WCF http binding

Question

I create a wcf service application and a asp.net mvc project(as client). I added my wcf service via Add Service Reference file to my asp.net mvc reference. I use Entity Framework to connect DB in my wcf application. I have a UserManagement.svc.cs service. This is my UserManagement.svc.cs codes:

 public class UserManagement : IUserManagement
{
    iFlowEntities db = new iFlowEntities();

    public void AddRole(role role)
    {
        db.roles.Add(role);
        db.SaveChanges();
    }

    public List<role> RoleList()
    {
        List<role> roles;
        roles =  db.roles.ToList();
        return roles;
    }

}

And I use this service in my UserController in RoleList() action in asp.net mvc and this is that action code:

    public ActionResult RoleList()
    {
        IList<UserManagement.role> roles = new List<UserManagement.role>();
        roles = UserClient.RoleList();
        return View("_RoleList",roles);
    }

and UserClient variable define in controller body like: UserManagement.UserManagementClient UserClient = new UserManagement.UserManagementClient();

When I run asp.net project I get this error:

An error occurred while receiving the HTTP response to http://localhost:1730/UserManagement.svc. This could be due to the service endpoint binding not using the HTTP protocol. This could also be due to an HTTP request context being aborted by the server (possibly due to the service shutting down).

I googled and see multiple answer and test them but don't have result for me and this answer like this and this and this.

And this is my wcf service config file:

<?xml version="1.0" encoding="utf-8"?>
<configuration>
  <configSections>
    <!-- For more information on Entity Framework configuration, visit http://go.microsoft.com/fwlink/?LinkID=237468 -->
    <section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
  </configSections>
  <appSettings>
    <add key="aspnet:UseTaskFriendlySynchronizationContext" value="true" />
  </appSettings>
  <system.web>
    <compilation debug="true" targetFramework="4.5" />
    <httpRuntime maxRequestLength ="262144" executionTimeout="103600" targetFramework="4.5" />
  </system.web>
  <system.serviceModel>
    <behaviors>
      <serviceBehaviors>
        <behavior>
          <!-- To avoid disclosing metadata information, set the values below to false before deployment -->
          <serviceMetadata httpGetEnabled="true" httpsGetEnabled="true" />
          <dataContractSerializer maxItemsInObjectGraph="2147483647"/>
          <!-- 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>
    <protocolMapping>
      <add binding="wsHttpBinding" scheme="https" />
    </protocolMapping>
    <serviceHostingEnvironment aspNetCompatibilityEnabled="true" multipleSiteBindingsEnabled="true" />
  </system.serviceModel>
  <system.webServer>
    <modules runAllManagedModulesForAllRequests="true" />
    <!--
        To browse web app root directory during debugging, set the value below to true.
        Set to false before deployment to avoid disclosing web app folder information.
      -->
    <directoryBrowse enabled="true" />
  </system.webServer>
  <connectionStrings>
    <add name="iFlowEntities" connectionString="metadata=res://*/Model.DBContext.csdl|res://*/Model.DBContext.ssdl|res://*/Model.DBContext.msl;provider=System.Data.SqlClient;provider connection string=&quot;data source=.;initial catalog=iFlow;integrated security=True;MultipleActiveResultSets=True;App=EntityFramework&quot;" providerName="System.Data.EntityClient" />
  </connectionStrings>
  <entityFramework>
    <defaultConnectionFactory type="System.Data.Entity.Infrastructure.LocalDbConnectionFactory, EntityFramework">
      <parameters>
        <parameter value="v11.0" />
      </parameters>
    </defaultConnectionFactory>
    <providers>
      <provider invariantName="System.Data.SqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer" />
    </providers>
  </entityFramework>
</configuration>

Edited:

Yes, I add DataContract and DataMember to my class and ServiceContract and OperationContract.

This is my client config file:

<?xml version="1.0" encoding="utf-8"?>
<!--
  For more information on how to configure your ASP.NET application, please visit
  http://go.microsoft.com/fwlink/?LinkId=301880
  -->
<configuration>
  <configSections>
    <!-- For more information on Entity Framework configuration, visit http://go.microsoft.com/fwlink/?LinkID=237468 -->
    <section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
  </configSections>
  <appSettings>
    <add key="webpages:Version" value="3.0.0.0" />
    <add key="webpages:Enabled" value="false" />
    <add key="ClientValidationEnabled" value="true" />
    <add key="UnobtrusiveJavaScriptEnabled" value="true" />
  </appSettings>
  <system.web>
    <compilation debug="true" targetFramework="4.5" />
    <httpRuntime targetFramework="4.5" />
  </system.web>
  <runtime>
    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
      <dependentAssembly>
        <assemblyIdentity name="System.Web.Helpers" publicKeyToken="31bf3856ad364e35" />
        <bindingRedirect oldVersion="1.0.0.0-3.0.0.0" newVersion="3.0.0.0" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="System.Web.WebPages" publicKeyToken="31bf3856ad364e35" />
        <bindingRedirect oldVersion="1.0.0.0-3.0.0.0" newVersion="3.0.0.0" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="System.Web.Mvc" publicKeyToken="31bf3856ad364e35" />
        <bindingRedirect oldVersion="1.0.0.0-5.2.3.0" newVersion="5.2.3.0" />
      </dependentAssembly>
    </assemblyBinding>
  </runtime>
  <entityFramework>
    <defaultConnectionFactory type="System.Data.Entity.Infrastructure.LocalDbConnectionFactory, EntityFramework">
      <parameters>
        <parameter value="v11.0" />
      </parameters>
    </defaultConnectionFactory>
    <providers>
      <provider invariantName="System.Data.SqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer" />
    </providers>
  </entityFramework>
  <system.serviceModel>
    <bindings>
      <basicHttpBinding>
        <binding name="BasicHttpBinding_IUserManagement" />
        <binding name="BasicHttpBinding_IDepartmentManagement" />
      </basicHttpBinding>
    </bindings>
    <client>
      <endpoint address="http://localhost:1730/UserManagement.svc"
        binding="basicHttpBinding" bindingConfiguration="BasicHttpBinding_IUserManagement"
        contract="UserManagement.IUserManagement" name="BasicHttpBinding_IUserManagement" />
      <endpoint address="http://localhost:1730/DepartmentManagement.svc"
        binding="basicHttpBinding" bindingConfiguration="BasicHttpBinding_IDepartmentManagement"
        contract="DepartmentManagement.IDepartmentManagement" name="BasicHttpBinding_IDepartmentManagement" />
    </client>
  </system.serviceModel>
</configuration>

Answer 1

According to my experience i think this issue is an Entity Framework matter. Whenever you return Entities in WCF Service, it tries to return entities with its relations while WCF can't serialize them for client. To solve this issue simply disable Proxy Creation option in DbContext constructor:

public class iFlowEntities : DbContext
{
    public iFlowEntities()
    {
        Configuration.ProxyCreationEnabled = false;
    }
}