Question

我正在使用MonoDroid for C＃创建一个概念Android应用程序。到目前为止看起来还不错。但是，在使用WCF时，我遇到了麻烦。

概念很简单，使用一个名为“Ping”的方法创建一个WCF服务，该方法返回一个字符串“Pong”。写了一个WPF应用程序命中服务，它的工作正常。但是当试图点击服务时，Android应用程序给了我一个奇怪的错误。

首先是我得到的错误

System.TypeLoadException: Could not load type '__clientproxy_IService1' from assembly 'dummy, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null'.
  at System.MonoType.GetMethodImpl (System.String name, BindingFlags bindingAttr, System.Reflection.Binder binder, CallingConventions callConvention, System.Type[] types, System.Reflection.ParameterModifier[] modifiers) [0x00000] in <filename unknown>:0 
  at System.Type.GetMethod (System.String name, BindingFlags bindingAttr, System.Reflection.Binder binder, CallingConventions callConvention, System.Type[] types, System.Reflection.ParameterModifier[] modifiers) [0x00000] in <filename unknown>:0 
  at System.Type.GetMethod (System.String name, System.Type[] types) [0x00000] in <filename unknown>:0 
  at Mono.CodeGeneration.CodeMethod.UpdateMethodBase (System.Type type) [0x00000] in <filename unknown>:0 
  at Mono.CodeGeneration.CodeClass.CreateType () [0x00000] in <filename unknown>:0 
  at System.ServiceModel.ProxyGeneratorBase.CreateProxyTypeOperations (System.Type crtype, Mono.CodeGeneration.CodeClass c, System.ServiceModel.Description.ContractDescription cd) [0x00000] in <filename unknown>:0 
  at System.ServiceModel.ClientProxyGenerator.CreateProxyType (System.Type requestedType, System.ServiceModel.Description.ContractDescription cd, Boolean duplex) [0x00000] in <filename unknown>:0 
  at System.ServiceModel.ChannelFactory`1[HelloMonoDroid.IService1].CreateChannel (System.ServiceModel.EndpointAddress address, System.Uri via) [0x00000] in <filename unknown>:0 
  at System.ServiceModel.ChannelFactory`1[HelloMonoDroid.IService1].CreateChannel (System.ServiceModel.EndpointAddress address) [0x00000] in <filename unknown>:0 
  at System.ServiceModel.ChannelFactory`1[HelloMonoDroid.IService1].CreateChannel () [0x00000] in <filename unknown>:0 
  at System.ServiceModel.ClientBase`1[HelloMonoDroid.IService1].CreateChannel () [0x00000] in <filename unknown>:0 
  at System.ServiceModel.ClientBase`1[HelloMonoDroid.IService1].get_InnerChannel () [0x00000] in <filename unknown>:0 
  at System.ServiceModel.ClientBase`1[HelloMonoDroid.IService1].get_Channel () [0x00000] in <filename unknown>:0 
  at HelloMonoDroid.ClientTest.BeginPing (System.AsyncCallback callback, System.Object asyncState) [0x00000] in <filename unknown>:0 
  at HelloMonoDroid.Activity1.button_Click (System.Object sender, System.EventArgs e) [0x00000] in <filename unknown>:0

这是服务器端的接口

[ServiceContract]
public interface IService1
{
    [OperationContract]
    string Ping();
}

这是服务器端类

public class Service1 : IService1
{
    public string Ping()
    {
        return "Pong";
    }
}

服务器端工作正常，因为我的测试WPF应用程序可以正常运行。

Android客户端界面使用异步模式，但在使用对服务的直接同步调用时会出现相同的错误。

[ServiceContract]
public interface IService1
{
    [OperationContract]
    string Ping();

    [OperationContract(AsyncPattern = true)]
    IAsyncResult BeginPing(AsyncCallback callback, object asyncState);

    string EndPing(IAsyncResult result);
}

这是客户端“代理”类

class ClientTest : ClientBase<IService1>, IService1
{
    public ClientTest(Binding binding, EndpointAddress address)
        : base(binding, address)
    {

    }

    public string Ping()
    {
        return Channel.Ping();
    }

    public IAsyncResult BeginPing(AsyncCallback callback, object asyncState)
    {
        return Channel.BeginPing(callback, asyncState);
    }

    public string EndPing(IAsyncResult result)
    {
        return Channel.EndPing(result);
    }
}

这是进行通话的代码。

void CallServer(object sender, EventArgs e)
{
    var myBinding = new BasicHttpBinding();
    var myEndpointAddress = new EndpointAddress("http://mycomputername:8732/Android/");
    _proxy = new ClientTest(myBinding, myEndpointAddress);
    _proxy.BeginPing(OnCompletion, null);
}

void OnCompletion(IAsyncResult result)
{
    string str = _proxy.EndPing(result);
    textbox.Text = "Result is: " + str;
    result.AsyncWaitHandle.Close();
}

我希望有人知道解决方案，或者可能会给我一个不同的方法。

Answer 1

如果您可以将服务公开为.Net 2.0样式的Web服务，Mono（以及MonoDroid）可以更好地支持这些服务。

尝试在MonoDroid中使用WCF时出错

1 个答案: