MsmqElementBase.ExactlyOnce Property
Definition
Important
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Gets or sets a Boolean value that indicates whether messages processed by this binding will be received exactly once.
public:
property bool ExactlyOnce { bool get(); void set(bool value); };[System.Configuration.ConfigurationProperty("exactlyOnce", DefaultValue=true)]
public bool ExactlyOnce { get; set; }[<System.Configuration.ConfigurationProperty("exactlyOnce", DefaultValue=true)>]
member this.ExactlyOnce : bool with get, setPublic Property ExactlyOnce As BooleanProperty Value
true if messages processed by this binding will be received exactly once; otherwise, false. The default is true.
- Attributes
Remarks
A message can be sent with or without assurances. An assurance enables an application to ensure that a sent message reached the receiving message queue, or if it did not, the application can determine this by reading the dead-letter queue.
Messages sent with ExactlyOnce set to true must be sent only to a transactional queue.
ExactlyOnce, when set to true, indicates that Message Queuing (also known as MSMQ) will ensure that a sent message is delivered to the receiving message queue once and only once, and if delivery fails, the message is sent to the dead-letter queue.
For messages that require ExactlyOnce to be false, the DeadLetterQueue property defaults to null.
For messages that require ExactlyOnce to be true, the DeadLetterQueue property defaults to a transactional system-wide dead-letter queue in Message Queuing.
