我自己也遇到了同样的问题。我在这里创建了一个开源项目 http://imagebuttonwpf.codeplex.com,您可以在这里获取最新版本的图像按钮。
虽然这个StackOverflow问题的“已接受”答案提供了一种轻量级的解决方案并且有其自身的优点,但我不喜欢它的原因之一是(主要是)我认为覆盖每个要更改图像的按钮的控件模板是不正确的。
块引用:这个StackOverflow问题的“已接受”答案显示了一种简单的方法来做到这一点:WPF - How to create image button with template
主要是因为我不想每次都重写整个控件模板来更改按钮的图像,因此我创建了一个名为ImageButton的自定义控件。 它从按钮扩展,以便具有任何其功能(虽然它也可以很容易地从内容控件扩展),但还包含一个可以被样式化的图像,而无需重写整个控件模板。
我不喜欢每次都重写我的按钮的整个控件模板的另一个原因是,我的基本按钮样式包含了鼠标悬停、按下等的几个边框和动画效果。每次重写这些东西显然都有其冗余问题。
无论如何,下面是ImageButton类:
public class ImageButton : Button
{
static ImageButton() {
DefaultStyleKeyProperty.OverrideMetadata(typeof(ImageButton), new FrameworkPropertyMetadata(typeof(ImageButton)));
}
#region Dependency Properties
public double ImageSize
{
get { return (double)GetValue(ImageSizeProperty); }
set { SetValue(ImageSizeProperty, value); }
}
public static readonly DependencyProperty ImageSizeProperty =
DependencyProperty.Register("ImageSize", typeof(double), typeof(ImageButton),
new FrameworkPropertyMetadata(30.0, FrameworkPropertyMetadataOptions.AffectsRender, ImageSourceChanged));
public string NormalImage
{
get { return (string)GetValue(NormalImageProperty); }
set { SetValue(NormalImageProperty, value); }
}
public static readonly DependencyProperty NormalImageProperty =
DependencyProperty.Register("NormalImage", typeof(string), typeof(ImageButton),
new FrameworkPropertyMetadata("", FrameworkPropertyMetadataOptions.AffectsRender,ImageSourceChanged));
public string HoverImage
{
get { return (string)GetValue(HoverImageProperty); }
set { SetValue(HoverImageProperty, value); }
}
public static readonly DependencyProperty HoverImageProperty =
DependencyProperty.Register("HoverImage", typeof(string), typeof(ImageButton),
new FrameworkPropertyMetadata("", FrameworkPropertyMetadataOptions.AffectsRender, ImageSourceChanged));
public string PressedImage
{
get { return (string)GetValue(PressedImageProperty); }
set { SetValue(PressedImageProperty, value); }
}
public static readonly DependencyProperty PressedImageProperty =
DependencyProperty.Register("PressedImage", typeof(string), typeof(ImageButton),
new FrameworkPropertyMetadata("", FrameworkPropertyMetadataOptions.AffectsRender, ImageSourceChanged));
public string DisabledImage
{
get { return (string)GetValue(DisabledImageProperty); }
set { SetValue(DisabledImageProperty, value); }
}
public static readonly DependencyProperty DisabledImageProperty =
DependencyProperty.Register("DisabledImage", typeof(string), typeof(ImageButton),
new FrameworkPropertyMetadata("", FrameworkPropertyMetadataOptions.AffectsRender, ImageSourceChanged));
private static void ImageSourceChanged(DependencyObject sender, DependencyPropertyChangedEventArgs e)
{
Application.GetResourceStream(new Uri("pack://application:,,," + (string) e.NewValue));
}
#endregion
接下来,我们需要为我们的按钮提供一个默认的控件模板。我已经将大部分边框等内容删除了,除了一个边框,这样您可以看到它在我们所有样式中都被继承了。
<ControlTemplate x:Key="ImageButtonTemplate" TargetType="{x:Type Controls:ImageButton}">
<Grid x:Name="Grid">
<Border x:Name="Background" Background="{TemplateBinding Background}" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" CornerRadius="3" />
<StackPanel Orientation="Horizontal" VerticalAlignment="Center" HorizontalAlignment="Center">
<Image x:Name="ButtonImage" Source="{Binding NormalImage, RelativeSource={RelativeSource TemplatedParent}}"
Height="{Binding ImageSize, RelativeSource={RelativeSource TemplatedParent}}"
Width="{Binding ImageSize, RelativeSource={RelativeSource TemplatedParent}}"/>
<ContentPresenter HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" Margin="{TemplateBinding Padding}" VerticalAlignment="{TemplateBinding VerticalContentAlignment}" RecognizesAccessKey="True" />
</StackPanel>
</Grid>
<ControlTemplate.Triggers>
<Trigger Property="IsMouseOver" Value="true">
<Setter TargetName="ButtonImage" Property="Source" Value="{Binding HoverImage, RelativeSource={RelativeSource TemplatedParent}}" />
</Trigger>
<Trigger Property="IsPressed" Value="true">
<Setter TargetName="ButtonImage" Property="Source" Value="{Binding PressedImage, RelativeSource={RelativeSource TemplatedParent}}" />
</Trigger>
<Trigger Property="IsEnabled" Value="false">
<Setter TargetName="ButtonImage" Property="Source" Value="{Binding DisabledImage, RelativeSource={RelativeSource TemplatedParent}}" />
</Trigger>
</ControlTemplate.Triggers>
当然,我们需要为新的图像按钮设置默认样式。
<Style TargetType="{x:Type Controls:ImageButton}" BasedOn="{x:Null}">
<Setter Property="Template" Value="{StaticResource ImageButtonTemplate}" />
</Style>
当然,使用我创建的这种方法的好处是,我已经基于父样式创建了一个样式,它使用Setter来更改依赖属性(而不是需要重写控件模板-这是目标)。
<Style x:Key="TestImageButton" TargetType="{x:Type Controls:ImageButton}" BasedOn="{StaticResource {x:Type Controls:ImageButton}}">
<Setter Property="NormalImage" Value="/ImageButton;component/Resources/clear.png"/>
<Setter Property="HoverImage" Value="/ImageButton;component/Resources/clear_green.png" />
<Setter Property="PressedImage" Value="/ImageButton;component/Resources/clear_darkgreen.png" />
<Setter Property="DisabledImage" Value="/ImageButton;component/Resources/clear_grey.png" />
</Style>
最后,这意味着可以通过几种不同的方式声明按钮,可以在XAML中声明图像路径。
<Controls:ImageButton
Content="Test Button 1"
NormalImage="/ImageButton;component/Resources/edit.png"
HoverImage="/ImageButton;component/Resources/edit_black.png"
PressedImage="/ImageButton;component/Resources/edit_darkgrey.png"
DisabledImage="/ImageButton;component/Resources/edit_grey.png"/>
或者可以使用样式
<Controls:ImageButton
Content="Test Button 2"
Style="{DynamicResource TestImageButton}"/>
希望这能有所帮助。