WCF 服务 aync 模式反馈失败的传输

发布于 2024-09-14 02:25:43 字数 685 浏览 12 评论 0原文

我正在 Silverlight 4 中工作，并使用用于更新客户端的异步模式实现轮询双工服务。


    // interface for messages back to client
    [OperationContract(IsOneWay = true, AsyncPattern=true)]
    IAsyncResult BeginSendMessage(byte[] MessageData, AsyncCallback callback, object State);

    void EndSendMessage(IAsyncResult result);

我使用定义的 RequestState 对象对客户端进行回调，以跟踪我发送到的连接客户端。


    AsyncCallback callback = new AsyncCallback(this.MessageSent);
    RequestState state = new RequestState { ConnectionNo = connectionno};
    client.BeginSendMessage(MessageData, callback, state);

我没有看到任何方法可以使用回调中返回的 IAsyncResult 参数来检查错误。

那么我的问题是，如何判断消息是否发送失败？

原文

I am working in Silverlight 4 and implementing a Polling Duplex service with an asynchronous pattern used to update the clients.


    // interface for messages back to client
    [OperationContract(IsOneWay = true, AsyncPattern=true)]
    IAsyncResult BeginSendMessage(byte[] MessageData, AsyncCallback callback, object State);

    void EndSendMessage(IAsyncResult result);

I make the call back to the client using a RequestState object I defined to keep track of which connected client I sent to.


    AsyncCallback callback = new AsyncCallback(this.MessageSent);
    RequestState state = new RequestState { ConnectionNo = connectionno};
    client.BeginSendMessage(MessageData, callback, state);

I don't see any way to check for an error using the IAsyncResult parameter that is given back in the callback.

So my question is, how can I tell if the message fails to be sent?

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贪恋 2024-09-21 02:25:43

感谢这篇文章的帮助，我找到了自己问题的答案有没有办法获得异步 WCF 调用的错误反馈？ :)

当回调返回时，我使用状态对象中传递的 ConnectionNo 再次在连接列表中找到该连接。

然后我打电话


    try
    {
        //This is the method that is defined in my ServiceContract to complete the AsyncPattern
        client.EndSendMessage(asyncresult);
    }
    catch
    {
        //code here to notify the server that there was an error sending the message
    }

I found the answer to my own question thanks to the help in this post Is there a way to get error feedback on asynchronous WCF calls? :)

When the callback returns, I find the connection in my connection list again using the ConnectionNo I passed through in the state object.

I then call


    try
    {
        //This is the method that is defined in my ServiceContract to complete the AsyncPattern
        client.EndSendMessage(asyncresult);
    }
    catch
    {
        //code here to notify the server that there was an error sending the message
    }

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