代码之家 › 专栏 › 技术社区 › Igor Zevaka

在Windows Phone 7上使用WCF的System.UnsupportedException

windows-phone-7 silverlight-4.0 wcf

4

Igor Zevaka · 技术社区 · 15 年前

是否有人能够在WindowsPhoneSeries 7模拟器上使用WCF进行通信?

过去两天我一直在努力,但这一切都发生在我身上。我可以让一个普通的silverlight控件同时在silverlight 3和silverlight 4中工作,但不能在手机版本中工作。我试过两个版本:

版本1-使用异步模式

BasicHttpBinding basicHttpBinding = new BasicHttpBinding();
EndpointAddress endpointAddress = new EndpointAddress("http://localhost/wcf/Authentication.svc");
Wcf.IAuthentication auth1 = new ChannelFactory<Wcf.IAuthentication>(basicHttpBinding, endpointAddress).CreateChannel(endpointAddress);

AsyncCallback callback = (result) =>
{

    Action<string> write = (str) =>
    {
        this.Dispatcher.BeginInvoke(delegate
        {
            //Display something
        });
    };

    try
    {
        Wcf.IAuthentication auth = result.AsyncState as Wcf.IAuthentication;
        Wcf.AuthenticationResponse response = auth.EndLogin(result);
        write(response.Success.ToString());
    }
    catch (Exception ex)
    {
        write(ex.Message);
        System.Diagnostics.Debug.WriteLine(ex.Message);
    }
};

auth1.BeginLogin("user0", "test0", callback, auth1);

此版本在此行中断:

Wcf.IAuthentication auth1 = new ChannelFactory<Wcf.IAuthentication>(basicHttpBinding, endpointAddress).CreateChannel(endpointAddress);

投掷 System.NotSupportedException . 异常不是很有描述性,调用堆栈也不是很有帮助:

_{at System.ServiceModel.DiagnosticUtility.ExceptionUtility.BuildMessage(Exception x)
   at System.ServiceModel.DiagnosticUtility.ExceptionUtility.LogException(Exception x)
   at System.ServiceModel.DiagnosticUtility.ExceptionUtility.ThrowHelperError(Exception e)
   at System.ServiceModel.ChannelFactory`1.CreateChannel(EndpointAddress address)
   at WindowsPhoneApplication2.MainPage.DoLogin()
   ....}

版本2-阻止WCF调用

下面是不使用异步模式的版本。

[System.ServiceModel.ServiceContract]
public interface IAuthentication
{
    [System.ServiceModel.OperationContract]
    AuthenticationResponse Login(string user, string password);
}

public class WcfClientBase<TChannel> : System.ServiceModel.ClientBase<TChannel> where TChannel : class {
        public WcfClientBase(string name, bool streaming)
            : base(GetBinding(streaming), GetEndpoint(name)) {
            ClientCredentials.UserName.UserName = WcfConfig.UserName;
            ClientCredentials.UserName.Password = WcfConfig.Password;
        }
        public WcfClientBase(string name) : this(name, false) {}

        private static System.ServiceModel.Channels.Binding GetBinding(bool streaming) {
            System.ServiceModel.BasicHttpBinding binding = new System.ServiceModel.BasicHttpBinding();
            binding.MaxReceivedMessageSize = 1073741824;
            if(streaming) {
                //binding.TransferMode = System.ServiceModel.TransferMode.Streamed;
            }
            /*if(XXXURLXXX.StartsWith("https")) {
                binding.Security.Mode = BasicHttpSecurityMode.Transport;
                binding.Security.Transport.ClientCredentialType = HttpClientCredentialType.None;
            }*/
            return binding;
        }

        private static System.ServiceModel.EndpointAddress GetEndpoint(string name) {
            return new System.ServiceModel.EndpointAddress(WcfConfig.Endpoint + name + ".svc");
        }

        protected override TChannel CreateChannel()
        {
            throw new System.NotImplementedException();
        }
    }


auth.Login("test0", "password0");

此版本崩溃 System.ServiceModel.ClientBase<TChannel> 构造器。调用堆栈有点不同:

