我有一个像这样的 XAML 按钮:
<Button x:Name="buttonOK" Content="OK" />
我没有附加 XAML 样式，也没有资源字典样式。没有外部的东西在设计我的按钮，这很好；这就是我想要的。
现在，我想在后面的代码中更改该按钮的 RadiusX 和 RadiusY，因为我想要一个带有圆边的按钮。我知道 System.Windows.Controls.Button 没有这些属性，但我知道 WPF 矩形有。
我不知道这是否正确；但是WPF按钮控件是由其他控件组成的？正确的？就像一个矩形和一个文本 block 或标签，通过设置 Button.Content，您实际上是在更改按钮的内部标签的内容。我不确定我的想法有多天真。
底线是我想做这样的事情:
buttonOK.InnerRectangle.RadiusX = 5;
buttonOK.InnerRectangle.RadiusY = 5;
我希望一切都在代码中，而不是 XAML，因为我在不同的 XAML 文件中有很多按钮，我想通过在代码中调用一个方法而不更改每个 XAML 文件来圆化它们的边缘。并非所有 XAML 文件中的所有按钮，只有某些按钮。
我已经在我的所有窗口和用户控件中调用了一个方法，我只想将按钮圆边样式添加到该方法，这样就不会导致代码冗长乏味。
最佳答案
将 XAML 从字符串加载到 Style 对象，该对象允许在代码中更改圆角半径，然后设置按钮样式。
这是对我有用的代码:
// OK
private void buttonOK_Click(object sender, RoutedEventArgs e)
{
try
{
SetButtonCornerRadiusAndTriggerStyling(buttonOK, 5);
}
catch (Exception ex)
{
MessageBox.Show("Error at 'buttonOK_Click'" + Environment.NewLine + Environment.NewLine + ex.Message, "Error", MessageBoxButton.OK, MessageBoxImage.Error);
}
}
// Set button corner radius and trigger styling
public static void SetButtonCornerRadiusAndTriggerStyling(
Button toStyle, int theCornerRadius,
string theMouseOverBackground = "", string theMouseOverBorderBrush = "", string theMouseOverForeground = "",
string thePressedBackground = "", string thePressedBorderBrush = "", string thePressedForeground = "",
string theDisabledBackground = "", string theDisabledBorderBrush = "", string theDisabledForeground = "")
{
try
{
// Corner radius
int cornerRadius = theCornerRadius;
// Mouse over
string defaultMouseOverBackground = "#BEE6FD";
string defaultMouseOverBorderBrush = "#3C7FB1";
string defaultMouseOverForeground = "Black";
string mouseOverBackground = theMouseOverBackground;
string mouseOverBorderBrush = theMouseOverBorderBrush;
string mouseOverForeground = theMouseOverForeground;
if (mouseOverBackground == null) { mouseOverBackground = ""; }
if (mouseOverBorderBrush == null) { mouseOverBorderBrush = ""; }
if (mouseOverForeground == null) { mouseOverForeground = ""; }
if (mouseOverBackground.Length == 0) { mouseOverBackground = defaultMouseOverBackground; }
if (mouseOverBorderBrush.Length == 0) { mouseOverBorderBrush = defaultMouseOverBorderBrush; }
if (mouseOverForeground.Length == 0) { mouseOverForeground = defaultMouseOverForeground; }
// Pressed
string defaultPressedBackground = "#C4E5F6";
string defaultPressedBorderBrush = "#2C628B";
string defaultPressedForeground = "Black";
string pressedBackground = thePressedBackground;
string pressedBorderBrush = thePressedBorderBrush;
string pressedForeground = thePressedForeground;
if (pressedBackground == null) { pressedBackground = ""; }
if (pressedBorderBrush == null) { pressedBorderBrush = ""; }
if (pressedForeground == null) { pressedForeground = ""; }
if (pressedBackground.Length == 0) { pressedBackground = defaultPressedBackground; }
if (pressedBorderBrush.Length == 0) { pressedBorderBrush = defaultPressedBorderBrush; }
if (pressedForeground.Length == 0) { pressedForeground = defaultPressedForeground; }
// Disabled
string defaultDisabledBackground = "#F4F4F4";
string defaultDisabledBorderBrush = "#ADB2B5";
string defaultDisabledForeground = "#83838C";
string disabledBackground = theDisabledBackground;
string disabledBorderBrush = theDisabledBorderBrush;
string disabledForeground = theDisabledForeground;
if (disabledBackground == null) { disabledBackground = ""; }
if (disabledBorderBrush == null) { disabledBorderBrush = ""; }
if (disabledForeground == null) { disabledForeground = ""; }
if (disabledBackground.Length == 0) { disabledBackground = defaultDisabledBackground; }
if (disabledBorderBrush.Length == 0) { disabledBorderBrush = defaultDisabledBorderBrush; }
if (disabledForeground.Length == 0) { disabledForeground = defaultDisabledForeground; }
string mainButtonStyleXAML = @"<Style xmlns='http://schemas.microsoft.com/winfx/2006/xaml/presentation' xmlns:x='http://schemas.microsoft.com/winfx/2006/xaml' TargetType=""Button"">
<Setter Property=""Template"">
<Setter.Value>
<ControlTemplate TargetType=""ButtonBase"">
<Border
BorderThickness=""{TemplateBinding Border.BorderThickness}""
BorderBrush=""{TemplateBinding Border.BorderBrush}""
Background=""{TemplateBinding Panel.Background}""
Name=""BorderMain""
CornerRadius=""{CornerRadius}""
SnapsToDevicePixels=""True"">
<ContentPresenter
RecognizesAccessKey=""True""
Content=""{TemplateBinding ContentControl.Content}""
ContentTemplate=""{TemplateBinding ContentControl.ContentTemplate}""
ContentStringFormat=""{TemplateBinding ContentControl.ContentStringFormat}""
Name=""ContentPresenterMain""
