard>
</VisualState>
<VisualState x:Name="PointerOver">
<Storyboard>
<DoubleAnimation Storyboard.TargetName="BorderRectangle"
Storyboard.TargetProperty="Opacity"
Duration="0"
To="1" />
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="BorderRectangle" Storyboard.TargetProperty="Stroke">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource SystemControlHighlightListLowBrush}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentPresenter" Storyboard.TargetProperty="Foreground">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource SystemControlForegroundBaseHighBrush}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentBorder" Storyboard.TargetProperty="FocusVisualSecondaryBrush">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource SystemControlHighlightListLowBrush}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentBorder" Storyboard.TargetProperty="FocusVisualSecondaryThickness">
<DiscreteObjectKeyFrame KeyTime="0" Value="2" />
</ObjectAnimationUsingKeyFrames>
<PointerUpThemeAnimation Storyboard.TargetName="ContentPresenter" />
</Storyboard>
</VisualState>
<VisualState x:Name="Pressed">
<Storyboard>
<DoubleAnimation Storyboard.TargetName="BorderRectangle"
Storyboard.TargetProperty="Opacity"
Duration="0"
To="1" />
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="BorderRectangle" Storyboard.TargetProperty="Stroke">
<DiscreteObjectKeyFrame KeyTime="0" Value="Black" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentPresenter" Storyboard.TargetProperty="Foreground">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource SystemControlForegroundBaseHighBrush}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentBorder" Storyboard.TargetProperty="FocusVisualSecondaryBrush">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource SystemControlHighlightListMediumBrush}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentBorder" Storyboard.TargetProperty="FocusVisualSecondaryThickness">
<DiscreteObjectKeyFrame KeyTime="0" Value="2" />
</ObjectAnimationUsingKeyFrames>
<PointerDownThemeAnimation TargetName="ContentPresenter" />
</Storyboard>
</VisualState>
<VisualState x:Name="Selected">
<Storyboard>
<DoubleAnimation Storyboard.TargetName="MultiSelectCheck"
Storyboard.TargetProperty="Opacity"
Duration="0"
To="1" />
<DoubleAnimation Storyboard.TargetName="BorderRectangle"
Storyboard.TargetProperty="Opacity"
Duration="0"
To="1" />
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="BorderRectangle" Storyboard.TargetProperty="Stroke">
<DiscreteObjectKeyFrame KeyTime="0" Value="Black" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentPresenter" Storyboard.TargetProperty="Foreground">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource SystemControlForegroundBaseHighBrush}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentBorder" Storyboard.TargetProperty="FocusVisualSecondaryBrush">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource SystemControlHighlightAccentBrush}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentBorder" Storyboard.TargetProperty="FocusVisualSecondaryThickness">
<DiscreteObjectKeyFrame KeyTime="0" Value="2" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="MultiSelectSquare" Storyboard.TargetProperty="Background">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource SystemControlHighlightAccentBrush}" />
</ObjectAnimationUsingKeyFrames>
<PointerUpThemeAnimation Storyboard.TargetName="ContentPresenter" />
</Storyboard>
</VisualState>
<VisualState x:Name="PointerOverSelected">
<Storyboard>
<DoubleAnimation Storyboard.TargetName="MultiSelectCheck"
Storyboard.TargetProperty="Opacity"
Duration="0"
To="1" />
<DoubleAnimation Storyboard.TargetName="BorderRectangle"
Storyboard.TargetProperty="Opacity"
Duration="0"
To="1" />
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="BorderRectangle" Storyboard.TargetProperty="Stroke">
<DiscreteObjectKeyFrame KeyTime="0" Value="Black" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentPresenter" Storyboard.TargetProperty="Foreground">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource SystemControlForegroundBaseHighBrush}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentBorder" Storyboard.TargetProperty="FocusVisualSecondaryBrush">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource SystemControlHighlightListAccentMediumBrush}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentBorder" Storyboard.TargetProperty="FocusVisualSecondaryThickness">
