WCF 将复杂对象接收为 null答案

【问题标题】：WCF recieves a complex object as nullWCF 将复杂对象接收为 null
【发布时间】：2014-07-25 01:35:39
【问题描述】：

在论坛 [StackOverFlow][1] 上的另一个帖子中获得输入后

[1]:Getting a nullreference when passing a complex object from KSOAP2 to WCF 我是否得出结论认为我的问题出在 WCF 服务本身。该服务似乎无法理解它正在接收的对象。

无论我做什么，传递的对象始终为空。

我什至尝试过显式声明数据成员，即使它在当前版本的 WCF 中不是必需的。

这是我试图通过 WCF 传递的类：

namespace ModelLayer
{

        [DataContract]
        public class User   
        {
            [DataMember]
            public int Id { get; set; }
            [DataMember]
            public string UserName { get; set; }
            [DataMember]
            public string Mac { get; set; }

            public User()
            {

            }
        }
    }

我的服务接口：

[ServiceContract (Namespace = "http://nordahl.org/")]
    public interface IWcfFoodAndAllergi
    {

        [OperationContract]
        int InsertUser(User _user);

        [OperationContract]
        User GetUser(string _mac);

        [OperationContract]
        int InsertRecipe(Recipe _recipe);

        [OperationContract]
        List<Recipe> GetRecipeByAllergi(List<Allergies> _allergies);

        [OperationContract]
        List<Recipe> GetRecipeByType(string _type);

        [OperationContract]
        List<Recipe> GetRecipeByName(string _name);


    }

}

最后是 webconfig 文件本身：

<?xml version="1.0" encoding="utf-8"?>
<configuration>
  <appSettings>
    <add key="aspnet:UseTaskFriendlySynchronizationContext" value="true" />
  </appSettings>
  <system.web>
    <compilation debug="true" targetFramework="4.5" />
    <httpRuntime targetFramework="4.5" maxRequestLength="1048576"/>
  </system.web>
  <system.webServer>
    <security>
      <requestFiltering>
        <requestLimits maxAllowedContentLength="1073741824" />
        <fileExtensions allowUnlisted="true">
          <remove fileExtension=".cs"/>
          <add fileExtension=".cs" allowed="true"/>

        </fileExtensions>
      </requestFiltering>
    </security>
  </system.webServer>
  <system.serviceModel>

          <services>
      <service name="WcfFoodAndAllergi.WcfFoodAndAllergi">
        <!-- Use a bindingNamespace to eliminate tempuri.org -->
        <endpoint address=""
                  binding ="basicHttpBinding" 
                  bindingNamespace="http://nordahl.org/"
                  contract="WcfFoodAndAllergi.IWcfFoodAndAllergi"
        />
      </service>
    </services>


    <behaviors>
      <serviceBehaviors>
        <behavior name ="">
          <!-- 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>
    <protocolMapping>
        <add binding="basicHttpsBinding" 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>

</configuration>

【问题讨论】：

标签： c# wcf object

【解决方案1】：

当一个复杂对象在 T4 生成的类中引用另一个复杂对象时，我遇到了与您类似的问题。如果您在获取方法中使用包含，或者其他与实体相关的方法或将复杂对象相互链接的对象；您可能会收到循环引用错误。我有一个朋友向我展示了如何使用设置属性的自定义类来解决这个问题：

Complex Object won't return when using 'include' syntax in WCF with Entity Version 6

【讨论】：