MessagePropertyFilter.Extension 属性

定义

命名空间:

System.Messaging

程序集:

System.Messaging.dll

获取或设置一个值，该值指示接收或查看消息时是否检索 Extension 属性信息。

public:
 property bool Extension { bool get(); void set(bool value); };

[System.Messaging.MessagingDescription("MsgExtension")]
public bool Extension { get; set; }

[<System.Messaging.MessagingDescription("MsgExtension")>]
member this.Extension : bool with get, set

Public Property Extension As Boolean

属性值

Boolean

如果接收 Extension 信息，则为 true；否则为 false。 默认值为 false。

属性

MessagingDescriptionAttribute

示例

下面的代码示例演示如何使用 Extension 属性。

// Set the queue's MessageReadPropertyFilter property 
// to enable the message's Extension property.
queue->MessageReadPropertyFilter->Extension = true;

// Peek at the message. Time out after ten seconds 
// in case the message was not delivered.
orderMessage = queue->Peek(TimeSpan::FromSeconds(10.0));

// Display the value of the message's Extension property.
Console::WriteLine("Message.Extension: {0}", 
    orderMessage->Extension);

// Set the queue's MessageReadPropertyFilter property to enable the
// message's Extension property.
queue.MessageReadPropertyFilter.Extension = true;

// Peek at the message. Time out after ten seconds in case the message
// was not delivered.
orderMessage = queue.Peek(TimeSpan.FromSeconds(10.0));

// Display the value of the message's Extension property.
Console.WriteLine("Message.Extension: {0}",
    orderMessage.Extension);

注解

Extension类的 Message 属性提供与消息关联的其他应用程序定义信息，例如大型二进制对象。 接收应用程序负责解释 的内容 Extension。

另请参阅

• Extension
• DefaultExtensionSize
• MessageQueue