<DiscreteObjectKeyFrame KeyTime="0" Value="2" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="MultiSelectSquare" Storyboard.TargetProperty="Background">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource SystemControlHighlightAccentBrush}" />
</ObjectAnimationUsingKeyFrames>
<PointerUpThemeAnimation Storyboard.TargetName="ContentPresenter" />
</Storyboard>
</VisualState>
<VisualState x:Name="PressedSelected">
<Storyboard>
<DoubleAnimation Storyboard.TargetName="MultiSelectCheck"
Storyboard.TargetProperty="Opacity"
Duration="0"
To="1" />
<DoubleAnimation Storyboard.TargetName="BorderRectangle"
Storyboard.TargetProperty="Opacity"
Duration="0"
To="1" />
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="BorderRectangle" Storyboard.TargetProperty="Stroke">
<DiscreteObjectKeyFrame KeyTime="0" Value="Black" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentPresenter" Storyboard.TargetProperty="Foreground">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource SystemControlForegroundBaseHighBrush}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentBorder" Storyboard.TargetProperty="FocusVisualSecondaryBrush">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource SystemControlHighlightListAccentHighBrush}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentBorder" Storyboard.TargetProperty="FocusVisualSecondaryThickness">
<DiscreteObjectKeyFrame KeyTime="0" Value="2" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="MultiSelectSquare" Storyboard.TargetProperty="Background">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource SystemControlHighlightAccentBrush}" />
</ObjectAnimationUsingKeyFrames>
<PointerDownThemeAnimation TargetName="ContentPresenter" />
</Storyboard>
</VisualState>
</VisualStateGroup>
<VisualStateGroup x:Name="DisabledStates">
<VisualState x:Name="Enabled" />
<VisualState x:Name="Disabled">
<Storyboard>
<DoubleAnimation Storyboard.TargetName="ContentBorder"
Storyboard.TargetProperty="Opacity"
Duration="0"
To="{ThemeResource ListViewItemDisabledThemeOpacity}" />
</Storyboard>
</VisualState>
</VisualStateGroup>
<VisualStateGroup x:Name="MultiSelectStates">
<VisualState x:Name="MultiSelectDisabled">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="MultiSelectSquare" Storyboard.TargetProperty="Visibility">
<DiscreteObjectKeyFrame KeyTime="0" Value="Visible" />
<DiscreteObjectKeyFrame KeyTime="0:0:0.333" Value="Collapsed" />
</ObjectAnimationUsingKeyFrames>
<FadeOutThemeAnimation TargetName="MultiSelectSquare" />
</Storyboard>
</VisualState>
<VisualState x:Name="MultiSelectEnabled">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="MultiSelectSquare" Storyboard.TargetProperty="Visibility">
<DiscreteObjectKeyFrame KeyTime="0" Value="Visible" />
</ObjectAnimationUsingKeyFrames>
<FadeInThemeAnimation TargetName="MultiSelectSquare" />
</Storyboard>
</VisualState>
</VisualStateGroup>
<VisualStateGroup x:Name="DataVirtualizationStates">
<VisualState x:Name="DataAvailable" />
<VisualState x:Name="DataPlaceholder">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="PlaceholderTextBlock" Storyboard.TargetProperty="Visibility">
<DiscreteObjectKeyFrame KeyTime="0" Value="Visible" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="PlaceholderRect" Storyboard.TargetProperty="Visibility">
<DiscreteObjectKeyFrame KeyTime="0" Value="Visible" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
</VisualStateGroup>
<VisualStateGroup x:Name="ReorderHintStates">
<VisualState x:Name="NoReorderHint" />
<VisualState x:Name="BottomReorderHint">
<Storyboard>
<DragOverThemeAnimation TargetName="ContentBorder" ToOffset="{ThemeResource GridViewItemReorderHintThemeOffset}" Direction="Bottom" />
</Storyboard>
</VisualState>
<VisualState x:Name="TopReorderHint">
<Storyboard>
<DragOverThemeAnimation TargetName="ContentBorder" ToOffset="{ThemeResource GridViewItemReorderHintThemeOffset}" Direction="Top" />
</Storyboard>
</VisualState>
<VisualState x:Name="RightReorderHint">
<Storyboard>
<DragOverThemeAnimation TargetName="ContentBorder" ToOffset="{ThemeResource GridViewItemReorderHintThemeOffset}" Direction="Right" />
</Storyboard>
</VisualState>
<VisualState x:Name="LeftReorderHint">
<Storyboard>
