将 JSON 发送到 WCF Rest 服务 - 对象始终为 null
我正在尝试使用 REST、WCF 和 JSON(对所有这些技术来说都是新的)来让我的应用程序正常工作。我的“GET”工作正常。正是“POST”给我带来了问题。
正如您将在下面看到的,我使用 JSON.stringify“打包”我的 JSON,然后触发对 REST 资源的 POST。但是,当对象到达正在处理请求的 WCF 方法时,该对象始终为 null。
这是代码:
$.ajax({
type: "POST",
dataType: "json",
url: "Services/ContactCompanyService.svc/contactcompanies/customers",
contentType: "application/json; charset=utf-8",
data: JSON.stringify({ contactcompany: newCustomer }),
success: function (html) { alert(html); }
});
这是配置内容:
<services>
<service behaviorConfiguration="ServiceBehaviour" name="ContactCompanyService">
<endpoint address="contactcompanies" behaviorConfiguration="web" binding="webHttpBinding" contract="IContactCompanyService"/>
</service>
</services>
<behaviors>
<endpointBehaviors>
<behavior name="web">
<webHttp/>
<enableWebScript/>
</behavior>
</endpointBehaviors>
<serviceBehaviors>
<behavior name="ServiceBehaviour">
<serviceMetadata httpGetEnabled="true"/>
<serviceDebug includeExceptionDetailInFaults="false"/>
</behavior>
<behavior name="">
<serviceMetadata httpGetEnabled="true"/>
<serviceDebug includeExceptionDetailInFaults="false"/>
</behavior>
</serviceBehaviors>
</behaviors>
<serviceHostingEnvironment multipleSiteBindingsEnabled="true" aspNetCompatibilityEnabled="true"/>
这是契约:
[OperationContract]
[WebInvoke(Method = "POST", RequestFormat = WebMessageFormat.Json, ResponseFormat = WebMessageFormat.Json, BodyStyle = WebMessageBodyStyle.Wrapped, UriTemplate = "customers")]
[return: MessageParameter(Name = "ContactCompany")]
ContactCompany AddContactCompany(ContactCompany ContactCompanyObject);
它是实现上述接口的方法,其中 ContactCompanyObject 为 null。
我到底做错了什么?请不要排除我的愚蠢行为。
更远: 我将 WebMessageBodyStyle 更改为 .Bare,这导致对象不为 null ...但对象的每个属性都为 null。也就是说,包裹是我想要走的路。
如果有任何帮助,我将不胜感激。如果您需要更多信息,请告诉我。
更新
我从头开始了一个全新的项目 - 剥离。
我得到了完全相同的结果 - 当 WCF 代码接收到该对象时,该对象为 null。
这是我在这个新测试项目中所做的事情。
WCF 合约:(
在命名空间下:NullTestService
[ServiceContract]
public interface IService1
{
[OperationContract]
[WebInvoke(Method = "GET", RequestFormat = WebMessageFormat.Json, ResponseFormat = WebMessageFormat.Json, BodyStyle = WebMessageBodyStyle.Wrapped, UriTemplate = "NullTestPost")]
[return: MessageParameter(Name = "NullTestType")]
NullTestType GettMethod();
[OperationContract]
[WebInvoke(Method = "POST", RequestFormat = WebMessageFormat.Json, ResponseFormat = WebMessageFormat.Json, BodyStyle = WebMessageBodyStyle.Wrapped, UriTemplate = "NullTestPost")]
[return: MessageParameter(Name = "NullTestType")]
NullTestType PostMethod(NullTestType NullTestTypeObject);
}
[DataContract]
public class NullTestType
{
[DataMember]
public string NullTestString { get; set; }
[DataMember]
public int NullTestInt { get; set; }
}
服务实现: (相同的命名空间)
public class Service1 : IService1
{
public NullTestType PostMethod(NullTestType NullTestTypeObject)
{
return NullTestTypeObject;
}
public NullTestType GettMethod()
{
return new NullTestType { NullTestString = "Returned String", NullTestInt = 25 };
}
}
网站项目。 Service.svc:
<%@ ServiceHost Service="NullTestService.Service1" %>
Web项目中的web.config:
<system.serviceModel>
<services>
<service behaviorConfiguration="ServiceBehaviour" name="NullTestService.Service1">
