尝试在字符串格式中转换颜色t在switch case中使用

时间:2016-12-20 11:22:17

标签: c# xaml uwp

我正在尝试将字符串格式的颜色转换为在开关盒中使用,以检查填充椭圆的颜色,并根据我想要填充ttf图标中的颜色。在“Header_P”的Tapped事件上,我想检查填充Ellipse“chkColor”的颜色并使用相同的颜色,我想填充“colorimg”ttf图标,颜色相同

的Xaml

 <Image x:Name="Header_P" 
            Source="Assets/Paint/bg_paint_sub.png"              
               Height="250" Width="600"
              RelativePanel.AlignHorizontalCenterWithPanel="True"
               Margin="0,60,40,0"
                   Opacity="0.8"
                   Tapped="Header_P"
               />
            <Ellipse x:Name="chkColor" Height="40" Width="40"
                     RelativePanel.AlignHorizontalCenterWithPanel="True"
                     RelativePanel.AlignRightWithPanel="True"
                     Margin="0,140,235,0"></Ellipse>
    <TextBlock x:Name="colorimg"
            Text="0" TextAlignment="Center" 
                   RelativePanel.AlignHorizontalCenterWithPanel="True"                  
                   FontFamily="Font/fill-icons.ttf#fill-icons"
                   FontSize="170"
                   Margin="0,90,50,0"/>

c#c​​ode

private void Header_P(object sender, TappedRoutedEventArgs e)
{
    string colorn = chkColor.GetValue();
    switch ()
    {
        default:
            break;
    }
}

2 个答案:

答案 0 :(得分:1)

这可以通过XAML轻松完成,而不是使用行为

后面的代码

Behaviors SDK不是内置的UWP,但必须与NuGet分开下载。

Microsoft.Xaml.Behaviors.Uwp.Managed安装NuGet包。

安装后,您只需将XAML using语句添加到页面顶部:

<Page ...
xmlns:Interactivity="using:Microsoft.Xaml.Interactivity"
xmlns:Core="using:Microsoft.Xaml.Interactions.Core" />

并将您的Header_p更改为以下内容。

<Image x:Name="Header_P" Source="Assets/Paint/bg_paint_sub.png" Height="250" Opacity="0.8" >
    <Interactivity:Interaction.Behaviors>
        <Core:EventTriggerBehavior EventName="Tapped" SourceObject="{Binding ElementName=chkColor, Mode=OneWay}" >
            <Core:EventTriggerBehavior.Actions>
                <Core:ChangePropertyAction PropertyName="Foreground" TargetObject="{Binding ElementName=colorimg}" Value="{Binding Fill, ElementName=chkColor}"/>
            </Core:EventTriggerBehavior.Actions>
        </Core:EventTriggerBehavior>
    </Interactivity:Interaction.Behaviors>
</Image>

答案 1 :(得分:0)

如果它是SolidColorBrush,则此片段从Brush中提取颜色。

private void Header_P(object sender, TappedRoutedEventArgs e)
{
    var colorBrush = chkColor.Fill as SolidColorBrush;
    if (colorBrush != null)
    {
        colorimg.Foreground = new SolidColorBrush(colorBrush.Color);
    }
}