Margin=""{TemplateBinding Control.Padding}""
HorizontalAlignment=""{TemplateBinding Control.HorizontalContentAlignment}""
VerticalAlignment=""{TemplateBinding Control.VerticalContentAlignment}""
SnapsToDevicePixels=""{TemplateBinding UIElement.SnapsToDevicePixels}""
Focusable=""False"" />
</Border>
<ControlTemplate.Triggers>
<!-- Default -->
<Trigger Property=""Button.IsDefaulted"" Value=""True"">
<Setter Property=""Border.BorderBrush"" TargetName=""BorderMain"">
<Setter.Value>
<DynamicResource
ResourceKey=""{x:Static SystemColors.HighlightBrushKey}"" />
</Setter.Value>
</Setter>
</Trigger>
<!-- Mouse Over -->
<Trigger Property=""UIElement.IsMouseOver"" Value=""True"">
<Setter Property=""Panel.Background"" TargetName=""BorderMain"">
<Setter.Value>
<SolidColorBrush>{MouseOverBackground}</SolidColorBrush>
</Setter.Value>
</Setter>
<Setter Property=""Border.BorderBrush"" TargetName=""BorderMain"">
<Setter.Value>
<SolidColorBrush>{MouseOverBorderBrush}</SolidColorBrush>
</Setter.Value>
</Setter>
<Setter Property=""TextElement.Foreground"" TargetName=""ContentPresenterMain"">
<Setter.Value>
<SolidColorBrush>{MouseOverForeground}</SolidColorBrush>
</Setter.Value>
</Setter>
</Trigger>
<!-- Pressed -->
<Trigger Property=""ButtonBase.IsPressed"" Value=""True"">
<Setter Property=""Panel.Background"" TargetName=""BorderMain"">
<Setter.Value>
<SolidColorBrush>{PressedBackground}</SolidColorBrush>
</Setter.Value>
</Setter>
<Setter Property=""Border.BorderBrush"" TargetName=""BorderMain"">
<Setter.Value>
<SolidColorBrush>{PressedBorderBrush}</SolidColorBrush>
</Setter.Value>
</Setter>
<Setter Property=""TextElement.Foreground"" TargetName=""ContentPresenterMain"">
<Setter.Value>
<SolidColorBrush>{PressedForeground}</SolidColorBrush>
</Setter.Value>
</Setter>
</Trigger>
<!-- Disabled -->
<Trigger Property=""UIElement.IsEnabled"" Value=""False"">
<Setter Property=""Panel.Background"" TargetName=""BorderMain"">
<Setter.Value>
<SolidColorBrush>{DisabledBackground}</SolidColorBrush>
</Setter.Value>
</Setter>
<Setter Property=""Border.BorderBrush"" TargetName=""BorderMain"">
<Setter.Value>
<SolidColorBrush>{DisabledBorderBrush}</SolidColorBrush>
</Setter.Value>
</Setter>
<Setter Property=""TextElement.Foreground"" TargetName=""ContentPresenterMain"">
<Setter.Value>
<SolidColorBrush>{DisabledForeground}</SolidColorBrush>
</Setter.Value>
</Setter>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>";
// Replace values
mainButtonStyleXAML = mainButtonStyleXAML.Replace("{CornerRadius}", cornerRadius.ToString());
mainButtonStyleXAML = mainButtonStyleXAML.Replace("{MouseOverBackground}", mouseOverBackground);
mainButtonStyleXAML = mainButtonStyleXAML.Replace("{MouseOverBorderBrush}", mouseOverBorderBrush);
mainButtonStyleXAML = mainButtonStyleXAML.Replace("{MouseOverForeground}", mouseOverForeground);
mainButtonStyleXAML = mainButtonStyleXAML.Replace("{PressedBackground}", pressedBackground);
mainButtonStyleXAML = mainButtonStyleXAML.Replace("{PressedBorderBrush}", pressedBorderBrush);
mainButtonStyleXAML = mainButtonStyleXAML.Replace("{PressedForeground}", pressedForeground);
mainButtonStyleXAML = mainButtonStyleXAML.Replace("{DisabledBackground}", disabledBackground);
mainButtonStyleXAML = mainButtonStyleXAML.Replace("{DisabledBorderBrush}", disabledBorderBrush);
mainButtonStyleXAML = mainButtonStyleXAML.Replace("{DisabledForeground}", disabledForeground);
StringReader mainButtonStyleXAMLStringReader = new StringReader(mainButtonStyleXAML);
XmlReader mainButtonStyleXAMLXMLReader = XmlReader.Create(mainButtonStyleXAMLStringReader);
Style mainButtonStyle = (Style)XamlReader.Load(mainButtonStyleXAMLXMLReader);
toStyle.Style = mainButtonStyle;
}
catch (Exception ex)
{
MessageBox.Show(
"Error at 'SetButtonCornerRadiusAndTriggerStyling'" +
Environment.NewLine + Environment.NewLine +
ex.Message,
"Error",
MessageBoxButton.OK,
MessageBoxImage.Error);
}
}
所以我不得不将 XAML 放入代码中，因为 FrameworkElementFactory 显然已被弃用。
MSDN:
https://msdn.microsoft.com/en-us/library/system.windows.frameworkelementfactory(v=vs.110).aspx
备注下:
"This class is a deprecated way to programmatically create templates, which are subclasses of FrameworkTemplate such as ControlTemplate or DataTemplate; not all of the template functionality is available when you create a template using this class. The recommended way to programmatically create a template is to load XAML from a string or a memory stream using the Load method of the XamlReader class."
关于c# - 如何在代码中设置按钮的内部属性？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/51321243/