Question

我尝试从代码添加按钮并向其添加触发器和设置器。我喜欢创建这样的按钮：

<Button Height="25" Width="100" Name="TestColorButton" Margin="10, 5, 0, 0">
    <TextBlock Text="{Binding Text, ElementName=ColorTextBox}"></TextBlock>
        <Button.Style>
            <Style TargetType="{x:Type Button}">
                <Setter Property="Background" Value="{Binding Fill, ElementName=NormalRectangle}"/>
                <Setter Property="Template"> <!-- I need this setter -->
                    <Setter.Value>
                        <ControlTemplate TargetType="{x:Type Button}">
                            <Border Background="{TemplateBinding Background}">
                                <ContentPresenter HorizontalAlignment="Center" VerticalAlignment="Center"/>
                                                    </Border>
                         </ControlTemplate>
                     </Setter.Value>
                 </Setter>
             <Style.Triggers>
         <Trigger Property="IsMouseOver" Value="True">
             <Setter Property="Background" Value="{Binding Fill, ElementName=MouseOverRectangle}"/>
        </Trigger>
        <Trigger Property="IsPressed" Value="True">
            <Setter Property="Background" Value="{Binding Fill, ElementName=ClickRectangle}"></Setter>
        </Trigger>
              </Style.Triggers>
           </Style>
       </Button.Style>
    </Button>

我找到了除了一个二传手之外的所有事情。我通过评论检查了一下。我尝试了很多次，我只得到这样的东西：

ContentPresenter contentPresenter = new ContentPresenter
        {
            HorizontalAlignment = HorizontalAlignment.Center,
            VerticalAlignment = VerticalAlignment.Center
        };

        Border border = new Border();
        var binding = new Binding("Background");
        binding.RelativeSource = new RelativeSource(RelativeSourceMode.Self);
        BindingOperations.SetBinding(border, BackgroundProperty, binding);
        border.Child = contentPresenter;

        ControlTemplate controlTemplate = new ControlTemplate(typeof (Button));
        Setter templateSetter = new Setter(TemplateProperty, controlTemplate);

        style.Setters.Add(templateSetter);

我知道它不起作用，但我不知道如何以不同的方式做到这一点。

Answer 1

模板可以轻松地通过代码添加。这里有一个带标签的例子。

// create the label with some context
var lbl = new Label() { DataContext = new ImageData(imagePath) };

// control template i want to put on the label
ControlTemplate labelLayout = new ControlTemplate();

// will be my main container that will be by template later on
FrameworkElementFactory grdContainer = new FrameworkElementFactory(typeof(Grid));
grdContainer.Name = "myContainer";

// another element but ill put it in the grid (template)
FrameworkElementFactory myImage = new FrameworkElementFactory(typeof(Image));

// some bindings and setters
myImage.SetBinding(Image.SourceProperty, new Binding("ImagePath"));
myImage.SetValue(Image.HorizontalAlignmentProperty, HorizontalAlignment.Center);
myImage.SetValue(Image.HeightProperty, height);
myImage.SetValue(Image.WidthProperty, double.NaN);
myImage.SetValue(Image.SnapsToDevicePixelsProperty, true);

// add the image to the grid
grdContainer.AppendChild(myImage);

// set the visual layout of the template to be the grid (main container)
labelLayout.VisualTree = grdContainer;

// set the template (line you are looking for mostly)
lbl.Template = labelLayout;

wpf - 从代码中添加setter

1 个答案: