在WCF服务方法中使用JSON [英] Consuming JSON in WCF service method
问题描述
在较大的项目中，我无法获取WCF服务方法来使用JSON参数。所以我制作了一个较小的测试用例，并且行为得到了回应。如果我调试服务，我可以看到服务调用时参数值为null。 Fiddler确认JSON正在发送，JsonLint确认它是有效的。
In a larger project I am having trouble getting a WCF service method to consume a JSON parameter. So I produced a smaller test case and the behaviour is echoed. If I debug the service I can see the parameter value is null at the service call. Fiddler confirms that the JSON is being sent and JsonLint confirms it is valid.
下面的代码带有调试注释。
Code below with annotations from debugging.
[ServiceContract]
public interface IWCFService
{
[OperationContract]
[WebInvoke(BodyStyle = WebMessageBodyStyle.WrappedRequest,
ResponseFormat = WebMessageFormat.Json,
UriTemplate = "getstring")]
string GetString();
[OperationContract]
[WebInvoke(BodyStyle = WebMessageBodyStyle.WrappedRequest,
ResponseFormat = WebMessageFormat.Json,
UriTemplate = "getplayer")]
//[WebGet(BodyStyle = WebMessageBodyStyle.WrappedRequest,
// ResponseFormat = WebMessageFormat.Json,
// UriTemplate = "getplayers")]
Player GetPlayer();
[OperationContract]
[WebInvoke(BodyStyle = WebMessageBodyStyle.WrappedRequest,
ResponseFormat = WebMessageFormat.Json,
UriTemplate = "getplayers")]
List<Player> GetPlayers();
[OperationContract]
[WebInvoke(
Method = "POST",
BodyStyle = WebMessageBodyStyle.Wrapped,
ResponseFormat = WebMessageFormat.Json,
RequestFormat = WebMessageFormat.Json,
UriTemplate = "totalscore")]
string TotalScore(Player player);
}
...及其实施
public class WCFService : IWCFService
{
public string GetString()
{
return "hello from GetString";
}
public Player GetPlayer()
{
return new Player()
{
Name = "Simon",
Score = 1000,
Club = new Club()
{
Name = "Tigers",
Town = "Glenelg"
}
};
}
public List<Player> GetPlayers()
{
return new List<Player>()
{
new Player()
{
Name = "Simon",
Score = 1000 ,
Club=new Club()
{
Name="Tigers",
Town = "Glenelg"
}
},
new Player()
{
Name = "Fred", Score = 50,
Club=new Club()
{
Name="Blues",
Town="Sturt"
}
}
};
}
public string TotalScore(Player player)
{
return player.Score.ToString();
}
}
调用前三种方法中的任何一种都能正常工作（但是没有参数，你会注意到）。使用此客户端代码调用最后一个方法（TotalScore）...
Calling any of the first three methods works correctly (but no parameters as you'll note). Calling the last method (TotalScore) with this client code ...
function SendPlayerForTotal() {
var json = '{ "player":{"Name":"' + $("#Name").val() + '"'
+ ',"Score":"' + $("#Score").val() + '"'
+ ',"Club":"' + $("#Club").val() + '"}}';
$.ajax(
{
type: "POST",
contentType: "application/json; charset=utf-8",
url: "http://localhost/wcfservice/wcfservice.svc/json/TotalScore",
data: json,
dataType: "json",
success: function (data) { alert(data); },
error: function () { alert("Not Done"); }
});
}
...结果......
... results in ...
There was an error while trying to deserialize parameter http://tempuri.org/:player. The InnerException message was 'Expecting state 'Element'.. Encountered 'Text' with name '', namespace ''. '.
我试过发送一个未包装的JSON版本......
I have tried sending an unwrapped version of the JSON ...
{名称： Simon，Score：100，Club：Rigby}
{"Name":"Simon","Score":"100","Club":"Rigby"}
但是在服务中，参数为null，没有格式化程序异常。
but at the service the parameter is null, and no formatter exceptions.
这是服务web.config的system.serviceModel分支：
This is the system.serviceModel branch of the service web.config:
<system.serviceModel>
<services>
<service name="WCFService.WCFService" behaviorConfiguration="WCFService.DefaultBehavior">
<endpoint address="json" binding="webHttpBinding" contract="WCFService.IWCFService" behaviorConfiguration="jsonBehavior"/>
<endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange"/>
</service>
</services>
<behaviors>
<serviceBehaviors>
<behavior name="WCFService.DefaultBehavior">
<serviceMetadata httpGetEnabled="true"/>
<serviceDebug includeExceptionDetailInFaults="true"/>
</behavior>
</serviceBehaviors>
<endpointBehaviors>
<behavior name="jsonBehavior">
<webHttp/>
</behavior>
</endpointBehaviors>
</behaviors>
这里是播放器DataContract 。
And here is the Player DataContract.
[DataContract(Name = "Player")]
public class Player
{
private string _name;
private int _score;
private Club _club;
[DataMember]
public string Name { get { return _name; } set { _name = value; } }
[DataMember]
public int Score { get { return _score; } set { _score = value; } }
[DataMember]
public Club Club { get { return _club; } set { _club = value; } }
}
任何帮助非常感谢，如果有任何其他信息是需要，请告诉我。
Any help greatly appreciated and if any other info is required, please let me know.
非常感谢。
推荐答案
您以错误的方式编码方法 TotalScore 的输入参数 player 。
You encode the input parameter player of the method TotalScore in the wrong way.
我建议您使用 json2中的 JSON.stringify 函数.js 将任何JavaScript对象转换为JSON。
I recommend you to use JSON.stringify function from json2.js to convert any JavaScript objects to JSON.
var myPlayer = {
Name: "Simon",
Score: 1000,
Club: {
Name: "Tigers",
Town: "Glenelg"
}
};
$.ajax({
type: "POST",
url: "/wcfservice/wcfservice.svc/json/TotalScore",
data: JSON.stringify({player:myPlayer}), // for BodyStyle equal to
// WebMessageBodyStyle.Wrapped or
// WebMessageBodyStyle.WrappedRequest
// data: JSON.stringify(myPlayer), // for no BodyStyle attribute
// or WebMessageBodyStyle.WrappedResponse
contentType: "application/json; charset=utf-8",
dataType: "json",
success: function(data, textStatus, xhr) {
alert(data.TotalScoreResult); // for BodyStyle = WebMessageBodyStyle.Wrapped
// or WebMessageBodyStyle.WrappedResponse
// alert(data); // for BodyStyle = WebMessageBodyStyle.WrappedRequest
// or for no BodyStyle attributes
},
error: function (xhr, textStatus, ex) {
alert("Not Done");
}
});
如果更改 BodyStyle = WebMessageBodyStyle.Wrapped TotalScore 方法的属性为 BodyStyle = WebMessageBodyStyle.WrappedRequest 您可以更改警报（ data.TotalScoreResult）在成功处理警告（数据）。
If you change the BodyStyle = WebMessageBodyStyle.Wrapped attribute of the TotalScore method to BodyStyle = WebMessageBodyStyle.WrappedRequest you can change the alert(data.TotalScoreResult) in the success handle to alert(data).
这篇关于在WCF服务方法中使用JSON的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
