How to change the annotation content of a node using context menu in WPF Diagram (SfDiagram)?

WPF Diagram (SfDiagram) provides support to create custom menu items and sub-menu items using the DiagramMenuItem class. To change the annotation content of a Node using the context menu item, you simply need to create an instance of a TextBox and a custom menu item, then add the TextBox as the content of the custom menu item. When changing the textbox text value, it dynamically updates the annotation content of the node using the TextChanged event of TextBox for the selected node.

Code snippet:

//Initialize the new custom Menu item
var TextBoxMenuItem = new DiagramMenuItem()
{
   Content = "TextBox Menu Items",
};

//Initializing TextBoxe
TextBox textBox = new TextBox() { Text = "One" };
//Adding TextChanged event
textBox.TextChanged += textBox_TextChanged;

//Initialize the sub-menu items.
var TextBoxSubMenuItem = new DiagramMenuItem()
{
   //setting menu item content as text box
   Content = textBox
};

//Adding textbox menu item into diagram default menus.
Diagram.Menu.MenuItems.Add(TextBoxMenuItem);
//Initialize the menu items collection to the Textbox menu item
TextBoxMenuItem.Items = new ObservableCollection<DiagramMenuItem>();
//Adding SubMenu items to the collection of TextBoxMenuItem.
TextBoxMenuItem.Items.Add(TextBoxSubMenuItem);

View Sample in GitHub

Conclusion

I hope you enjoyed learning about How to add textbox as a sub-menu item in the WPF Diagram(SfDiagram).
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