连续的Web服务调用总是超时 [英] Consecutive web service calls always time out
问题描述
Hi Experts，
Hi Experts,
我有一个服务器应用程序，它提供Web服务来下载一些二进制数据。在客户端侧，我使用由.NET框架从SoapHttpClientProtocol继承做异步调用生成的代理，如下图所示
I have a server application which provides web service to download some binary data. At the client side, I use the proxy generated by .net framework which inherits from SoapHttpClientProtocol to do async call, shown as below
公共部分类服务：System.Web.Services.Protocols。 SoapHttpClientProtocol {
public partial class service : System.Web.Services.Protocols.SoapHttpClientProtocol {
...
公共System.IAsyncResult BeginRetrieveData（PrintQueueWebServiceRetrieveDataRequest PrintQueueWebServiceRetrieveDataRequest，System.AsyncCallback回调，对象asyncState）
{
返回this.BeginInvoke（QUOT; RetrieveData" ;,新的对象[] {
             &NBSP ;      PrintQueueWebServiceRetrieveDataRequest}，回调，asyncState）;
        }
public System.IAsyncResult BeginRetrieveData(PrintQueueWebServiceRetrieveDataRequest PrintQueueWebServiceRetrieveDataRequest, System.AsyncCallback callback, object asyncState)
{
return this.BeginInvoke("RetrieveData", new object[] {
PrintQueueWebServiceRetrieveDataRequest}, callback, asyncState);
}
...
}
service myService = new Service（）;
service myService = new Service();
的IAsyncResult asyncResult =为myService .BeginRetrieveData（请求，NULL，NULL）;
WaitHandle.WaitAny（新的WaitHandle [] {asyncResult.AsyncWaitHandle，terminate.handle}，为myService .Timeout ，false）;
IAsyncResult asyncResult = myService .BeginRetrieveData(request, null, null);
WaitHandle.WaitAny(new WaitHandle[] { asyncResult.AsyncWaitHandle, terminate.handle }, myService .Timeout, false);
if（！asyncResult.AsyncWaitHandle.WaitOne（0，false））
{
if (!asyncResult.AsyncWaitHandle.WaitOne(0, false))
{
/ /如果超时，请尝试再次拨打电话
//Try to call again in case of time out
}
如果超时，我想再次拨打网络服务电话对较小的二进制数据块的请求（当然它是由服务支持的）。但是，无论chunck有多小，连续的呼叫总是会超时。我试图
首先调用myService.Abort（）或myService.CancelAsync（），甚至使用服务代理的新实例，它们都不起作用。
In case of time out, I'd like to call the web service again with a request to a smaller chunk of the binary data (of course it's supported by the service). However, no matter how small the chunck is, the consecutive calls would always time out. I tried to call myService.Abort() or myService.CancelAsync() first or even use a new instance of service proxy, none of them works.
我怎样才能实现这个？？在此先感谢您的帮助！
How can I achieve this?? Thanks in advance for your help!!
推荐答案
由于Timeout是一个例外，您可以将代码包含在try catch机制中，并且在catch块你可以用少量的数据重试你的请求。
As Timeout is an exception you can enclose your code inside a try catch mechanism and in the catch block you can retry your request with a lesser amount of chunck of data.
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