WCF DataContract，DataMember问题

Question

我有以下课程， DBConn用于数据库连接， UserBL类用于处理外部用户功能， SpeakerVO类用于处理实体属性， SpeakerBL类用于处理业务层方法， 用于服务层接口的ICustomerService， CustServiceManager类用于处理服务层方法

问题是当你调用服务层方法适当地传递User类时，但仍然是CustServiceManager类，ViewAll方法是_user 参数变为空

Windows应用程序中的客户端调用代码位于

之下

public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            UserBL _user = new UserBL();

            string ConStrng = ConfigurationSettings.AppSettings["ConnectionString1"];
            _user.SetConnection(ConStrng);

            SpeakerReference.CustomerServiceClient x = new SpeakerReference.CustomerServiceClient();
            x.ViewAll(_user);

        }
    }  



namespace CodeCamper.DataLayer
{
    [DataContract]
        public class DBConn
        {      

            private string mstr_username;
            private string mstr_password;
            private string mstr_server;
            private string mstr_database;

            private string mstr_connectionString;
            private IDbConnection mcon_thisConnection;

            [DataMember]
            public IDbConnection MyConnection
            {
                get { return mcon_thisConnection; }
            }
            public DBConn(string connectionstr)
            {
                mcon_thisConnection = new SqlConnection(connectionstr);
            }  

        }
}

namespace CodeCamper.BusinessLayer
{
    [DataContract]
    public class UserBL
    {
        private DBConn _DB;

        //[DataMember]
        public DBConn db
        {
            get { return _DB; }
            set { _DB = value; }
        }

        public void SetConnection(string connectionstr)
        {
            _DB = new DBConn(connectionstr);
        }       

    }
}

namespace CodeCamper.EntityLayer.Transaction
{
    [DataContract]
    public class SpeakerVO
    {
        private string _SpeakerID;
        private string _SpeakerName;
        private string _SpeakerSurname;
        private string _Email;
        private string _Twitter;
        private string _Blog;
        private string _Bio; //list like entry
        private string _ImagePath;

        [DataMember]
        public string SpeakerID
        {
            get { return _SpeakerID; }
            set { _SpeakerID = value; }
        }

        [DataMember]
        public string SpeakerName
        {
            get { return _SpeakerName; }
            set { _SpeakerName = value; }
        }

        [DataMember]
        public string SpeakerSurname
        {
            get { return _SpeakerSurname; }
            set { _SpeakerSurname = value; }
        }

        [DataMember]
        public string Email
        {
            get { return _Email; }
            set { _Email = value; }
        }

        [DataMember]
        public string Twitter
        {
            get { return _Twitter; }
            set { _Twitter = value; }
        }

        [DataMember]
        public string Blog
        {
            get { return _Blog; }
            set { _Blog = value; }
        }
        [DataMember]
        public string Bio
        {
            get { return _Bio; }
            set { _Bio = value; }
        }
        [DataMember]
        public string ImagePath
        {
            get { return _ImagePath; }
            set { _ImagePath = value; }
        }
    }
}

namespace CodeCamper.BusinessLayer.Transaction
{
   [ServiceContract]
    public class SpeakerBL : SpeakerVO
    {
        private UserBL _user;

        #region -Constructor-
        public SpeakerBL(UserBL user)
        {
            //ID = null;
            //Code = string.Empty;
            //Name = string.Empty;
            _user = user;
        }
        #endregion

        #region -Methods-

        [OperationContract]
        public static List<SpeakerVO> ViewAll(UserBL _user)
        {
            List<SpeakerVO> _tmpresult = null;

            try
            {
                SpeakerDL ContainerTable = new SpeakerDL(_user.db, null);

                _tmpresult = ContainerTable.ViewAll();

            }
            catch (Exception er)
            {
                throw er;
            }
            return _tmpresult;
        }

        #endregion
    }
}


namespace CodeCamper.ServiceLayer
{
     [ServiceContract]
    public interface ICustomerService
    {
         [OperationContract]
         List<SpeakerVO> ViewAll(UserBL _user);
    }
}

namespace CodeCamper.ServiceLayer
{
    public class CustServiceManager : ICustomerService
    {

        public List<SpeakerVO> ViewAll(UserBL _user)
        {
            List<SpeakerVO> _tmpresult = null;

            try
            {

                _tmpresult = SpeakerBL.ViewAll(_user);

            }
            catch (Exception ex)
            {                
                throw ex;
            }

            return _tmpresult;
        }        
    }
}

客户端配置文件位于

之下

<?xml version="1.0" encoding="utf-8"?>
<configuration>
    <startup> 
        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5.1"/>
    </startup>
  <appSettings>
    <add key="ConnectionString1" value="Data Source=C008;Initial Catalog=sample;Persist Security Info=True;User ID=sa;password=ssa@123"/>
  </appSettings>
  <system.serviceModel>
    <bindings>
      <basicHttpBinding>
        <binding name="BasicHttpBinding_ICustomerService" />
      </basicHttpBinding>
    </bindings>
    <client>
      <endpoint address="http://localhost:8733/Design_Time_Addresses/CodeCamper.ServiceLayer/CustomerService/"
        binding="basicHttpBinding" bindingConfiguration="BasicHttpBinding_ICustomerService"
        contract="SpeakerReference.ICustomerService" name="BasicHttpBinding_ICustomerService" />
    </client>
  </system.serviceModel>
</configuration>

服务层配置文件位于

之下

<?xml version="1.0" encoding="utf-8"?>
<configuration>

  <appSettings>
    <add key="aspnet:UseTaskFriendlySynchronizationContext" value="true"/>
  </appSettings>
  <system.web>
    <compilation debug="true"/>
  </system.web>
  <!-- When deploying the service library project, the content of the config file must be added to the host's 
  app.config file. System.Configuration does not support config files for libraries. -->
  <system.serviceModel>
    <services>
      <service name="CodeCamper.ServiceLayer.CustServiceManager">
        <endpoint address="" binding="basicHttpBinding" contract="CodeCamper.ServiceLayer.ICustomerService">
          <identity>
            <dns value="localhost" />
          </identity>
        </endpoint>
        <endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange" />
        <host>
          <baseAddresses>
            <add baseAddress="http://localhost:8733/Design_Time_Addresses/CodeCamper.ServiceLayer/CustomerService/" />
          </baseAddresses>
        </host>
      </service>
    </services>
    <behaviors>
      <serviceBehaviors>
        <behavior>
          <!-- To avoid disclosing metadata information, 
          set the values below to false before deployment -->
          <serviceMetadata httpGetEnabled="True" httpsGetEnabled="True"/>
          <!-- To receive exception details in faults for debugging purposes, 
          set the value below to true.  Set to false before deployment 
          to avoid disclosing exception information -->
          <serviceDebug includeExceptionDetailInFaults="False"/>
        </behavior>
      </serviceBehaviors>
    </behaviors>
  </system.serviceModel>

<startup><supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5.1"/></startup></configuration>