我使用WCF创建了一项服务但无法连接到它,我不断收到以下错误:
无法连接到net.tcp:// localhost:5555 / ControlChannel。该 连接尝试持续时间跨度为00:00:02.0139182。 TCP 错误代码10061:因为目标无法建立连接 机器主动拒绝它127.0.0.1:5555。
这是代码:
合同:
[ServiceContract(CallbackContract = typeof(IControlChannelCallback))]
public interface IControlChannel
{
[OperationContract]
void Join();
}
CallBackContract:
public interface IControlChannelCallback
{
[OperationContract(IsOneWay = true)]
void ShowMessage(string message);
}
服务:
[ServiceBehavior(ConcurrencyMode = ConcurrencyMode.Single, IncludeExceptionDetailInFaults = true)]
public sealed class ControlChannel : IControlChannel
{
public static readonly IList<IControlChannelCallback> Callbacks = new List<IControlChannelCallback>();
public void Join()
{
var client = OperationContext.Current.GetCallbackChannel<IControlChannelCallback>();
if (!Callbacks.Contains(client))
Callbacks.Add(client);
client.ShowMessage("This message came from the server");
}
}
服务器:
public MainForm()
{
InitializeComponent();
using (var host = new ServiceHost(typeof(ControlChannel)))
{
host.Open();
}
}
客户端:
public MainForm()
{
InitializeComponent();
var callback = new ControlChannelCallbackClient();
using (var factory = new DuplexChannelFactory<IControlChannel>(callback, "Client"))
{
var proxy = factory.CreateChannel();
proxy.Join();
}
}
App.config客户端:
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<startup>
<supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5" />
</startup>
<system.serviceModel>
<client>
<endpoint name="Client"
contract="Service.Contracts.Interfaces.IControlChannel"
binding="netTcpBinding"
address="net.tcp://localhost:5555/ControlChannel" />
</client>
</system.serviceModel>
</configuration>
App.config服务器
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<startup>
<supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5" />
</startup>
<system.serviceModel>
<services>
<service name="Service.Contracts.Objects.ControlChannel">
<endpoint contract="Service.Contracts.Interfaces.IControlChannel"
binding="netTcpBinding"
address="net.tcp://localhost:5555/ControlChannel" >
</endpoint>
</service>
</services>
</system.serviceModel>
</configuration>
我做错了什么?这是一个代码问题还是我应该开始在其他地方寻找问题?
答案 0 :(得分:7)
只是预感,但我怀疑没有什么可听的,因为即使主持您的服务的应用程序可能仍在运行,服务主机也不会。在你的构造函数中:
public MainForm()
{
InitializeComponent();
using (var host = new ServiceHost(typeof(ControlChannel)))
{
host.Open();
}
}
您在ServiceHost
块中有using
- 一旦使用块退出(在构造函数完成之前),ServiceHost
将被关闭并被丢弃。
将你的代码改为此:
public MainForm()
{
InitializeComponent();
var host = new ServiceHost(typeof(ControlChannel))
host.Open();
}
您可以挂钩应用程序关闭事件,以便在程序运行结束时关闭ServiceHost
。
我还建议将host.Open()
包装在try-catch块中,以防尝试打开它时出现问题。