如何使用代码隐藏创建 StackPanel -> 边框 -> 背景

我正在尝试设置 a 的属性TreeViewItem -> StackPanel在 C# 中就像这个问题 https://stackoverflow.com/questions/8203316/adding-content-to-a-treeviewitem-programmatically?lq=1。在我到达尝试编辑的部分之前，这似乎很有意义Background in my Border. Borders have Background其中的对象，但对于我的生活，我无法设置颜色或任何东西。这似乎不一致，因为我可以添加Content to a Label简单地说，Content = "Title".

无论如何，这是我的代码：

public static TreeViewItem childNode = new TreeViewItem() //Child Node 
{
     Header = new StackPanel
     {
         Orientation = Orientation.Horizontal,
         Children =
         {
             new Border {
                 Width = 12,
                 Height = 14,
                 Background = ? //How do I set the background?
             },
             new Label {
                 Content = "Child1"
             }
         }
     }
}; 

PS-我在尝试添加时遇到同样的问题BorderBrush

谢谢你！

Background属性接受Brush。因此，代码可以设置颜色如下：

MyLabel.Background = Brushes.Aquamarine;

Or this:

SolidColorBrush myBrush = new SolidColorBrush(Colors.Red);
MyLabel.Background = myBrush;

要设置任何颜色，您可以使用BrushConverter:

BrushConverter MyBrush = new BrushConverter();

MyLabel.Background = (Brush)MyBrush.ConvertFrom("#ABABAB");

将属性设置为LinearGradientBrush在代码中：

LinearGradientBrush myBrush = new LinearGradientBrush();

myBrush.GradientStops.Add(new GradientStop(Colors.Yellow, 0.0));
myBrush.GradientStops.Add(new GradientStop(Colors.Green, 0.5));
myBrush.GradientStops.Add(new GradientStop(Colors.Red, 1.0));

MyLabel.Background = myBrush;

对于你来说它看起来像这样：

private void Window_ContentRendered(object sender, EventArgs e)
{
    TreeViewItem childNode = new TreeViewItem()
    {
        Header = new StackPanel
        {
            Orientation = Orientation.Horizontal,

             Children =
             {
                 new Border
                 {
                     Width = 12,
                     Height = 14,
                     Background = Brushes.Yellow, // Set background here
                 },

                 new Label 
                 {
                     Content = "Child1", 
                     Background = Brushes.Pink, // Set background here
                 }
             }
        }
    };

    MyTreeView.Items.Add(childNode);
}