问题将数据发布到我的WCF服务

Question

我正在尝试设置一个简单的服务，允许用户在POST主体中将Pickup对象作为XML传入。如果我将服务设置为接收Stream类型，我可以让它工作正常，但我不知道我需要更改为了它而不是自定义类型是可行的。当我告诉服务器期望提货类型时，我收到“请求错误。服务器遇到......”

我有人可以告诉我在服务器/客户端需要更改以使其工作我会非常感激。

我的数据合同

[DataContract]
public class Pickup
{        
    [DataMember]
    public string DelZip
    { get; set; }

}

运营合同

  [OperationContract]
    [WebInvoke(Method = "POST",
        UriTemplate = "/pickups",
        RequestFormat = WebMessageFormat.Xml,
        ResponseFormat = WebMessageFormat.Xml,
        BodyStyle = WebMessageBodyStyle.Bare)]
    string RequestPickup(Pickup pickup);


    public string RequestPickup(Pickup pu)
    {
        return pu.DelZip;
    }

配置

      <services>
  <service name="TestAPI.Services.TestServices" >
    <endpoint address=""
              binding="webHttpBinding" behaviorConfiguration="webHttp"
              contract="TestAPI.Services.ITestServices" />
  </service>
</services>    
<behaviors>
  <endpointBehaviors>
    <behavior name="webHttp">
      <webHttp/>
    </behavior>
  </endpointBehaviors>      
</behaviors>

我的客户代码

 const string url = "http://localhost:18463/TestServices.svc/pickups";
                req = (HttpWebRequest)WebRequest.Create(url);
                req.Method = "POST";
                req.ContentType = "application/xml";                

                var xmlDoc = new XmlDocument { XmlResolver = null };
                xmlDoc.LoadXml(@"<Pickup><DelZip>55555</DelZip></Pickup>");
                string sXml = xmlDoc.InnerXml;
                req.ContentLength = sXml.Length;
                var sw = new StreamWriter(req.GetRequestStream());
                sw.Write(sXml);
                sw.Close();

                res = (HttpWebResponse)req.GetResponse();
                Stream responseStream = res.GetResponseStream();
                var streamReader = new StreamReader(responseStream);