Question

我正在异步调用soap服务，但仍然需要关闭soap客户端连接。以前的帖子没有多少帮助：How to close Client Proxy with Async Call WCF

到目前为止，我的代码如下。

下面的方法（GetFieldList（....）使用请求参数调用泛型方法ApiClient.GetResponse（....）以及要调用的服务

 public async Task<ServiceReference.GetFieldListResponse> GetFieldList(string identifier)
    {
        var request = new GetFieldListRequest
        {
            Header = new Header {Username = ApiSettings.Instance.ApiToken},
            AGroup = "",
            IdType = "",
            Id = ""
        };
        var response = await ApiClient.GetResponse(request, (c) => c.GetFieldListAsync(request.Header, request.Id, request.IdType, request.AGroup));
        return response;
    }

在下面的方法中，我已经注释掉了finally块，因为在将响应返回给调用方法之前连接已被关闭。

 public class ApiClient
 {

    public static TResponse GetResponse<TResponse, TRequest>(TRequest request, 
            Func<SoapClient, TResponse> handler,
            string apiMethodName = "")
    where TResponse : class
    {
        Debug.WriteLine("Calling: " + typeof(TRequest).Name);
        if (string.IsNullOrEmpty(apiMethodName))
        {
            apiMethodName = typeof(TRequest).Name.Replace("Request", string.Empty);
        }

       // creates a soap connection
        var client = WebServiceClient.CreateServiceInstance();
        TResponse response = null;
        try
        {
            //webservice call is invoked here
            response = handler(client);
        }
        catch (FaultException exception)
        {
            throw new ApiException(string.Format("Api error on {0}.", apiMethodName), exception);
        }

         //if this finally block is not commented, connection is closed before a response was returned to the calling method.
        //finally
        //{
        //  client.Close();
        //}

        return response;
    }
}

知道我错过了什么吗？感谢

Answer 1

我建议使用全局WebServiceClient或ApiClient，并在两个线程中执行GetResponse和CloseClient。这样，即使您正在等待响应，也可以在CloseClient线程中强制触发客户端关闭。

如何在进行异步调用时关闭soap客户端？

1 个答案: