C＃webservice在返回时丢失数据

Question

我正在编写调用webmethod的客户端程序，但是当我得到返回数据时，某些字段和对象上缺少值。

该webmethod依次调用WCF方法，并在WCF方法返回数据是好的。但是当它传递给web服务时，返回数据丢失了。

有什么办法解决这个问题吗？

---

这是我的客户端代码调用Web服务：

ReLocationDoc query = new ReLocationDoc(); 

    query.PerformerSiteId = 1; 
    query.PerformerUserId = 1; 
    query.FromStatus = 10; 
    query.ToStatus = 200; 

    ReLocationDoc doc = new ReLocationDoc(); 

    ServiceReference1.QPSoapClient service = new QPSoapClient(); 
    try { 
     service.GetRelocationAssignment(query, out doc); 

     string test = doc.Assignment.Id.ToString(); 

    } catch(Exception ex) { 

     MessageBox.Show(ex.Message); 
    } 

将WebMethod代码是在这里：

 [WebMethod] 
     return m_reLocationClient.GetRelocationAssignment(query, out reLocationDoc); 
    } 

，最后的WCF代码：

public ReLocationResult GetRelocationAssignment(ReLocationDoc query, out ReLocationDoc reLocationDoc) { 
     try { 
      LOGGER.Trace("Enter GetRelocationAssignment()."); 

      ReLocationResult result = reLocationCompactServiceClient.GetRelocationAssignment(out reLocationDoc, query); 

      if(reLocationDoc.Assignment == null || reLocationDoc.Assignment.CurrentStatus == STATUS_FINISHED) { 
       ReLocationDoc newQuery = new ReLocationDoc(); 
       newQuery.Assignment = new AssignmentDoc(); 
       newQuery.Assignment.EAN = DateTime.Today.ToString(); 
       newQuery.PerformerSiteId = QPSITE; 
       newQuery.PerformerUserId = QPUSER; 
       reLocationDoc.AssignmentStatus = m_settings.ReadyStatus; ; 
       result = reLocationCompactServiceClient.CreateReLocationAssignment(out reLocationDoc, newQuery); 
      } 

      return result; 

     } finally { 
      LOGGER.Trace("Exit GetRelocationAssignment()."); 
     } 
    } 

GetRelocationAssignment：

public ReLocationResult GetRelocationAssignment(ReLocationDoc query, out ReLocationDoc reLocationDoc) { 
     try { 
      LOGGER.Trace("Enter GetRelocationAssignment()."); 

      ReLocationDoc doc = new ReLocationDoc(); 
      ReLocationResult result = new ReLocationResult(); 

      new Database(Connection).Execute(delegate(DBDataContext db) { 

       User user = GetVerifiedUser(db, query, MODULE_ID); 
       SiteModule siteModule = SiteModule.Get(db, query.PerformerSiteId, MODULE_ID); 

       Status status = Status.Get(db, query.FromStatus, query.ToStatus, 0); 
       Status startStatus = Status.Get(db, query.FromStatus, 0); 
       Status endStatus = Status.Get(db, query.ToStatus, 0); 

       IQueryable<Assignment> assignments = Assignment.GetAssignmentsWithEndStatus(db, siteModule, endStatus); 
       assignments = Assignment.FilterAssignmentStartStatus(assignments, startStatus); 

       foreach(Assignment assignment in assignments) { 

        LOGGER.Debug("Handling assignment: " + assignment.Id); 

        result.Status = true; 
        AssignmentDoc assignmentDoc = FillAssignmentDoc(assignment); 
        //ReLocationDoc doc = new ReLocationDoc(); 

        AssignmentStatus sts = assignment.AssignmentStatus.OrderByDescending(ass => ass.Id).First(); 
        assignmentDoc.CurrentStatus = sts.Status.Zone; 

        Status currentStatus = sts.Status; 

        IList<Item> items = assignment.Items.ToList(); 
        IList<ItemDoc> itemDocs = new List<ItemDoc>(); 
        foreach(Item item in items) { 

         ItemDoc itemDoc = FillItemDoc(item); 

         ItemDetail itemDetail; 
         if(ItemDetail.TryGet(db, item.Id, out itemDetail)) { 
          ItemDetailDoc itemDetailDoc = FillItemDetailDoc(itemDetail); 
          itemDoc.Details = new ItemDetailDoc[1]; 


          Event eEvent = null; 
          if(Event.GetEvent(db, itemDetail, currentStatus, out eEvent)) { 
           EventDoc eventDoc = FillEventDoc(eEvent); 
           itemDetailDoc.Events = new EventDoc[1]; 

           if(eEvent.LocationId.HasValue) { 
            Location location = null; 
            if(Location.TryGet(db, eEvent.LocationId.Value, out location)) { 
             eventDoc.Location = new LocationDoc(); 
             eventDoc.Location = FillLocationDoc(location, db); 
            } 
           } 
           itemDetailDoc.Events[0] = eventDoc; 
          } 
          itemDoc.Details[0] = itemDetailDoc; 
         } 
         itemDocs.Add(itemDoc); 
        } 
        assignmentDoc.Items = itemDocs.ToArray(); 
        doc.Assignment = assignmentDoc; 
       } 

      }, delegate(Exception e) { 
       result.Message = e.Message; 
      }); 

      reLocationDoc = doc; 
      return result; 

     } finally { 
      LOGGER.Trace("Exit GetRelocationAssignment()."); 
     } 
    } 

在所有这些代码中返回数据是好的。只有在传递给webmetod时才会丢失数据。

在此处输入代码。

Answer 1

此外，消息中的XML标记的顺序，使差异 - 两年前，我有大约或许有类似的问题，在这种情况下，参数值分别为传输过程中dissappearing因为发送部分下令标签不同于模式中定义了什么。

Answer 2

确保在任何一端都使用相同的套管来访问XML标签。如果外壳不一样，那么该值将不被读取。

Answer 3

您应该检查所有消息是从您的web服务发送回来的。手动调用您的webservice并检查其响应。

• 如果所有数据都存在，可能是您的webservice引用已过时;通过右键单击您的web服务参考并选择“更新”来更新它
• 如果您的数据没有回来，您的问题可能与web服务代码有关。 您应该再次检查序列化代码（如果有），并确保所有返回的类型为 [Serializable] 。您应该检查所有返回类型是否为public，因为它是序列化的必需条件。

正如John Saunders所述，[Serializable]不被XmlSerializer使用。