MessagePropertyFilter.Extension 屬性

定義

命名空間:

System.Messaging

組件:

System.Messaging.dll

取得或設定值，指出在接收或窺視訊息時是否要擷取 Extension 屬性資訊。

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

屬性值

Boolean

true 表示接收 Extension 資訊，否則為 false。 預設為 false。

屬性

MessagingDescriptionAttribute

範例

下列程式代碼範例示範 如何使用 Extension 屬性。

// 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);

備註

類別 Extension 的 Message 屬性會提供與訊息相關聯的其他應用程式定義資訊，例如大型二進位物件。 接收應用程式必須負責解譯 的內容 Extension。

另請參閱

• Extension
• DefaultExtensionSize
• MessageQueue