[Caliburn.Micro] Passing Control Event to ShellView

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Introduction

In Caliburn.Micro, we have a series of supporting services for building presentation tiers. Among them is the EventAggregator, a service which supports in-process publish/subscribe. Here I explain how to pass (Publish) event from Control to Main Page (ShellView) and How to subscribe event in ShellviewModel.

Let’s start by having a look at the ItemClickEvent class:

First add ItemClickEvent class and write there:

public string ToDoItemDescription { get; set; }

public ItemClickEvent(string toDoItemDescription)
{
	ToDoItemDescription = toDoItemDescription;
}

After creating ItemClassEvent class, add new Item PageOneView which contains a Simple Button and add PageOneViewModel which contains Button click like:

public class PageOneViewModel : Conductor<screen>.Collection.OneActive
{
	public void ClickMe()
       {
       	IoC.Get<ieventaggregator>().Publish(new ItemClickEvent("Button Click"));
		// Here you can pass your custom value and variable in ItemClassEvent().
       }
} 

Finally ShellViewModel looks like:

namespace EventPassingToShellView
{
    [Export(typeof(IShell))]
    public class ShellViewModel : Conductor<screen>
    .Collection.OneActive, IShell, IHandle<itemclickevent>
    {
        public ShellViewModel()
        {
            ShowPageOne();
            IoC.Get<ieventaggregator>().Subscribe(this);

        }
        public void ShowPageOne()
        {
            ActivateItem(new PageOneViewModel());
        }
        
        #region IHandle<itemclickevent> Members

        public void Handle(ItemClickEvent message)
        {
		// Got message from  PageOneViewModel what ever you pass it.
           MessageBox.Show(message.ToDoItemDescription);
        }

        #endregion
    }
}   

Finally Project Structure looks like: