Open existing MSMQ

[Kimmo Laine]

Hi,

one stupid question? How can i be sure that i have valid queue:

using System;
using System.Messaging;

// . . .

MessageQueue q = new MessageQueue( ".\\Private$\\myQueue" );

// Can i call send!?!?
q.Send( "Hello!" );

Is there a way to open existing queue?
thc

Kimmo Laine

[Cezary Nolewajka]

You can check a queue existance using the MessageQueue.Exists method.

Then you know whether the queue can be used.
--
Cezary Nolewajka
mailto:c.*********************@no-sp-am-eh-mail.com
remove all "no-sp-am-eh"s to reply
"Kimmo Laine" <reply.to@newsgroup> wrote in message news:%2****************@TK2MSFTNGP12.phx.gbl...

Hi,

one stupid question? How can i be sure that i have valid queue:

using System;
using System.Messaging;

// . . .

MessageQueue q = new MessageQueue( ".\\Private$\\myQueue" );

// Can i call send!?!?
q.Send( "Hello!" );

Is there a way to open existing queue?


thc

Kimmo Laine

[Kimmo Laine]

From MSDN: "Exists is an expensive operation. Use it only when it is
necessary within the application."

Is there another way to do it?
Kimmo Laine
"Cezary Nolewajka" <c.*********************@no-sp-am-eh-mail.com> wrote in
message news:uc**************@TK2MSFTNGP12.phx.gbl...
You can check a queue existance using the MessageQueue.Exists method.

Then you know whether the queue can be used.
--
Cezary Nolewajka
mailto:c.*********************@no-sp-am-eh-mail.com
remove all "no-sp-am-eh"s to reply
"Kimmo Laine" <reply.to@newsgroup> wrote in message
news:%2****************@TK2MSFTNGP12.phx.gbl...

Hi,

one stupid question? How can i be sure that i have valid queue:

using System;
using System.Messaging;

// . . .

MessageQueue q = new MessageQueue( ".\\Private$\\myQueue" );

// Can i call send!?!?
q.Send( "Hello!" );

Is there a way to open existing queue?
thc

Kimmo Laine

[Cezary Nolewajka]

True. That is why you should do that only once - when application or service starts.

A trick to use is to do a Peek (TimeSpan.Zero) on the MQ you want to test and see if and what exception (if at all) you receive.

In case of an non-existant queue, the MessageQueueException has the MessageQueueErrorCode property set to "QueueNotFound" value.

If there are no messages in the queue, you will get a timeout exception, so you will know that the queue exists.
If there are any messages, then you will not receive any exceptions.

--
Cezary Nolewajka
mailto:c.*********************@no-sp-am-eh-mail.com
remove all "no-sp-am-eh"s to reply
"Kimmo Laine" <reply.to@newsgroup> wrote in message news:Ow**************@TK2MSFTNGP11.phx.gbl...

From MSDN: "Exists is an expensive operation. Use it only when it is
necessary within the application."

Is there another way to do it?


Kimmo Laine


"Cezary Nolewajka" <c.*********************@no-sp-am-eh-mail.com> wrote in
message news:uc**************@TK2MSFTNGP12.phx.gbl...
You can check a queue existance using the MessageQueue.Exists method.

Then you know whether the queue can be used.


--
Cezary Nolewajka
mailto:c.*********************@no-sp-am-eh-mail.com
remove all "no-sp-am-eh"s to reply


"Kimmo Laine" <reply.to@newsgroup> wrote in message
news:%2****************@TK2MSFTNGP12.phx.gbl...

Hi,

one stupid question? How can i be sure that i have valid queue:

using System;
using System.Messaging;

// . . .

MessageQueue q = new MessageQueue( ".\\Private$\\myQueue" );

// Can i call send!?!?
q.Send( "Hello!" );

Is there a way to open existing queue?
thc

Kimmo Laine