How to open a popup menu when a button is clicked?

Question

I have a button with an Image as its content in a toolbar. I would like this button to open a menu beneath it when clicked. How?

Answer 1

i found this two solutions after searching for it:

1) Split Button in WPF

2) DropDownButtons in WPF

the second solution is my favorit (source taken from the website by Andrew Wilkinson)

public class DropDownButton : ToggleButton
{
  // *** Dependency Properties ***

  public static readonly DependencyProperty DropDownProperty =
    DependencyProperty.Register("DropDown",
                                typeof(ContextMenu),
                                typeof(DropDownButton),
                                new UIPropertyMetadata(null));

  // *** Constructors *** 

  public DropDownButton() {
    // Bind the ToogleButton.IsChecked property to the drop-down's IsOpen property 

    Binding binding = new Binding("DropDown.IsOpen");
    binding.Source = this;
    this.SetBinding(IsCheckedProperty, binding);
  }

  // *** Properties *** 

  public ContextMenu DropDown {
    get { return (ContextMenu)this.GetValue(DropDownProperty); }
    set { this.SetValue(DropDownProperty, value); }
  }

  // *** Overridden Methods *** 

  protected override void OnClick() {
    if (this.DropDown != null) {
      // If there is a drop-down assigned to this button, then position and display it 

      this.DropDown.PlacementTarget = this;
      this.DropDown.Placement = PlacementMode.Bottom;

      this.DropDown.IsOpen = true;
    }
  }
}

usage

hope that helps you...