silverlight过一段时间后访问wcf服务失败

[bigzoom]

silverlight界面打开的时候创建了一个wcf的链接，接着一个小时不去操作界面，再次操作界面上的按钮（使用之前创建的wcf服务链接再次去访问服务）访问服务时提示wcf通讯异常：NotFound！请遇到过该问题的解答一下。

[海涵德]

这是正常的。这是我程序中使用初始使用wcf的一段代码，如果你能看懂下面代码，不妨研究一下

public class Class1
{
// 使用例子:
// Private _wcf As New ServiceReferenceWCF.ServiceWCFClient
	// use_optical_line_wcf(_wcf, "../Services/ServiceOpticalLine.svc") ' 


	public static EndpointAddress getEndpointAddress(string relative_uri)
	{
		return new EndpointAddress(new Uri(Application.Current.Host.Source, relative_uri));
	}

	public static void use_wcf(ServiceReferenceWCF.ServiceWCFClient wcf_client_instance, string end_point_address)
	{
		EndpointAddress _end_point_address = default(EndpointAddress);

		_end_point_address = ClassesOptialLineShared.getEndpointAddress(end_point_address);
		//        _end_point_address = ClassesOptialLineShared.getEndpointAddress("../Services/ServiceOpticalLine.svc")

		#if TRACE
		// 调用wcf超时的解决办法
		wcf_client_instance.Endpoint.Binding.OpenTimeout = new TimeSpan(0, 1, 0);
		wcf_client_instance.Endpoint.Binding.CloseTimeout = new TimeSpan(0, 1, 0);
		wcf_client_instance.Endpoint.Binding.SendTimeout = new TimeSpan(0, 18, 0);
		wcf_client_instance.Endpoint.Binding.ReceiveTimeout = new TimeSpan(0, 18, 0);
		#elif
		wcf_client_instance.Endpoint.Binding.OpenTimeout = new TimeSpan(0, 1, 0);
		wcf_client_instance.Endpoint.Binding.CloseTimeout = new TimeSpan(0, 1, 0);
		wcf_client_instance.Endpoint.Binding.SendTimeout = new TimeSpan(0, 5, 0);
		wcf_client_instance.Endpoint.Binding.ReceiveTimeout = new TimeSpan(0, 5, 0);
		#endif

		wcf_client_instance.Endpoint.Address = _end_point_address;
	}
}

不过这是vs2008+sp1+sl3的代码。

[海涵德]

这些仅是调用wcf时的时间设置，本想看看能不能给你点提示，你的问题也是我经常遇到的，应该是属于wcf的保护吧。

[bigzoom]

我是做了这方面考虑的，下面是我的代码，不过即使设置了各个Timeout属性不同的时间值，还是会存在这种问题。

public static T Create()
        {
            BasicHttpBinding basicHttpBinding = new BasicHttpBinding(BasicHttpSecurityMode.None);
            basicHttpBinding.MaxReceivedMessageSize = Int32.MaxValue;
            basicHttpBinding.MaxBufferSize = Int32.MaxValue;
            basicHttpBinding.ReceiveTimeout = TimeSpan.FromMinutes(2);
            basicHttpBinding.OpenTimeout = TimeSpan.FromMinutes(2);
            basicHttpBinding.SendTimeout = TimeSpan.FromMinutes(2);
            basicHttpBinding.CloseTimeout = TimeSpan.FromMinutes(1);
            return (T)Activator.CreateInstance(_ServiceType, basicHttpBinding, EndPointAddress);
        }