Question

I have a User class with functions to Login() and Logout() and GetData(). There’s a UserChanged event, it fires when either of these functions are called.

I have UserControls on my Default.aspx (they’re added dynamically).

I have a UserControl named Login.ascx. It provides the functionality to use the User class: you can Login / Logout here. I have an ****EventHandler* for **UserChanged***** (if I don’t have one, it will fail with a object not found exception).

I need to alert the other UserControls about the changes to the user’s state.
I somehow need to pass the UserChanged event from Login.ascx to its Parent, Default.aspx.

How can I do this?

Answer 1

Login.ascx.cs

public delegate void OnUserChangedHandler(object sender);
public OnUserChangedHandler OnUserChanged;

private void RaiseUserChangedEvent() //Call this method when the user changes
{
    //UserChanged Event
    if (OnUserChanged != null)
    {
        OnUserChanged(this);
    }
}

Default.aspx.cs

protected override void OnInit(EventArgs e)
{
    InitializeComponent();
    base.OnInit(e);
}

private void InitializeComponent()
{
    loginControl.OnUserChanged += OnUserChanged;
}

private void OnUserChanged(object sender)
{
    //Code here to do something with other controls on this page
}