how to close form2 ?

Question

1.00/5 (2 votes)

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this code wil show form2 but what i want is , when i click in listbox "close form 2"
the form 2 will not close !

C#

private void button1_Click(object sender, EventArgs e)
{
Form2 myForm;
myForm = new Form2();
myForm.Show();
}

C#

private void listBox5_Click_1(object sender, EventArgs e)
{
                   if (listBox5.Text == ("close form 2"))
                     {
                         


                         Form2 myForm;
                         myForm = new Form2();
                         myForm.close();// but its not close it D:
}
}

Posted 13-Feb-12 5:50am

majid5487

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Comments

Sergey Alexandrovich Kryukov 13-Feb-12 12:10pm

The question shows such a big ignorance, that it may require starting to learn programming from the very beginning. Either start it now, not wasting a minute, or give up.

Good luck.
--SA

3 solutions

Solution 3

You're declaring a new form in the listBox5_Click method, so it's not the same form as the one initially created.

You need to create Form2 as a variable (e.g. myForm) that can be accessed throughout your base class

so under button1_click you only need to show the form
myform.Show();

and under listBox5_Click it would be
myform.Close();

You would obviously have to instantiate your form first somewhere else (instructor perhaps)

Posted 13-Feb-12 5:58am

W.Aaron Skinner

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Christian Graus · Accepted Answer · 2012-02-13T05:56:00

You should read a book on OO development. This code does what you ask. button1 creates a form and shows it. listbox5 creates a new form, and closes that ( only it never opened ). I also think that .close will not compile, it's .Close. But, either way, you need to keep a reference to the Form2 instance you create and close THAT, not a random new instance that has nothing to do with the form you want to close.

OriginalGriff · Accepted Answer · 2012-02-13T05:58:00

Solution 2

You can't close it like that - you have to close the instance of Form2 that is actually showing.
Try this:

C#

private Form2 myForm;
private void button1_Click(object sender, EventArgs e)
   {
   myForm = new Form2();
   myForm.Show();  
   }

private void listBox5_Click_1(object sender, EventArgs e)
   {
   if (listBox5.Text == ("close form 2"))
      {
      myForm.Close();
      }
   }

Posted 13-Feb-12 5:58am

OriginalGriff

Updated 13-Feb-12 7:00am

v2

Comments

fjdiewornncalwe 13-Feb-12 12:40pm

Of course. +5.

Shahin Khorshidnia 13-Feb-12 12:58pm

+5