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POAsp.net Update labels based on event
 

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    <p>i am facing one problem.</p> <p>what i have to do is. There is a button on page which starts the processing of some jobs.</p> <p>when i press start button i am calling ProcessJobs method of my Business layer which raises an event having total number of jobs. I have to display this count in ListBox control. </p> <p>After this in processing of job there are several status messages raised via same event. these messages should be displayed at web form in list box control</p> <p>But i am not getting web page to update itself. I also added timer control and refreshes the page after 1 sec. but page is not being updated.</p> <p>here is code</p> <p>Default.aspx.cs</p> <pre><code>public partial class xxxxx: System.Web.UI.Page { private xxxx manager; protected void Page_Load(object sender, EventArgs e) { if (this.manager == null) { manager = new xxxx(); this.manager.ProcessEmailEvent += new EventHandler&lt;EventArg&lt;string&gt;&gt;(manager_ProcessEmailEvent); } if (!Page.IsPostBack) { this.btnStop.Visible = false; } } void manager_ProcessEmailEvent(object sender, EventArg&lt;string&gt; e) { this.lblStatus.Text = this.lblStatus.Text + "&lt;br&gt;" + e.Data; } protected void processEmailTimer_Tick(object sender, EventArgs e) { int tickCount = this.manager.EmailProcessCount; int totalEmailCount = this.manager.TotalEmailsCount; this.lblProcessEmail.Text = string.Format("Processing Emails &lt;b&gt;{0}&lt;/b&gt; of &lt;b&gt;{1}&lt;/b&gt;", tickCount, totalEmailCount); } protected void btnStart_Click(object sender, EventArgs e) { this.processEmailTimer.Enabled = true; this.btnStart.Visible = false; this.btnStop.Visible = true; this.manager.ProcessEmails(this.chkValidateEmail.Checked, this.chkTesting.Checked); } protected void btnStop_Click(object sender, EventArgs e) { this.processEmailTimer.Enabled = false; this.btnStart.Visible = true; this.btnStop.Visible = false; this.manager.Stop(); } </code></pre> <p>Here is business Logic for processing emails</p> <pre><code>public event EventHandler&lt;EventArg&lt;string&gt;&gt; ProcessEmailEvent; public void InvokeProcessEmailEvent(EventArg&lt;string&gt; e) { EventHandler&lt;EventArg&lt;string&gt;&gt; handler = ProcessEmailEvent; if (handler != null) handler(this, e); } public void ProcessEmails(bool validateSenderEmail, bool deleteEmailAfterProcess) { // Creaate pop3 Client POP3_Client popClient = new POP3_Client(); // Connect to POP3 host popClient.Connect(Utility.POP3Host, Utility.POP3Port, Utility.UseSSL); // Authenticate email address and password popClient.Authenticate(Utility.EmailAddress, Utility.Password, false); // Get Email count int msgCount = popClient.Messages.Count; // Raising event to update status on default.aspx this.InvokeProcessEmailEvent(new EventArg&lt;string&gt;("Emails : " + msgCount)); TotalEmailsCount = msgCount; // Start emai Processing processEmailStarted = true; for (int i = 0; i &lt; msgCount; i++) { this.EmailProcessCount = i + 1; // Raising event to update status on default.aspx this.InvokeProcessEmailEvent(new EventArg&lt;string&gt;("Getting Email " + (i + 1))); // Get message var msg = popClient.Messages[i]; // Get Email header Mail_Message mime = Mail_Message.ParseFromByte(msg.HeaderToByte()); StringBuilder sb = new StringBuilder(); this.InvokeProcessEmailEvent(new EventArg&lt;string&gt;("--------------------------------")); this.InvokeProcessEmailEvent(new EventArg&lt;string&gt;("From : " + mime.From.ToString())); this.InvokeProcessEmailEvent(new EventArg&lt;string&gt;("Subject : " + mime.Subject.ToString())); this.InvokeProcessEmailEvent(new EventArg&lt;string&gt;("Date : " + mime.Date.ToString())); this.InvokeProcessEmailEvent(new EventArg&lt;string&gt;("Size (KB): " + (msg.Size / (decimal)1000).ToString())); } } </code></pre>
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    1. USMohsan
    1. USMohsan
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    1. COCan you share your code so we can see exactly what is going on?
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      1. USBecuzz
    2. COIs this message that you want to change in an update panel? What does your aspx page look like?
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      1. USBecuzz
    3. COyes there is update panel and button and listbox and timer is in update panel
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      1. USMohsan
 

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