代码后面的按钮边框粗细

Question

I am very new to wpf, and right now I am working with buttons, and so I want to change buttons border thickness, but from code behind not in XAML, and what I did was next:

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

The default border thickness for Buttons is 1 so nothing will change if you set it to 1.

To see a change just set it to something different:

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

Answer 2

Since the default button template don't have Border property, More information you can visit: here . So if you want a border around button you have to add your own style, Like:

<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>

In above code all properties like: BorderBrush , BorderThickness and Background are hard coded and you can't set these property from code behind. if you want to do so you have to write style like:

<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>

And apply this style like:

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

After that you can change those property of Border as your wish, For example:

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