将JSON数组发布到WCF Rest服务结果为空参数。 DataContract?

时间:2013-10-12 06:55:16

标签: c# json wcf

我正在尝试在dotnet(VS 2012)中创建一个接受JSON列表的restful web服务。有这个非常有用的帖子。

Jquery Ajax Posting json to webservice

示例是现货,但我需要对DataContract进行排序。这是我的问题:

Fiddler帖子:

 { "Markers": [
 { "position": "128.3657142857143", "markerPosition": "7" },
 { "position": "235.1944023323615", "markerPosition": "19" },
 { "position": "42.5978231292517", "markerPosition": "-3" }
 ]};

在VS2012调试器中,我看到了等效的内容:

 { "Markers": [
 { "position": "0", "markerPosition": "0" },
 { "position": "0", "markerPosition": "0" },
 { "position": "0", "markerPosition": "0" }
 ]};

以下是代码(直接来自链接示例):

public class Marker
{
   decimal position { get; set; }
   int markerPosition { get; set; }
}

public string CreateMarkers(List<Marker> Markers)
{
   return "Received " + Markers.Count + " markers.";
}

这是合同:

[OperationContract]
[WebInvoke(UriTemplate = "Markers", Method = "POST", ResponseFormat =    WebMessageFormat.Json,
RequestFormat = WebMessageFormat.Json, BodyStyle = WebMessageBodyStyle.WrappedRequest)]
string CreateMarkers(List<Marker> Markers);

另一篇同样精彩的帖子解释说,需要设置datacontract以查看参数值:

WCF REST POST of JSON: Parameter is empty

我最初的问题是数据合同应该是什么。我开始时:

[OperationContract]
[WebInvoke(UriTemplate = "Markers", Method = "POST", ResponseFormat =           WebMessageFormat.Json,
RequestFormat = WebMessageFormat.Json, BodyStyle = WebMessageBodyStyle.WrappedRequest)]
string CreateMarkers(List<Marker> Markers);

之后消息结构通过,但是null内容。然后,根据建议,我试过了:

[OperationContract]
[WebInvoke(UriTemplate = "Markers", Method = "POST", ResponseFormat =           WebMessageFormat.Json,
RequestFormat = WebMessageFormat.Json, BodyStyle = WebMessageBodyStyle.Bare)]
string CreateMarkers(List<Marker> Markers);

之后,消息结构和内容为空。

 [OperationContract]
    [WebInvoke(UriTemplate = "WrappedMarkers", Method = "POST", ResponseFormat = WebMessageFormat.Json,
        RequestFormat = WebMessageFormat.Json, BodyStyle = WebMessageBodyStyle.WrappedRequest)]
    string WrappedMarkers(MarkerRequest wrappedmarkers);

 [DataContract]
  public class MarkerRequest
  {
    [DataMember]
    public List<Marker> Markers 
    { 
        get { return _markers; }
        set { _markers = value; } 
    }

   private List<Marker> _markers = new List<Marker>(); 
}


 public string WrappedMarkers(MarkerRequest wrappedmarkers)
    {
        return wrappedmarkers.Markers.ToString();
    }

以下是已签约的操作,已更改为WrappedRequest

结构正确,但内容再次为空。

回到原点。我似乎能够看到消息的结构。如何将内容映射到结构?

1 个答案:

答案 0 :(得分:8)

据我所知,由于您没有在数据类上设置 [DataContract] [DataMember] 属性,因此您获得'0'值。添加这些attr之后,您的类应该看起来像

[DataContract]
public class Marker
{
   [DataMember]
   decimal position { get; set; }
   [DataMember]
   int markerPosition { get; set; }
}