如何在进行异步调用时关闭soap客户端?
问题描述:
我正在异步调用soap服务,但停留在需要关闭soap客户端连接的地方。以前的帖子没什么帮助:How to close Client Proxy with Async Call WCF如何在进行异步调用时关闭soap客户端?
以下是我的代码到目前为止。
下面的方法(GetFieldList(....)调用带有请求参数的泛型方法ApiClient.GetResponse(....),并调用什么样的服务
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,我已经注释掉finally块,因为连接被关闭之前的响应返回给调用方法。
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;
}
}
任何想法,我缺少的是什么? 感谢
答
我建议有一个全局的WebServiceClient或ApiClient,并在两个线程中执行GetResponse和CloseClient。这样,即使您在等待响应,您也可以在CloseClient线程中强制触发客户端关闭。
我知道这是一个旧的帖子,你可能已经找到了它出了什么问题,但出于好奇,当没有异步时,你如何能够等待GetResponse,也是你的问题而不是“等待”的“GetFieldListAsync”,因为它退出你的范围和连接被杀害? –