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POC#: form switching, what based on timers events
 

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  1. POC#: form switching, what based on timers events
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    <p>I have some problems with switching forms in my applications. It have 2 forms: </p> <ul> <li>first: has one button for swith to second form;</li> <li>second: has timer for automatical switching to first form and button for manual switch to first form.</li> </ul> <p>If I click button, Application executes method <strong>logOut</strong> and it works. If it executes with events of timer - it doesn't work. I need help to understand why it doesn't work in this way?</p> <p>Code for first form</p> <pre><code>using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; namespace WindowsFormsApplication1 { public partial class Form1 : Form { private Form2 frmm2; public Form1() { InitializeComponent(); } private void button1_Click(object sender, EventArgs e) { frmm2 = new Form2(this); frmm2.Show(this); this.Hide(); } } } </code></pre> <p>Second form</p> <pre><code>using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; using System.Timers; namespace WindowsFormsApplication1 { public partial class Form2 : Form { private System.Timers.Timer tmr; private Form2 frm2; private Form1 frm1; public Form2(Form1 f1) { InitializeComponent(); tmr = new System.Timers.Timer(); tmr.Elapsed += new ElapsedEventHandler(OnTimedEvent); tmr.Interval = 10000; tmr.Enabled = true; frm1 = f1; frm2 = this; } public void OnTimedEvent(object source, ElapsedEventArgs e) { tmr.Stop(); MessageBox.Show("Before timer event"); logOut(); MessageBox.Show("After timer event"); } private void button1_Click(object sender, EventArgs e) { logOut(); } public void logOut() { if (tmr != null) { tmr.Stop(); tmr = null; } /* * It doesn't work directly. I'll try to do it in another way. this.Hide(); this.Owner.Show(); this.Owner.Activate(); */ frm1.Show(); frm1.Activate(); frm2.Close(); } } } </code></pre> <p>Thanks for answers!</p>
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    1. PO
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      1. PTAnswer
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    1. PTQuestion
    1. USAlbin Sunnanbo
    1. USlc0
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    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
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      1. PTAnswer
    1. This table or related slice is empty.
    1. COWhat does not work? Any errors?
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      1. POC#: form switching, what based on timers events
      1. USAlbin Sunnanbo
    2. COIt doesn't show first form, but also doesn't show any exceptions or error. In both variants I call similar method. But in second way it doesn't work. I don't now why :(
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      1. POC#: form switching, what based on timers events
      1. USlc0
    3. COTo prevent Threading issues, I would use a System.Windows.Forms.Timer
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      1. POC#: form switching, what based on timers events
      1. USHenk Holterman
 

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