dotnet compact framework: Hi,

I am a beginer learning how to develop application for smart device. I want
my application to verify network connection when application startup. When
verifying network connection, I display status using ProgressBar. I
understand that I will need to run the verify network procedure on a new
thread so that the Form interface can completely load.

Below is my code snippet:

private Thread threadVerifyConnection;

public FormMain()
{
InitializeComponent();
threadVerifyConnection = new Thread(new
ThreadStart(this.VerifyConnection));
threadVerifyConnection.Start();
}

private void VerifyConnection()
{
WebRequest webRequest = WebRequest.Create("UrlString");
webRequest.Timeout = 5000;
IAsyncResult result = webRequest.BeginGetResponse(null, null);

while (!result.IsCompleted)
{
if (progressBarConnection.Value == progressBarConnection.Maximum)
progressBarConnection.Value = 0;
else
progressBarConnection.Value = progressBarConnection.Value + 1;

progressBarConnection.Update();
}

HttpWebResponse response = (HttpWebResponse)
webRequest.EndGetResponse(result);

//... do something here
}

But I think I must be understand something wrongly as when I run my
application onto the Pocket PC 2002 Emulator, nothing come out... not even
the Form!! But I can see from the emulator's memory that the application is
running but not responding.

Can someone enlighten me?

Thank you.

--
Soul

From VerifyConnection() you cannot update the main UI thread as you do in progressBarConnection.Update(). You will have to do a progressBar.Invoke() or this.Invoke(). This will invoke the main UI thread where you will be able to update the progress bar

Check out the code below
Mark Arteag

private void VerifyConnection(

WebRequest webRequest = WebRequest.Create("UrlString")
webRequest.Timeout = 5000
IAsyncResult result = webRequest.BeginGetResponse(null, null)

while (!result.IsCompleted


this.Invoke(new EventHandler(UpdateProgress); //Update the U


HttpWebResponse response = (HttpWebResponse
webRequest.EndGetResponse(result)

//... do something her


private void UpdateUI(object sender, EventArgs e

if (progressBarConnection.Value == progressBarConnection.Maximum
progressBarConnection.Value = 0
els
progressBarConnection.Value = progressBarConnection.Value + 1

progressBarConnection.Update()

//You can also update any other UI objects i.e. label