Raise an event of a class from a different class in C#

Question

I have a class, EventContainer.cs, which contains an event, say:

public event EventHandler AfterSearch;

I have another class, EventRaiser.c

Answer 1

It looks like you're using the Delegate pattern. In this case, the AfterSearch event should be defined on the EventRaiser class, and the EventContainer class should consume the event:

In EventRaiser.cs

public event EventHandler BeforeSearch;
public event EventHandler AfterSearch;

public void ExecuteSearch(...)
{
    if (this.BeforeSearch != null)
      this.BeforeSearch();

    // Do search

    if (this.AfterSearch != null)
      this.AfterSearch();
}

In EventContainer.cs

public EventContainer(...)
{
    EventRaiser er = new EventRaiser();

    er.AfterSearch += this.OnAfterSearch;
}

public void OnAfterSearch()
{
   // Handle AfterSearch event
}