What I wrote in my previous response works, but a more elegant solution that I'd forgotten about is to use a "context" class, which "can be seen as a bucket to pass information around" - see https://stackoverflow.com/questions/6145091/the-term-context-in-programming.
1. Create a static class with a static public property anywhere you like
namespace ContextMenuDemo
{
public static class Context
{
public static int ClickedIndex = default;
}
}
2. Set the property in the OnClick event handler for the menu
protected override void OnClick(int index)
{
Context.ClickedIndex = index;
}
3. Access the property wherever required, e.g.,
private void ShowContextMenu(MapPoint clickedPoint)
{
var contextMenu = FrameworkApplication.CreateContextMenu("ContextMenu_Menus_DynamicMenu", () => ClientPoint);
contextMenu.Closed += (returnObject, routedEventArgs) =>
{
MessageBox.Show(Context.ClickedIndex.ToString());
};
}
It's a little confusing, but the word "Context" as the class name has nothing to do with the word "Context" in the namespace name or the menu type. You can call the class whatever you like. I just wanted to stick to the terminology describing the purpose of the class.
I also tried a couple of other options without success:
1. Accessing a context menu class property via the objects passed to the menu closed event handler;
2. Using a delegate passed to the menu class instance to set a property on the class in which the menu is created.