<endpoint address="nulltestaddress" behaviorConfiguration="web" binding="webHttpBinding" contract="NullTestService.IService1"/>
</service>
</services>
<behaviors>
<endpointBehaviors>
<behavior name="web">
<webHttp/>
</behavior>
</endpointBehaviors>
<serviceBehaviors>
<behavior name="ServiceBehaviour">
<serviceMetadata httpGetEnabled="false" />
<serviceDebug includeExceptionDetailInFaults="false"/>
</behavior>
</serviceBehaviors>
</behaviors>
</system.serviceModel>
最后是Web项目中的jQuery:
$(function () {
// $.ajax({
// type: "GET",
// url: "http://localhost:8080/TestWeb/Service.svc/nulltestaddress/nulltestpost",
// success: alertResult
// });
alert('about to do it');
$.ajax({
type: "POST",
url: "http://localhost:8080/TestWeb/Service.svc/nulltestaddress/nulltestpost",
dataType: "json",
contentType: "application/json; charset=utf-8",
data: '{"NullTestType":{"NullTestString":"This is a post string","NullTestInt":25}}',
success: alertResult
});
});
function alertResult(data) {
alert(data.NullTestType.NullTestString);
}
所以。 (注释掉的)GET 工作正常并返回 JSON。 POST 没有。在线:(
public NullTestType PostMethod(NullTestType NullTestTypeObject)
{
return NullTestTypeObject;
}
“返回”行)NullTestTypeObject 始终为 NULL。
我将非常感谢您的帮助。我为此浪费了很多时间。
I am trying to get my application working by using REST, WCF and JSON (new to all those technologies). I have the 'GET' working fine. It is the 'POST' that is causing me problems.
As you will see below I 'pack up' my JSON using JSON.stringify, then fire off the POST to the REST resource. However, when the object gets to the WCF method that is handling the request the object is always null.
Here is the code:
$.ajax({
type: "POST",
dataType: "json",
url: "Services/ContactCompanyService.svc/contactcompanies/customers",
contentType: "application/json; charset=utf-8",
data: JSON.stringify({ contactcompany: newCustomer }),
success: function (html) { alert(html); }
});
Here is the config stuff:
<services>
<service behaviorConfiguration="ServiceBehaviour" name="ContactCompanyService">
<endpoint address="contactcompanies" behaviorConfiguration="web" binding="webHttpBinding" contract="IContactCompanyService"/>
</service>
</services>
<behaviors>
<endpointBehaviors>
<behavior name="web">
<webHttp/>
<enableWebScript/>
</behavior>
</endpointBehaviors>
<serviceBehaviors>
<behavior name="ServiceBehaviour">
<serviceMetadata httpGetEnabled="true"/>
<serviceDebug includeExceptionDetailInFaults="false"/>
</behavior>
<behavior name="">
<serviceMetadata httpGetEnabled="true"/>
<serviceDebug includeExceptionDetailInFaults="false"/>
</behavior>
</serviceBehaviors>
</behaviors>
<serviceHostingEnvironment multipleSiteBindingsEnabled="true" aspNetCompatibilityEnabled="true"/>
Here is the contract:
[OperationContract]
[WebInvoke(Method = "POST", RequestFormat = WebMessageFormat.Json, ResponseFormat = WebMessageFormat.Json, BodyStyle = WebMessageBodyStyle.Wrapped, UriTemplate = "customers")]
[return: MessageParameter(Name = "ContactCompany")]
ContactCompany AddContactCompany(ContactCompany ContactCompanyObject);
And it is the method that implements the above interface where ContactCompanyObject is null.
