Question

Say I want to open a new form..

TestForm test = new TestForm();  

What is the good way to close it? More precisely, is only calling close() ok? Should I use the using() {} so dispose() is called ? And finally, suppose there is a dialog that should have only one instance of a dialog opened, is there a well ‘known’ pattern? I’ve got different choices such as storing it in a static field, and null-‘ing’ it when it is closed..

Thanks

Answer 1

Well in terms of your single instance dialog (if it’s modal you don’t have to worry) you can make the constructor private and provide a public static method to access the form.

public class MyForm : Form {     protected MyForm()     {     }      protected int MyValue { get; set; }      public static int GetResult()     {         using(MyForm myForm = new MyForm())         {             if(myForm.ShowDialog == DialogResult.OK)                 return myForm.MyValue;            }         return -1;     } } 

That would force calls to by in the form of..

int someValue = MyForm.GetResult();