Notification when my form is fully loaded in C# (.Net Compact Framework)?

Question

I have a form in my application and I want to do some processing when my form has been

Fully loaded but I have no event or something which I can bind to when load is finished.

Does anyone has any idea, how can I do this?

Solution 1

What exaclty mean "fully loaded" ? Do you mean, the "Load" event was successfully proceeded?

You can do this:

public class MyForm : Form {
    protected override void OnLoad( EventArgs e ) {
        // the base method raises the load method
        base.OnLoad( e );

        // now are all events hooked to "Load" method proceeded => the form is loaded
        this.OnLoadComplete( e );
    }

    // your "special" method to handle "load is complete" event
    protected virtual void OnLoadComplete ( e ) { ... }
}

But if you mean "fully loaded" the "form is loaded AND shown" you need override the "OnPaint" method too.

public class MyForm : Form {
    private bool isLoaded;
    protected override void OnLoad( EventArgs e ) {
        // the base method raises the load method
        base.OnLoad( e );

        // notify the "Load" method is complete
        this.isLoaded = true;
    }

    protected override void OnPaint( PaintEventArgs e ) {
        // the base method process the painting
        base.OnPaint( e );

        // this method can be theoretically called before the "Load" event is proceeded
        // , therefore is required to check if "isLoaded == true"
        if ( this.isLoaded ) {
            // now are all events hooked to "Load" method proceeded => the form is loaded
            this.OnLoadComplete( e );
        }
    }

    // your "special" method to handle "load is complete" event
    protected virtual void OnLoadComplete ( e ) { ... }
}

Solution 2

I think the OnLoad event isn't really what you want, as it occurs before the form is displayed. You can use Application.Idle with OnLoad to make an OnLoaded event though:

protected override void OnLoad(EventArgs args)
{
    Application.Idle += new EventHandler(OnLoaded);
}

public void OnLoaded(object sender, EventArgs args)
{
   Application.Idle -= new EventHandler(OnLoaded);
   // rest of your code 
}