代码后面的按钮边框粗细

Question

我是wpf的新手，现在我正在使用按钮，所以我想改变按钮的边框粗细，但从代码后台不是XAML，我做的是下一步：

var converter = new System.Windows.Media.BrushConverter();
var brush = (Brush)converter.ConvertFromString("#83D744");
btn0.Background = System.Windows.Media.Brushes.Transparent; // This is applied to button
       btn0.BorderThickness = new Thickness(1); //Thickness wont apply to button I dont know why
        btn0.BorderBrush = brush; //This is also applied to button

Answer 1

按钮的默认边框厚度为1，因此如果将其设置为1，则不会发生任何更改。

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要查看更改，只需将其设置为不同的内容：

button.BorderThickness = new Thickness(1, 1, 1, 3);

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Answer 2

由于默认的按钮模板没有边框属性，更多信息可以访问：here。因此，如果你想在按钮周围添加一个边框，你必须添加你自己的样式，比如：

<Style x:Key="ButtonStyle" TargetType="{x:Type Button}">
   <Setter Property="Template">
      <Setter.Value>
         <ControlTemplate TargetType="{x:Type Button}">
            <Border x:Name="border" BorderBrush="Transparent" BorderThickness="0" Background="Transparent">
               <ContentPresenter HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" Margin="{TemplateBinding Padding}" RecognizesAccessKey="True" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" VerticalAlignment="{TemplateBinding VerticalContentAlignment}"/>
            </Border>
         </ControlTemplate>
      </Setter.Value>
   </Setter>
</Style>

在上面的代码中，像：BorderBrush，BorderThickness和Background这样的属性都是硬编码的，你不能从代码后台设置这些属性。如果你想这样做，你必须编写这样的风格：

<Style x:Key="ButtonStyle" TargetType="{x:Type Button}">
    <Setter Property="Template">
       <Setter.Value>
          <ControlTemplate TargetType="{x:Type Button}">
             <Border x:Name="border" BorderBrush="{TemplateBinding Property=BorderBrush}" BorderThickness="{TemplateBinding Property=BorderThickness}" Background="{TemplateBinding Property=Background}">
                <ContentPresenter HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" Margin="{TemplateBinding Padding}" RecognizesAccessKey="True" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" VerticalAlignment="{TemplateBinding VerticalContentAlignment}"/>
             </Border>
          </ControlTemplate>
       </Setter.Value>
    </Setter>
</Style>

并像这样应用此样式：

<Grid>
    <Button Name="btnNew" Style="{StaticResource ButtonStyle }" Width="200" Height="50" Click="Button_Click" />
</Grid>

之后，您可以根据自己的意愿更改边界的这些属性，例如：

btnNew.Background = Brushes.Black;
btnNew.BorderThickness = new Thickness(4, 5, 7, 9);
btnNew.BorderBrush = Brushes.Red;