The number of messages on an MSMQ via Powershell

This will list all queues on a machine and the number of messages:

gwmi -class Win32_PerfRawData_MSMQ_MSMQQueue -computerName $computerName |    ft -prop Name, MessagesInQueue

PowerShell under Windows Server 2012/2012 R2 and Windows 8/8.1 has a bunch built-in Cmdlets that can be used by installing the Microsoft Message Queue (MSMQ) Server Core feature.

# Get all message queuesGet-MsmqQueue;# Get all the private message queues.# Display only the QueueName and MessageCount for each queue.Get-MsmqQueue -QueueType Private | Format-Table -Property QueueName,MessageCount;

There is a number of other Cmdlets that can be used for queue management and message creation. i.e.

• New-MsmqQueue
• Remove-MsmqQueue
• Send-MsmqQueue
• Receive-MsmqQueue
• Get-MsmqQueueManager

For the full list of MSMQ Cmdlet help see MSMQ Cmdlets in Windows PowerShell, or Get-Command -Module MSMQ if you already have the feature installed.

So, I saw this: What can I do with C# and Powershell? and went here:http://jopinblog.wordpress.com/2008/03/12/counting-messages-in-an-msmq-messagequeue-from-c/

And made this

# Add the .NET assembly MSMQ to the environment.[Reflection.Assembly]::LoadWithPartialName("System.Messaging")# Create a new QueueSizer .NET class help to warp MSMQ calls.$qsource = @"public class QueueSizer    {        public static System.Messaging.Message PeekWithoutTimeout(System.Messaging.MessageQueue q, System.Messaging.Cursor cursor, System.Messaging.PeekAction action)        {            System.Messaging.Message ret = null;            try            {                // Peek at the queue, but timeout in one clock tick.                ret = q.Peek(new System.TimeSpan(1), cursor, action);            }            catch (System.Messaging.MessageQueueException mqe)            {                // Trap MSMQ exceptions but only ones relating to timeout. Bubble up any other MSMQ exceptions.                if (!mqe.Message.ToLower().Contains("timeout"))                {                    throw;                }            }            return ret;        }        // Main message counting method.        public static int GetMessageCount(string queuepath)        {            // Get a specific MSMQ queue by name.            System.Messaging.MessageQueue q = new System.Messaging.MessageQueue(queuepath);            int count = 0;            // Create a cursor to store the current position in the queue.            System.Messaging.Cursor cursor = q.CreateCursor();            // Have quick peak at the queue.            System.Messaging.Message m = PeekWithoutTimeout(q, cursor, System.Messaging.PeekAction.Current);            if (m != null)            {                count = 1;                // Keep on iterating through the queue and keep count of the number of messages that are found.                while ((m = PeekWithoutTimeout(q, cursor, System.Messaging.PeekAction.Next)) != null)                {                    count++;                }            }            // Return the tally.            return count;        }    }"@# Add the new QueueSizer class helper to the environment.Add-Type -TypeDefinition $qsource -ReferencedAssemblies C:\Windows\assembly\GAC_MSIL\System.Messaging\2.0.0.0__b03f5f7f11d50a3a\System.Messaging.dll# Call the helper and get the message count.[QueueSizer]::GetMessageCount('mymachine\private$\myqueue');

And it worked.