[英]Silverlight client consuming WCF service
Please bear with me as I am new to WCF services/ Windows services. 请耐心等待,因为我是WCF服务/ Windows服务的新手。 I've created a WCF service hosted in a Windows service.
我创建了Windows服务中托管的WCF服务。 I want to consume that WCF service in a Silverlight in-browser application over TCP.
我想通过TCP在Silverlight浏览器中的应用程序中使用该WCF服务。 Below is the code fragment in Silverlight to access WCF service:
下面是Silverlight中访问WCF服务的代码片段:
var messageEncoding = new BinaryMessageEncodingBindingElement();
var tcpTransport = new TcpTransportBindingElement();
var binding = new CustomBinding(messageEncoding, tcpTransport);
// Create a channel factory for the service endpoint configured with the custom binding.
var cf = new ChannelFactory<ICalcService>(binding, new EndpointAddress("net.tcp://192.168.2.104:4508"));
// Open the channel.
ICalcService channel = cf.CreateChannel();
// Invoke the method asynchronously.
channel.BeginAdd(9, 5, AddCallback, channel);
private void AddCallback(IAsyncResult asyncResult)
{
try
{
double endAdd = ((ICalcService) asyncResult.AsyncState).EndAdd(asyncResult);
}
catch (Exception exception)
{
throw exception;
}
}
The code works fine sometimes but often it throws an infamous System.ServiceModel.CommunicationException with the following message for some reasons: 该代码有时可以正常工作,但由于某些原因,它通常会引发臭名昭著的System.ServiceModel.CommunicationException并显示以下消息:
Could not connect to net.tcp://192.168.2.104:4508/. The connection attempt lasted for a time span of 00:00:00.1010058. TCP error code 10013: An attempt was made to access a socket in a way forbidden by its access permissions.. This could be due to attempting to access a service in a cross-domain way while the service is not configured for cross-domain access. You may need to contact the owner of the service to expose a sockets cross-domain policy over HTTP and host the service in the allowed sockets port range 4502-4534.
The innerException of type System.Net.Sockets.SocketException says 类型System.Net.Sockets.SocketException的innerException说
An attempt was made to access a socket in a way forbidden by its access permissions.
What are the possible reasons behind this exceptions? 此异常背后的可能原因是什么? Based on what I investigated so far, I could find only one reason: Improper ClientAccessPolicy.xml .
根据到目前为止的调查,我只能找到一个原因: ClientAccessPolicy.xml不正确。 What may be the other reasons?
可能还有其他原因吗? If you have any useful resources, please provide me the same.
如果您有任何有用的资源,请提供相同的信息。 One more question, if I want to make Windows service hosted WCF service to get consumed by other machines on LAN, what settings do I have to make?
还有一个问题,如果我想让Windows服务托管的WCF服务被LAN上的其他计算机占用,我必须进行哪些设置? Eg firewall settings?
例如防火墙设置? My code cannot access WCF service on other machine.
我的代码无法访问其他计算机上的WCF服务。 It throws the same exception I mentioned above.
它引发了我上面提到的相同异常。 Any ideas about how to get rid of this exception?
关于如何摆脱此异常的任何想法?
Problem sorted..!! 问题排序.. !! I had to do following things:
我必须做以下事情:
1) Specified SecurityMode.None
while creating NetTcpBinding
in Windows service. 1)在Windows服务中创建
NetTcpBinding
指定了SecurityMode.None
。
2) Created an Inbound Rule in Windows Firewall With Advanced Security to allow TCP traffic on the port I specified in the end point address. 2)在具有高级安全性的Windows防火墙中创建了入站规则 ,以允许在端点地址中指定的端口上进行TCP通信。
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