在新的WpfApp1中,我添加了一个新的自定义控件(WPF)名称CustomButton。在其静态构造函数中,我将默认前景设置为黄色。在MainWindow.xaml中,我添加了CostomButton。
在设计师中,它的前景是黄色的(正确的)。运行应用程序,前景是黑色(错误)。
任何想法为什么会这样?
CustomButton.cs:
namespace WpfApp1
{
public class CustomButton : Button
{
static CustomButton()
{
DefaultStyleKeyProperty.OverrideMetadata(typeof(CustomButton), new FrameworkPropertyMetadata(typeof(CustomButton)));
CustomButton.ForegroundProperty.OverrideMetadata(typeof(CustomButton),
new FrameworkPropertyMetadata(Brushes.Yellow));
}
}
Generic.xaml:
<ResourceDictionary
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="clr-namespace:WpfApp1">
<Style TargetType="{x:Type local:CustomButton}">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type local:CustomButton}">
<Button
Foreground="{TemplateBinding Foreground}"
Content="asdf 01">
</Button>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
MainWindow.xaml:
<Window x:Class="WpfApp1.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:local="clr-namespace:WpfApp1"
mc:Ignorable="d"
Title="MainWindow" Height="450" Width="800">
<Grid>
<local:CustomButton Width="200" Height="100"/>
</Grid>
自定义Button的默认前景似乎被应用程序范围的样式覆盖。
而不是更改默认前景,将Setter添加到控件的默认样式:
<Style TargetType="local:CustomButton">
<Setter Property="Foreground" Value="Yellow"/>
...
</Style>