嘗試在MonoDroid中使用WCF時出錯

Question

我正在使用MonoDroid for C＃創建一個概念Android應用程序的概念。 到目前爲止，它看起來不錯。然而，當我使用WCF時，我遇到了麻煩。

這個概念很簡單，用一個名爲「Ping」的方法創建一個返回字符串「Pong」的WCF服務。寫了一個WPF應用程序擊中了服務並且工作正常。但是當嘗試點擊服務時，android應用程序給了我一個奇怪的錯誤。

首先，我得到

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 

此錯誤是在服務器端

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

這個接口是服務器端類

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

服務器端工作正常因爲我的測試WPF應用程序擊中罰款。

Android客戶端端接口使用異步模式，但在使用直接同步調用服務時會導致相同的錯誤。

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

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

    string EndPing(IAsyncResult result); 
} 

這是客戶 「代理」 類

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); 
    } 
} 

這是做呼叫的代碼。

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(); 
} 

我希望有人會知道一個解決方案或可以給我一個不同的方法。

Answer 1

如果您可以將您的服務作爲.Net 2.0樣式的Web服務公開，那麼Mono（MonoDroid）會更好地支持這些服務。