使用DialogResult.Cancel的优点

Question

What would the advantage of using:

DialogResult.Cancel

Over using:

this.Close()

Would it be just so that you would be able to determine that the user has selected Cancel ?

Answer 1

Those consuming your interface, if showing the form with ShowDialog , would get a result. They would know the user pressed Cancel .

As an aside. You can set the Form properties AcceptButton and CancelButton . Then, if the form is shown with ShowDialog , when they are clicked the base Form will set the DialogResult and thus the Form will close on its own.

Answer 2

You can use it value for this kind of purpose

var result = form.ShowDialog();
if (result == DialogResult.OK) 
{

}
else if (result == DialogResult.Cancel) 
{
  //perform soem operation
}

So if you want to perform some operation on the result of dialog you can use this.

Note :

Both of this ok and cancel operation on dialog close your dialog, and by catching ok and cancel value you can perform extra task as given in above example.