Question

I have a form which will open a new form when one button (form1button) is clicked. And on the child form there will be another button ‘form2button’. Now if I click this form2button the new form2 should be disposed. But because the form2 object is created here in form1 class method, I cannot dispose that object in form2 class method (fom2buttonclick). So I used static to get my work done as in the following psuedo code.

Form1:

class Form1 : Form {     static Form2 f2;      public void Form1_buttonclick(object sender, EventArgs e)     {         f2 = new Form2();     }      public void Disposef2()     {         f2.Dispose();     } } 

Form2:

class Form2 : Form {     public void Form2_buttonclick(object sender, EventArgs e)     {         Form1 f1 = new Form1();         f1.Disposef2();     } } 

Is there any other better way to do it. Or C# design itself doesnot provide an alternative mechanism. I am new to C#.Please help me out..

Edit

I want to close (dispose explicitely) form2 object which is created in form1 class when button on form2 is clicked. This edit is to give some more clarity.

Answer 1

If the two forms doesn’t have a parent-dialog type of relationship, you might just want to hook into the Disposed event on the subform to get notified when it closes.

public partial class Form1 : Form {     private Form2 _Form2;      public Form1()     {         InitializeComponent();     }      private void button1_Click(object sender, EventArgs e)     {         if (_Form2 != null)             _Form2.Dispose();          _Form2 = new Form2();         _Form2.Disposed += delegate         {             _Form2.Dispose();             _Form2 = null;         };         _Form2.Show();     } } 

Then all you have to do in Form2 is simply to close it:

public partial class Form2 : Form {     public Form2()     {         InitializeComponent();     }      private void button1_Click(object sender, EventArgs e)     {         Close();     } }