just a quick question. First of all, let me ve开发者_如何转开发rify that I have the correct meaning of a function pointer. In the case of C#, a function pointer is basically just an event function am i right?
second, consider the following snippet:
public FormAnimator(Form form)
{
this.m_Form = form;
this.m_Form.Load += new EventHandler(m_Form_Load);
this.m_Form.VisibleChanged += new EventHandler(m_Form_VisibleChanged);
this.m_Form.Closing += new CancelEventHandler(m_Form_Closing);
}
where m_Form is a private variable of type
//The form to be animated.
private Form m_Form;
Heres how the class is instantiated:
public partial class toastform : Form
{
public toastform(skImage ic) : this() {
//Attach this form to the Formanimator.
//The FormAnimator now has a reference to this toastform.
//When the load() of this form is invoked, the Form animator intercepts it and displays the form.
this.m_Animator = new FormAnimator(this, FormAnimator.AnimationMethod.Slide, FormAnimator.AnimationDirection.Up, 400);
}
so when i create a new toastform (with the something = new toastform();) and call the Show() the show method SHOULD be the one from the form animator. Now, when the toastform closes, how do I make sure the FormAnimator object is also destoryed.. if someone can please explain the full story of what is happening, i'd appreciate that. what i mean is that .. do the toastform class, and the formanimator class both point to the same object, is my lingo right when i say form animator "intercepts" the taostform's events and so on..
thanks
tldr: I just need to know if I need to manually remove handlers for the events in Formanimator class.
In your Dispose
function, you should detach your function references.
protected override Dispose(bool disposing)
{
....
this.m_Form.Load -= new EventHandler(m_Form_Load);
this.m_Form.VisibleChanged -= new EventHandler(m_Form_VisibleChanged);
this.m_Form.Closing -= new CancelEventHandler(m_Form_Closing);
}
Or, you can use Weak References.
Here is a very, very good article on weak references:
http://diditwith.net/PermaLink,guid,aacdb8ae-7baa-4423-a953-c18c1c7940ab.aspx
You need to. The garbage collection runs at some unpredictable time. The object which is not referenced will be garbage collected, but you never know when.
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