<DragOverThemeAnimation TargetName="ContentBorder" ToOffset="{ThemeResource GridViewItemReorderHintThemeOffset}" Direction="Left" />
</Storyboard>
</VisualState>
<VisualStateGroup.Transitions>
<VisualTransition To="NoReorderHint" GeneratedDuration="0:0:0.2" />
</VisualStateGroup.Transitions>
</VisualStateGroup>
<VisualStateGroup x:Name="DragStates">
<VisualState x:Name="NotDragging" />
<VisualState x:Name="Dragging">
<Storyboard>
<DoubleAnimation Storyboard.TargetName="ContentBorder"
Storyboard.TargetProperty="Opacity"
Duration="0"
To="{ThemeResource ListViewItemDragThemeOpacity}" />
<DragItemThemeAnimation TargetName="ContentBorder" />
</Storyboard>
</VisualState>
<VisualState x:Name="DraggingTarget" />
<VisualState x:Name="MultipleDraggingPrimary">
<Storyboard>
<DoubleAnimation Storyboard.TargetName="MultiArrangeOverlayText"
Storyboard.TargetProperty="Opacity"
Duration="0"
To="1" />
<DoubleAnimation Storyboard.TargetName="MultiArrangeOverlayTextBorder"
Storyboard.TargetProperty="Opacity"
Duration="0"
To="1" />
<DoubleAnimation Storyboard.TargetName="MultiSelectSquare"
Storyboard.TargetProperty="Opacity"
Duration="0"
To="0" />
<DoubleAnimation Storyboard.TargetName="MultiSelectCheck"
Storyboard.TargetProperty="Opacity"
Duration="0"
To="0" />
<DoubleAnimation Storyboard.TargetName="ContentBorder"
Storyboard.TargetProperty="Opacity"
Duration="0"
To="{ThemeResource ListViewItemDragThemeOpacity}" />
<FadeInThemeAnimation TargetName="MultiArrangeOverlayText" />
<FadeInThemeAnimation TargetName="MultiArrangeOverlayTextBorder" />
<DragItemThemeAnimation TargetName="ContentBorder" />
</Storyboard>
</VisualState>
<VisualState x:Name="MultipleDraggingSecondary" />
<VisualState x:Name="DraggedPlaceholder" />
<VisualState x:Name="Reordering">
<Storyboard>
<DoubleAnimation Storyboard.TargetName="ContentBorder"
Storyboard.TargetProperty="Opacity"
Duration="0:0:0.240"
To="{ThemeResource ListViewItemReorderThemeOpacity}" />
</Storyboard>
</VisualState>
<VisualState x:Name="ReorderingTarget">
<Storyboard>
<DoubleAnimation Storyboard.TargetName="ContentBorder"
Storyboard.TargetProperty="Opacity"
Duration="0:0:0.240"
To="{ThemeResource ListViewItemReorderTargetThemeOpacity}" />
<DoubleAnimation Storyboard.TargetName="ContentBorderScale"
Storyboard.TargetProperty="ScaleX"
Duration="0:0:0.240"
To="{ThemeResource ListViewItemReorderTargetThemeScale}" />
<DoubleAnimation Storyboard.TargetName="ContentBorderScale"
Storyboard.TargetProperty="ScaleY"
Duration="0:0:0.240"
To="{ThemeResource ListViewItemReorderTargetThemeScale}" />
</Storyboard>
</VisualState>
<VisualState x:Name="MultipleReorderingPrimary">
<Storyboard>
<!-- These two Opacity animations are required - the FadeInThemeAnimations
on the same elements animate an internal Opacity. -->
<DoubleAnimation Storyboard.TargetName="MultiArrangeOverlayText"
Storyboard.TargetProperty="Opacity"
Duration="0"
To="1" />
<DoubleAnimation Storyboard.TargetName="MultiArrangeOverlayTextBorder"
Storyboard.TargetProperty="Opacity"
Duration="0"
To="1" />
<DoubleAnimation Storyboard.TargetName="MultiSelectSquare"
Storyboard.TargetProperty="Opacity"
Duration="0"
To="0" />
<DoubleAnimation Storyboard.TargetName="MultiSelectCheck"
Storyboard.TargetProperty="Opacity"
Duration="0"
To="0" />
<DoubleAnimation Storyboard.TargetName="ContentBorder"
Storyboard.TargetProperty="Opacity"
Duration="0:0:0.240"
To="{ThemeResource ListViewItemDragThemeOpacity}" />
<FadeInThemeAnimation TargetName="MultiArrangeOverlayText" />
<FadeInThemeAnimation TargetName="MultiArrangeOverlayTextBorder" />
</Storyboard>
</VisualState>
<VisualState x:Name="ReorderedPlaceholder">
<Storyboard>
<FadeOutThemeAnimation TargetName="ContentBorder" />
</Storyboard>
</VisualState>
<VisualState x:Name="DragOver">
<Storyboard>
<DropTargetItemThemeAnimation TargetName="ContentBorder" />
</Storyboard>
</VisualState>
<VisualStateGroup.Transitions>
<VisualTransition To="NotDragging" GeneratedDuration="0:0:0.2" />
</VisualStateGroup.Transitions>
</VisualStateGroup>
</VisualStateManager.VisualStateGroups>
......
</Grid>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</Page.Resources>
【讨论】：
-
它，工作正常..我需要，当我点击一个gridviewItem时，我想让点击项目的边框变黑，如果点击另一个项目，我想让前一个边框透明并且将当前选定的边框设为黑色.. 有吗？？？
-
当一个item被点击时，我想获取那个item的DataTemplete，如何获取呢？？
-
为什么要拿到它的DataTemplete，要做什么？
-
我想要数据模板中的元素...我想在运行时更改元素属性
-
您可以创建一个与 UIElement 绑定的属性，然后只需在代码隐藏中更改该属性。关于这个，可以参考这个document实现绑定。