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POThread and Invoke, how to modify a label?
 

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  1. POThread and Invoke, how to modify a label?
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    <p>I work on an application in c# and I have a problem with my thread and my UI...</p> <p>I want to add +1 on my label when the thread is running. The problem is I don't know how I can fix that... I have read a lot of "how to" but the solutions donc work with my app..</p> <p>My thread class:</p> <pre><code> class clsWorker { //Thread myThread = new Thread(new ThreadStart(ThreadLoop)); public SerialPort port; public String url; Thread t; clsSMS clsobjSMS = new clsSMS(); SMSapplication clsobjAPP = new SMSapplication(); public clsWorker(SerialPort serialPort, String urlChamp) { this.port = serialPort; this.url = urlChamp; } public void StartThread() { t = new Thread(new ThreadStart(ThreadLoop)); t.Start(); } public void ThreadLoop() { // How I can add +1 on the countSMSok label ?? clsobjAPP.updateCountSMS("countSMSok"); } } </code></pre> <p>My application class :</p> <pre><code>public partial class SMSapplication : Form { public void updateCountSMS(String label) { int num; this.countSMSnok = new System.Windows.Forms.Label(); this.countSMSok = new System.Windows.Forms.Label(); this.Controls.Add(this.countSMSnok ); this.Controls.Add(this.countSMSok ); if (label == this.countSMSok.Name.ToString()) { if (int.TryParse(this.countSMSok.Text.ToString(), out num)) this.countSMSok.Invoke((MethodInvoker)(() =&gt; this.countSMSok.Text = num++.ToString())); } else if (label == this.countSMSnok.Name.ToString()) { if (int.TryParse(this.countSMSnok.Text.ToString(), out num)) this.countSMSnok.Invoke((MethodInvoker)(() =&gt; this.countSMSnok.Text = num++.ToString())); } } private void btnRequestStart_Click(object sender, EventArgs e) { this.btnRequestStart.Enabled = false; this.btnRequestStop.Enabled = true; objclsWorker = new clsWorker(this.port, this.urlChecker.Text); objclsWorker.StartThread(); } } </code></pre> <p>Thanks you very very much for your helping !</p>
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    1. USGeoffrey
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    1. COWhat does "doesn't work" mean? Please post any error messages/exceptions you get.
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      1. POThread and Invoke, how to modify a label?
      1. USLennart
    2. COI have added the exception :) Thanks you for your helping !
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      1. POThread and Invoke, how to modify a label?
      1. USGeoffrey
    3. COTry adding `IntPtr tempHandle = this.Handle;` before the Invoke call. This accesses the window handle the exception complains about.
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      1. POThread and Invoke, how to modify a label?
      1. USLennart
 

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