What on earth am I doing wrong? Please don't rule out stupidity on my part.
Further:
I changed the WebMessageBodyStyle to .Bare, and this resulted in the object not being null ... but EVERY property of the object being null. That said, wrapped is the way I would like to go.
I would be grateful of any assistance. Let me know if you need further information.
UPDATE
I started from scratch with a completely new project - stripped back.
I am getting exactly the same result - the object, when received by the WCF code, is null.
Here's what I did on this new test project.
WCF Contract:
(under the namespace: NullTestService
[ServiceContract]
public interface IService1
{
[OperationContract]
[WebInvoke(Method = "GET", RequestFormat = WebMessageFormat.Json, ResponseFormat = WebMessageFormat.Json, BodyStyle = WebMessageBodyStyle.Wrapped, UriTemplate = "NullTestPost")]
[return: MessageParameter(Name = "NullTestType")]
NullTestType GettMethod();
[OperationContract]
[WebInvoke(Method = "POST", RequestFormat = WebMessageFormat.Json, ResponseFormat = WebMessageFormat.Json, BodyStyle = WebMessageBodyStyle.Wrapped, UriTemplate = "NullTestPost")]
[return: MessageParameter(Name = "NullTestType")]
NullTestType PostMethod(NullTestType NullTestTypeObject);
}
[DataContract]
public class NullTestType
{
[DataMember]
public string NullTestString { get; set; }
[DataMember]
public int NullTestInt { get; set; }
}
Service Implementation:
(same namespace)
public class Service1 : IService1
{
public NullTestType PostMethod(NullTestType NullTestTypeObject)
{
return NullTestTypeObject;
}
public NullTestType GettMethod()
{
return new NullTestType { NullTestString = "Returned String", NullTestInt = 25 };
}
}
Website project.
Service.svc:
<%@ ServiceHost Service="NullTestService.Service1" %>
web.config in the web project:
<system.serviceModel>
<services>
<service behaviorConfiguration="ServiceBehaviour" name="NullTestService.Service1">
<endpoint address="nulltestaddress" behaviorConfiguration="web" binding="webHttpBinding" contract="NullTestService.IService1"/>
</service>
</services>
<behaviors>
<endpointBehaviors>
<behavior name="web">
<webHttp/>
</behavior>
</endpointBehaviors>
<serviceBehaviors>
<behavior name="ServiceBehaviour">
<serviceMetadata httpGetEnabled="false" />
<serviceDebug includeExceptionDetailInFaults="false"/>
</behavior>
</serviceBehaviors>
</behaviors>
</system.serviceModel>
and finally the jQuery in the web project:
$(function () {
// $.ajax({
// type: "GET",
// url: "http://localhost:8080/TestWeb/Service.svc/nulltestaddress/nulltestpost",
// success: alertResult
// });
alert('about to do it');
$.ajax({
type: "POST",
url: "http://localhost:8080/TestWeb/Service.svc/nulltestaddress/nulltestpost",
dataType: "json",
contentType: "application/json; charset=utf-8",
data: '{"NullTestType":{"NullTestString":"This is a post string","NullTestInt":25}}',
success: alertResult
});
});
function alertResult(data) {
alert(data.NullTestType.NullTestString);
}
So. The (commented out) GET works fine and returns the JSON. The POST does not. On the line:
public NullTestType PostMethod(NullTestType NullTestTypeObject)
{
return NullTestTypeObject;
}
(the 'return' line) the NullTestTypeObject is always NULL.
I would be very grateful for help. I have lost a lot of time over this.
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如果 Wrapped 是您想要做的,那么您需要将请求包装在操作参数名称中:
或者对于第二个示例,如果将 ajax 调用更改为如下所示,您应该会得到预期的结果:
If Wrapped is what you want to do, then you need to wrap the request in the operation parameter name:
Or for the second example, if you change the ajax call to the one shown below, you should get the expected result: