Update. Form(1) opens another form(2). When Form(2) closes, Form(1) does method. Need Help!

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Hi I am Computer Science Student. Learning about C#, delegates and events.

I have made a windows Form(1) that has a button that opens up another form(2). I want to be able to call a refresh method on Form(1) after form(2) closes. I am currently messing with the event AfterClosing on form(2), but I dont know how to call a method on form(1) from form(2).

Any suggestion or any ideas that people can help with?

public partial class Form1 : Form //Windows form
private void button5_Click(object sender, EventArgs e) //Opens up webbrowser form
{
Form2 form2 = new Form2();
form2.Show();
}

public partial class Form2 : Form //Windows form with web browser
{
   public Form2()
   {
      InitializeComponent();
   }
private void Form2_FormClosing(object sender, FormClosingEventArgs e)
   {
      //Does refresh on form1
   }
}

Thanks in Advance.

Posted 27-Jun-11 8:03am

Member 8015046

Updated 27-Jun-11 18:54pm

Ramalinga Koushik

v2

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Comments

Uday P.Singh 27-Jun-11 14:08pm

what do you want to do with this code? where is your refresh method?

Uday P.Singh 27-Jun-11 14:21pm

but where are you using delegates?

P.Metaxas 11-Dec-18 16:37pm

Thanks! You saved my project!

3 solutions

Solution 3

I would define the Form2_FormClosing() handler in the Form1 class - that way Form2 doesn't need to know anything about Form1, and Form1 can Refresh() itself. Register the handler on Form1 after you create Form2, typically before you show it.

<Edit>
Argh, OriginalGriff beat me to it!
<\Edit>

Dybs

Posted 27-Jun-11 8:24am

dybs

Updated 27-Jun-11 8:27am

v2

Comments

OriginalGriff 27-Jun-11 14:44pm

Sorry about that! Have a 5 anyway... :laugh:

Solution 2

You can call a method on from1 when from2 closes like this:

in Form1 write this:

C#

public void MyrefeshMethod()
        {
            MessageBox.Show("refreshed");
        }

and in the Form2 closed event write this:

C#

private void Form2_FormClosed(object sender, FormClosedEventArgs e)
        {
            Form1 frm = new Form1();
           
            frm.MyrefeshMethod();

        }

hope this helps :)

for further queries comment here!!

Posted 27-Jun-11 8:19am

Uday P.Singh

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OriginalGriff · Accepted Answer · 2011-06-27T08:19:00

Solution 1

Easy peasy: when you create the Form2 instance, hook into the FormClosing event. You will then automatically get executed, and can refresh whatever you need to. That way, Form2 does not need to know anything about form1.

private void button5_Click(object sender, EventArgs e) //Opens up webbrowser form
   {
   Form2 form2 = new Form2();
   form2.FormClosing += new FormClosingEventHandler(ChildFormClosing);
   form2.Show();
   }
private void ChildFormClosing(object sender, FormClosingEventArgs e)
   {
   ...
   }

Posted 27-Jun-11 8:19am

OriginalGriff

Comments

Member 8015046 27-Jun-11 14:40pm

THAT IS COOL! Thanks so much!

OriginalGriff 27-Jun-11 14:44pm

You're welcome!

[no name] 28-Jun-11 0:54am

Good Stuff OriginalGriff.

Ankur^\m/ 28-Jun-11 1:02am

Why are you updating question(s) that was asked, answered and ACCEPTED 10 hours back?
It brings the question in the active list and annoys answerer. :doh: