Re: Message queues

A slightly different issue. This is all on the Vista machine, not the iPAQ now. Here is some code. The m_queue.BeginReceive method gets called, but after a few seconds it throws an exception which is caught, but the ex variable is null. My MessageArrived method is never called either even though I have added it to the ReceiveCompleted event. Now I dont know what to do. This is pretty darn simple code. I can see two messages in the queue on david-1. I can run the server app on david-1 at the same time as the remote side is running. The server app creates new entries but still the MessageArrived handler is not called and a bogus exception is thrown.

Ideas?

public partial class Form1 : Form
{
private MessageQueue m_queue;

public Form1()
{
InitializeComponent();
}

private void Form1_Load(object sender, EventArgs e)
{
try
{
string deviceIP = String.Empty;
IPAddress[] addresses = Dns.GetHostEntry("david-1").AddressList;
for (int i = 0; i < addresses.Length; ++i)
{
IPAddress addr = addresses[i];
if (addr.AddressFamily == AddressFamily.InterNetwork)
{
deviceIP = addr.ToString();
break;
}
}
if (deviceIP == String.Empty)
{
MessageBox.Show("Unable to retrieve Device IP");
Close();
return;
}

String strPath = String.Format(@"FormatName:DIRECT=TCP:{0}\PRIVATE$\CallerID", deviceIP);
m_queue = new MessageQueue(strPath);

if (m_queue != null)
{
System.Type[] types = new Type[1];
types[0] = typeof(CallerIDClient.CallerID);
m_queue.Formatter = new XmlMessageFormatter(types);

try
{
m_queue.ReceiveCompleted += new ReceiveCompletedEventHandler(MessageArrived);
}
catch (MessageQueueException ex)
{
MessageBox.Show(ex.Message);
Close();
}

Thread t1 = new Thread(PeekMessages);
t1.IsBackground = true;
t1.Start();
}
else
{
MessageBox.Show("Queue not created");
Close();
}
}
catch (MessageQueueException ex)
{
MessageBox.Show(ex.Message);
return;
}
}

private void PeekMessages()
{
while (true)
{
try
{
m_queue.BeginReceive();
}
catch (MessageQueueException ex)
{
MessageBox.Show(ex.Message);
return;
}
}
}

public void MessageArrived(Object source, ReceiveCompletedEventArgs args)
{
MessageQueue queue = source as MessageQueue;
Message message = queue.EndReceive(args.AsyncResult);

CallerIDClient.CallerID callerid = message.Body as CallerIDClient.CallerID;
if (callerid != null)
{
ListViewItem lvi = new ListViewItem(callerid.Name);
lvi.SubItems.Add(callerid.Number);
listView1.Items.Add(lvi);
}
}

private void AddItem(String strID)
{
Message message = m_queue.PeekById(strID);
CallerIDClient.CallerID callerid = message.Body as CallerIDClient.CallerID;
if (callerid != null)
{
ListViewItem lvi = new ListViewItem(callerid.Name);
lvi.SubItems.Add(callerid.Number);
listView1.Items.Add(lvi);
}
}
}


"Paul G. Tobey [eMVP]" <p space tobey no spam AT no instrument no spam DOT com> wrote in message news:%23NHqHKveIHA.5164@xxxxxxxxxxxxxxxxxxxxxxx
Hmmm. Well, that suggests that you don't have network continuity between where you are and where the queue is or that you don't have message queue running on the device or, maybe, on the PC. Doesn't the MSMQ for your device come with some sort of administrative tool for checking the status, etc.? Can you ping or otherwise verify network connectivity between the two ends of your communication path?

Paul T.

"David" <david@xxxxxxxxxxx> wrote in message news:F742D99F-CFC2-4F61-B4C7-86E5684A93D0@xxxxxxxxxxxxxxxx
I have tried this on both the iPAQ and the Vista-32 machine:

if (!MessageQueue.Exists(@"FormatName:DIRECT=TCP:10.0.0.20\private$\callerid"))

I get this error:

Cannot determine whether a queue with the specified format name exists


"Paul G. Tobey [eMVP]" <p space tobey no spam AT no instrument no spam DOT com> wrote in message news:%23lrJHAveIHA.5788@xxxxxxxxxxxxxxxxxxxxxxx
I think that you've left out the type of the path. Have you tried DIRECT=OS:, etc.? It may simply be that the desktop framework is constructing that for you by default and the CF is not or something.

Paul T.

"David" <david@xxxxxxxxxxx> wrote in message news:032CACCF-46C0-44BA-B0EC-568FD335A770@xxxxxxxxxxxxxxxx
I have replaced the david-1 with the ip address of david-1, 10.0.0.20, with the same results.

I now have a simple client on another Vista-32 machine. All I do is call:

MessageQueue.Exists(@"david-1\private$\callerid")

I get an error stating that I have an invalid queue path name. What is wrong with my path?
"Paul G. Tobey [eMVP]" <p space tobey no spam AT no instrument no spam DOT com> wrote in message news:OJpW%23iueIHA.5400@xxxxxxxxxxxxxxxxxxxxxxx
I don't use MSMQ on a daily basis, but I've used this sort of string

DIRECT=OS:farside\\private$\\lp45incoming

before, where farside was the NetBIOS name of the system hosting the queue. I'm not sure that DNS can be used to resolve the name, but the name you're using is not being resolved with DNS, I'd bet.

Paul T.

"David" <david@xxxxxxxxxxx> wrote in message news:F0908FCC-F9AB-41EA-A52C-F654773E82D0@xxxxxxxxxxxxxxxx
This is all .NET 3.5 with Visual Studio 2008

I have a simple app on Windows Vista-64 that creates a messaging queue. FormatName:DIRECT=OS:david-1\private$\callerid.

The app then writes a couple of entries. I have verified that the entries have been correctly created with the Computer Management tool.

I now have a simple app written for the compact framework on an HP iPAQ HP 2790. MSMQ has been installed on it. When I call MessageQueue.Exists(@"david-1\private$\callerid"), it returns false. I can call this code:

IPAddress[] addresses = Dns.GetHostEntry("david-1").AddressList;

and the correct address comes back so I know networking and dns are working properly.

Is there something special that I have to do on the Vista-64 machine or on the iPAQ to make this work?












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