CODEWITHSUNDEEP
c#interopmsmqcom-interop
Vaccano
Vaccano

Reputation: 82437

Can not get MSMQ Com to find my Queue

I am trying to get a count of messages in my MSMQ. I have found this code on the internet (many times):

// setup the queue management COM stuff
MSMQManagement _queueManager = new MSMQManagement();

object machine = "MyLaptopComputer";
object path = @"DIRECT=OS:MyLaptopComputer\PRIVATE$\MyQueue";

_queueManager.Init(ref machine, ref path);

Console.WriteLine(_queueManager.MessageCount);

Marshal.ReleaseComObject(_queueManager);

Every time I get to _queueManager.Init it fails with this error:

The queue path name specified is invalid.

I have checked (and double checked) my queue name to see if that is wrong. I have tried different queues, different machines, running remote, running local... Nothing works.

I have also tried variations on the code above. For example I have tried:

_queueManager.Init("MyLaptopComputer", @"DIRECT=OS:MyLaptopComputer\PRIVATE$\MyQueue");

The queues are used with NServiceBus and function just fine when I use NServiceBus to access them.

Does anyone have an Idea on how I can get this to work?

Upvotes: 0

Views: 1670

Answers (2)

Vaccano
Vaccano

Reputation: 82437

Turns out it was a combination of issues. The biggest being that I needed to use FormatName not path name.

_queueManager.Init("MyComputer", null, @"DIRECT=OS:MyComputer\PRIVATE$\MyQueue");

Also, it will throw an exception if the queue is empty...

Got to love COM interfaces. :)

Upvotes: 0

M.Babcock
M.Babcock

Reputation: 18965

I think the problem is the error you're getting is a little misguiding. MSMQManagement.Init takes 3 parameters. They're all optional which is why in other languages (like VB) you'll sometimes see it called with only 2 parameters.

There is a CodeProject project that shows how to do what you're doing in C#:

private int GetMessageCount(string queueName)
{
    int count = 0;
    try
    {

        MSMQ.MSMQManagement mgmt = new MSMQ.MSMQManagement();
        MSMQ.MSMQOutgoingQueueManagement outgoing;
        String s = "YOURPCNAME";
        Object ss = (Object)s;
        String pathName = queueName;
        Object pn = (Object)pathName;
        String format = null;
        Object f = (Object)format;

        mgmt.Init(ref ss , ref f, ref pn);

        outgoing = (MSMQ.MSMQOutgoingQueueManagement)mgmt;
        count = outgoing.MessageCount;

    }
    catch (Exception ee)
    {
        MessageBox.Show(ee.ToString());
    }
    return count;
}

It might provide a better starting point.

Upvotes: 1

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