How do I refresh form with timer?

Question

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C#

private void Form_Load(object sender, EventArgs e)
{
     timer1 = new System.Windows.Forms.Timer();
     timer1.Interval = 900000;//5 minutes
     timer1.Tick += new System.EventHandler(Timer1_Tick);
}

private void Button1_Click(object sender, EventArgs e)
{         
    if (!timer1.Enabled)
        timer1.Start();
}

private void Timer1_Tick(object sender, EventArgs e)
{
    //do whatever you want 
     RefreshMyForm();
}


private void RefreshMyForm()
{
    
    this.close();

   
    Graph1 graph = new Graph1();
    graph.Show();

    

}

What I have tried:

i try this code to refresh my from to close it and open new one bout when i use this code it open many form in the background

C#

private void RefreshMyForm()
        {
            this.Hide();
            var Graph1 = new Graph1();
            Graph1.Closed += (s, args) => this.Close();
            Graph1.Show();

        }

and

C#

private void RefreshMyForm()
        {
            this.Hide();
            Graph1 sistema = new Graph1();
            sistema.ShowDialog();
            this.Close();

        }

Posted 13-Feb-19 1:32am

el_tot93

Updated 13-Feb-19 20:21pm

v2

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OriginalGriff · Answer 1 · 2019-02-13T02:02:00

Solution 1

The problem is that if this is your main form, then closing it will end your application. Which will close all child forms as well.

Why do you want to close forms, and which ones?

If it's your Graph to want to "refresh" then your "close and reopen" method could work:

private Graph myGraph = null;
private void RefreshMyForm()
{
    if (myGraph != null) 
    {
        myGraph.Close;
        myGraph = null;
    }
    myGraph = new Graph1();
    myGraph.FormClosing += new Graph_Closing;
    myGraph.Show();
}
private void Graph_Closing(object sender, EventArgs e)
{
    myGraph = null;
}

And just the graph will close and reopen.

But a better way is to add a Refresh method to your Graph form, and call that so that it can refresh itself.

Posted 13-Feb-19 2:02am

OriginalGriff

Comments

el_tot93 13-Feb-19 8:16am

it not working the are many red line

OriginalGriff 13-Feb-19 8:39am

I'd have thought by now you would have remembered that we can't see what you actually typed, let alone what the compiler errors were ...

BTW: you are turning into quite a Help Vampire: you are going to get nowhere in this business unless you start looking at problems and trying to think them through for yourself instead of just trying to get others to fix them for you without any effort.

TheRealSteveJudge 13-Feb-19 8:41am

It's a complete waste of time..

OriginalGriff 13-Feb-19 8:47am

I'm starting to think that ... he doesn't read what you say, he doesn't seem to learn from anything, and he doesn't appear to have any idea what he is doing. :sigh:

TheRealSteveJudge 13-Feb-19 9:07am

Exactly. This is what I also thought yesterday when I was trying to help.

el_tot93 14-Feb-19 0:15am

first we are helping because we want to help not to wist awar time we love do that however thx for you time i don't want any thing you don't know what happened with me to say that

OriginalGriff 14-Feb-19 2:13am

No, we don't - we only get what you type here, and that shows a pattern of ignoring anything you don't want to read, not learning from solutions you are given, guessing what to do, and seemingly wanting everything done for you.
That isn't rude by the way - though I can do that as well if necessary - that's a pattern we have seen many, many times before (mostly in lazy students and those who have blagged their way into a job they are incapable of doing). And if you look, you will see that I'm not the only one who has noticed it.

Seriously: you need to look at what you are doing and learn from your mistakes, not ignore them, grab code at random, and try to get someone else to fix it. If you don't learn, you'll never be able to do this stuff on your own - and repeating the same mistake over and over is a strong indicator that you aren't even trying to learn why it's a mistake!

el_tot93 14-Feb-19 2:21am

ok i see that to many of them doing that so can you look to my update

OriginalGriff 14-Feb-19 4:31am

And what of what I said above have you actually listened to?
You're doing it again!