[英]WPF XAML custom control to look like an LED
我想要一個看起來像 LED 的控件,我在這里找到了這段代碼WPF 自定義 LED 復選框問題是我無法讓它改變顏色。 當我開始輸入觸發器 OnColor 或 OffColor 時,它說該成員未被識別。 這是代碼
<UserControl x:Class="WpfLed.LedControl"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:local="clr-namespace:WpfLed"
mc:Ignorable="d"
d:DesignHeight="300" d:DesignWidth="300">
<Style TargetType="local:LedControl">
<Setter Property="VerticalContentAlignment" Value="Center"/>
<Setter Property="BorderBrush" Value="Black"/>
<Setter Property="Margin" Value="5"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="local:LedControl">
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto"/>
<ColumnDefinition/>
</Grid.ColumnDefinitions>
<Grid Background="Transparent" Name="grd"
Margin="{TemplateBinding Padding}"
VerticalAlignment="Stretch"
Width="{Binding Path=ActualHeight, Mode=OneWay, RelativeSource={RelativeSource Self}}">
<Ellipse x:Name="LedBorder"
Fill="{TemplateBinding Background}"
Stroke="{TemplateBinding BorderBrush}"
StrokeThickness="2"
Stretch="Uniform"/>
<Ellipse x:Name="CenterGlow" Stretch="Uniform">
<Ellipse.Fill>
<RadialGradientBrush>
<GradientStop Color="White" Offset="-0.25"/>
<GradientStop Color="Transparent" Offset="0.91"/>
</RadialGradientBrush>
</Ellipse.Fill>
</Ellipse>
<Ellipse x:Name="CornerLight" Stretch="Uniform" Margin="2">
<Ellipse.Fill>
<RadialGradientBrush Center="0.15 0.15" RadiusX="0.5" RadiusY="0.5">
<GradientStop Color="White" Offset="0"/>
<GradientStop Color="Transparent" Offset="1"/>
</RadialGradientBrush>
</Ellipse.Fill>
</Ellipse>
</Grid>
<ContentPresenter x:Name="content" Grid.Column="1" Margin="4,0,0,0"
VerticalAlignment="{TemplateBinding VerticalContentAlignment}"
HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
RecognizesAccessKey="True"/>
</Grid>
<ControlTemplate.Triggers>
<Trigger Property="IsChecked" Value="true">
<Setter TargetName="LedBorder" Property="Fill" Value="{Binding Path=OnColor, RelativeSource={RelativeSource TemplatedParent}}"/>
<Setter TargetName="content" Property="TextElement.Foreground" Value="Black"/>
</Trigger>
<Trigger Property="IsChecked" Value="false">
<Setter TargetName="LedBorder" Property="Fill" Value="{Binding Path=OffColor, RelativeSource={RelativeSource TemplatedParent}}"/>
<Setter TargetName="content" Property="TextElement.Foreground" Value="Black"/>
</Trigger>
<Trigger Property="IsEnabled" Value="false">
<Setter TargetName="CenterGlow" Property="Fill">
<Setter.Value>
<RadialGradientBrush Opacity="1">
<GradientStop Color="Transparent" Offset="-0.5" />
<GradientStop Color="#888" Offset="1" />
</RadialGradientBrush>
</Setter.Value>
</Setter>
<Setter TargetName="content" Property="TextElement.Foreground" Value="#888"/>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
這是我嘗試使用它的方式
<local:LedControl IsChecked="true" IsEnabled="true" OnColor="Green" x:Name="Led1" Content="Led1" HorizontalAlignment="Left" Margin="10,33,0,0" VerticalAlignment="Top"/>
這是用戶控件中的 C# 代碼
using System.Windows;
using System.Windows.Controls;
using System.Windows.Media;
namespace WpfLed
{
public partial class LedControl : UserControl
{
static LedControl()
{
DefaultStyleKeyProperty.OverrideMetadata(typeof(LedControl), new FrameworkPropertyMetadata(typeof(LedControl)));
}
public static readonly DependencyProperty OnColorProperty =
DependencyProperty.Register("OnColor", typeof(Brush), typeof(LedControl), new PropertyMetadata(Brushes.Green));
public Brush OnColor
{
get { return (Brush)GetValue(OnColorProperty); }
set { SetValue(OnColorProperty, value); }
}
public static readonly DependencyProperty OffColorProperty =
DependencyProperty.Register("OffColor", typeof(Brush), typeof(LedControl), new PropertyMetadata(Brushes.Red));
public Brush OffColor
{
get { return (Brush)GetValue(OffColorProperty); }
set { SetValue(OffColorProperty, value); }
}
}
}
我什至嘗試重建解決方案,我確信它很簡單,我忽略了。
編輯:我將模板置於用戶控制之下我忘記發布 C# 代碼來添加依賴項,但它仍然無法識別該控件。 我更新了上面的代碼以反映更改。 我是使用 WPF 和 XAML 的新手,當我嘗試在 MainWindow.xaml 中使用它時,我在 UserControl 中沒有收到任何錯誤
CheckBox 類(即類型)沒有名為 OnColor 和 OffColor 的依賴屬性。
您需要創建一個繼承自 CheckBox 的新類,並將這兩個新的 Dep Props 添加到其中。
或者改用 AttachedProperty。
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