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MessageQueue.Category Property

.NET Framework 4

Other Versions

Gets or sets the queue category.

Namespace: System.Messaging
Assembly: System.Messaging (in System.Messaging.dll)

Syntax

C++

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[MessagingDescriptionAttribute("MQ_Category")]
public Guid Category { get; set; }

Property Value

Type: System.Guid
A Guid that represents the queue category (Message Queuing type identifier), which allows an application to categorize its queues. The default is Guid.empty.

Exceptions

Exception	Condition
ArgumentException	The queue category was set to an invalid value.
MessageQueueException	An error occurred when accessing a Message Queuing method.

Remarks

The queue category allows an application to categorize its queues. For example, you can place all Billing queues in one category and all Order queues in another.

The Category property provides access to the Message Queuing Type ID property (which is read/write), accessible through the Queue Properties dialog box in the Computer Management Console. You can define a new category. Although you can use NewGuid to create a category value that is unique across all Guid values, such an action is unnecessary. The category value needs to be distinct only from other categories, not from all other Guid values. For example, you can assign {00000000-0000-0000-0000-000000000001} as the Category for one set of queues and {00000000-0000-0000-0000-000000000002} as the Category for another set.

It is not necessary to set the Category. The value can be null.

Setting this property modifies the Message Queuing queue. Therefore, any other MessageQueue instances are affected by the change.

The following table shows whether this property is available in various Workgroup modes.

Workgroup mode	Available
Local computer	Yes
Local computer and direct format name	Yes
Remote computer	No
Remote computer and direct format name	No

Examples

The following code example gets and sets the value of a message queue's Category property.

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// Set the queue's Category property value.
queue.Category =
    new System.Guid("00000000-0000-0000-0000-000000000001");

// Display the new value of the queue's Category property.
Console.WriteLine("MessageQueue.Category: {0}", queue.Category);

Version Information

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

.NET Framework Security

Full trust for the immediate caller. This member cannot be used by partially trusted code. For more information, see Using Libraries from Partially Trusted Code.

Platforms

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

Reference

MessageQueue Class

System.Messaging Namespace

Label

GetPublicQueues

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