ISendMessageCallback 介面

定義

命名空間:

System.ServiceModel.Activities

組件:

System.ServiceModel.Activities.dll

介面，這個介面會實作 Send 或 SendParametersContent 活動在網路上傳送訊息前所呼叫的回呼。

public interface class ISendMessageCallback

public interface ISendMessageCallback

type ISendMessageCallback = interface

Public Interface ISendMessageCallback

範例

下列範例示範如何在網路傳送訊息之前，先將介面實 ISendMessageCallback 作至新標頭。

class SendInstanceIdCallback : ISendMessageCallback
{
    public const string HeaderName = "InstanceIdHeader";
    public const string HeaderNS = "http://Microsoft.Samples.AccessingOperationContext";

    public Guid InstanceId { get; set; }

    public void OnSendMessage(System.ServiceModel.OperationContext operationContext)
    {
        operationContext.OutgoingMessageHeaders.Add(MessageHeader.CreateHeader(HeaderName, HeaderNS, this.InstanceId));
    }
}

方法

OnSendMessage(OperationContext)

在傳送服務訊息時執行。