_{at System.Reflection.MethodInfo.get_ReturnParameter()
   at System.ServiceModel.Description.ServiceReflector.HasNoDisposableParameters(MethodInfo methodInfo)
   at System.ServiceModel.Description.TypeLoader.CreateOperationDescription(ContractDescription contractDescription, MethodInfo methodInfo, MessageDirection direction, ContractReflectionInfo reflectionInfo, ContractDescription declaringContract)
   at System.ServiceModel.Description.TypeLoader.CreateOperationDescriptions(ContractDescription contractDescription, ContractReflectionInfo reflectionInfo, Type contractToGetMethodsFrom, ContractDescription declaringContract, MessageDirection direction)
   at System.ServiceModel.Description.TypeLoader.CreateContractDescription(ServiceContractAttribute contractAttr, Type contractType, Type serviceType, ContractReflectionInfo& reflectionInfo, Object serviceImplementation)
   at System.ServiceModel.Description.TypeLoader.LoadContractDescriptionHelper(Type contractType, Type serviceType, Object serviceImplementation)
   at System.ServiceModel.Description.TypeLoader.LoadContractDescription(Type contractType)
   at System.ServiceModel.ChannelFactory1.CreateDescription()
   at System.ServiceModel.ChannelFactory.InitializeEndpoint(Binding binding, EndpointAddress address)
   at System.ServiceModel.ChannelFactory1..ctor(Binding binding, EndpointAddress remoteAddress)
   at System.ServiceModel.ClientBase1..ctor(Binding binding, EndpointAddress remoteAddress)
   at Wcf.WcfClientBase1..ctor(String name, Boolean streaming)
   at Wcf.WcfClientBase`1..ctor(String name)
   at Wcf.AuthenticationClient..ctor()
   at WindowsPhoneApplication2.MainPage.DoLogin()
   ...}

有什么想法吗?

4 回复 | 直到 13 年前

1

7

Indy9000 13 年前

正如Scottmarlowe所指出的那样,自动生成的服务引用只是起作用。我的任务是弄清楚为什么这个该死的东西能用,而手动版本却不行。

我找到了罪犯 ChannelFactory . 不知为什么 new ChannelFactory<T>().CreateChannel() 只是抛出一个例外。我找到的唯一解决方案是提供您自己的通道实现。这包括:

覆盖客户端。(可选)。
重写clientbase.createchannel。(可选)。
使用wcf接口的特定实现子类channelbase

现在,clientbase已经通过 渠道工厂 财产。如果你只是打电话 CreateChannel 你会得到同样的例外。您需要从内部实例化在步骤3中定义的通道 创建频道 .

这是一个基本的线框,它是如何把所有的看起来放在一起的。

[DataContractAttribute]
public partial class AuthenticationResponse {
[DataMemberAttribute]
public bool Success {
    get; set;
}

[System.ServiceModel.ServiceContract]
public interface IAuthentication
{
    [System.ServiceModel.OperationContract(AsyncPattern = true)]
    IAsyncResult BeginLogin(string user, string password, AsyncCallback callback, object state);
    AuthenticationResponse EndLogin(IAsyncResult result);
}

public class AuthenticationClient : ClientBase<IAuthentication>, IAuthentication {

    public AuthenticationClient(System.ServiceModel.Channels.Binding b, EndpointAddress ea):base(b,ea)
    {
    }

    public IAsyncResult BeginLogin(string user, string password, AsyncCallback callback, object asyncState)
    {
        return base.Channel.BeginLogin(user, password, callback, asyncState);
    }

    public AuthenticationResponse EndLogin(IAsyncResult result)
    {
        return Channel.EndLogin(result: result);
    }

    protected override IAuthentication CreateChannel()
    {
        return new AuthenticationChannel(this);
    }

    private class AuthenticationChannel : ChannelBase<IAuthentication>, IAuthentication
    {
        public AuthenticationChannel(System.ServiceModel.ClientBase<IAuthentication> client)
        : base(client)
        {
        }

        public System.IAsyncResult BeginLogin(string user, string password, System.AsyncCallback callback, object asyncState)
        {
            object[] _args = new object[2];
            _args[0] = user;
            _args[1] = password;
            System.IAsyncResult _result = base.BeginInvoke("Login", _args, callback, asyncState);
            return _result;
        }

        public AuthenticationResponse EndLogin(System.IAsyncResult result)
        {
            object[] _args = new object[0];
            AuthenticationResponse _result = ((AuthenticationResponse)(base.EndInvoke("Login", _args, result)));
            return _result;
        }
    }
}

TLDR; 如果要在wp7上使用自己的wcf代码,则需要创建自己的通道类,而不依赖于 渠道工厂 .

2

1

Vijay Verma 15 年前

Windows Phone不支持使用channelFactory.createChannel()创建动态代理。这里有记录- http://msdn.microsoft.com/en-us/library/ff426930(VS.96).aspx

使用异步模式中的“添加服务引用”机制使用服务是正确的方法。

3

1

Andy Pennell 14 年前

我写了一篇关于这个主题的博文: http://blogs.msdn.com/b/andypennell/archive/2010/09/20/using-wcf-on-windows-phone-7-walk-through.aspx

4

0

Scott Marlowe 15 年前

我没有遇到任何问题,但我走了“添加服务引用…”的路线,我不得不通过“VS2010 Express for Windows Phone”b/c VS2010 RC还不支持WP7开发的功能。express版本随wp7开发人员的安装一起提供。