Set content of button in WinUI 3 to a StackPanel

Question

Hello people of Stack Overflow. Recently, I've been working on a project in WinUi3, and I haven't been able to find a way to set the content of a Button to a StackPanel.

In WPF you could just do:

myButton.Content = myStackPanel

But in WinUi3, there is no Content property in a button. Here is a sample of the code I'm using:

StackPanel elementPanel = new StackPanel();
elementPanel.Orientation = Orientation.Horizontal;
element.Content = elementPanel; // This doesn't work.
foreach (var item in child.ChildNodes)
{
    if (item.NodeType == HtmlNodeType.Element || item.NodeType == HtmlNodeType.Comment)
    {
        parseElement(item, elementPanel);
    }
}

You haven't shown where you got "element" from; or how it's defined. Button inherits from ContentControl. Anything that does, has a Content property. A TextBlock doesn't have a "Content" property; it has a Text property instead. Some UI element do not have a Content or Text property and instead have a "Child" property for hosting "content" (small c). — Gerry Schmitz
– Gerry Schmitz, Commented Nov 10 at 15:38

Andrew KeepCoding · Accepted Answer · 2025-11-10 23:59:20Z

1

Check the doc and the guidlines, the Button control does have the Content property.

For example:

public sealed partial class MainWindow : Window
{
    public MainWindow()
    {
        InitializeComponent();

        var elementPanel = new StackPanel();
        elementPanel.Children.Add(new TextBlock { Text = "Hello, World!" });

        var element = new Button();
        element.Content = elementPanel;

        this.Content = element;
    }
}

UPDATE

Based on your comment, it seems that you don't know the type of the element. How about something like this?

private static void SetTextContent(FrameworkElement element, string text)
{
    switch (element)
    {
        // Includes Button, CheckBox, RadioButton, etc.
        case ContentControl contentControl:
            contentControl.Content = text;
            break;
        case TextBlock textBlock:
            textBlock.Text = text;
            break;
        case TextBox textBox:
            textBox.Text = text;
            break;
        // Add more cases as needed for other FrameworkElement types.
        default:
            throw new NotSupportedException($"Element type '{element.GetType().Name}' is not supported.");
    }
}

edited Nov 10 at 23:59

answered Nov 10 at 7:48

Andrew KeepCoding

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2 Comments

twn Nov 10 at 14:41

Strange. My element doesn't have the content property. I think my program is getting confused as the element isn't always a button, so sometimes it could be a TextBox, or a TextBlock which I'm guessing doesn't have this property?

Andrew KeepCoding Nov 11 at 2:04

You need to elaborate more on what that element is. Anyway, I updated my answer. That might help.

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