我在WCF服务中作为参数使用复杂
JSON作为参数.
在Visual Studio 2008 SP1中使用Microsoft.Net 3.5 SP1
通过以下合同：
[ServiceContract]
public interface IService1
{
[OperationContract]
[WebGet(UriTemplate="GetDataUsingDataContract?composite={composite}",BodyStyle=WebMessageBodyStyle.Wrapped,RequestFormat=Webmessageformat.Json,ResponseFormat = Webmessageformat.Json)]
CompositeType GetDataUsingDataContract(CompositeType composite);
// Todo: Add your service operations here
}
// Use a data contract as illustrated in the sample below to add composite types to service operations
[DataContract]
public class CompositeType
{
string boolValue = "true";
string stringValue = "Hello ";
[DataMember]
public string BoolValue
{
get { return boolValue; }
set { boolValue = value; }
}
[DataMember]
public string StringValue
{
get { return stringValue; }
set { stringValue = value; }
}
}
使用以下URL：
http://localhost:1122/Service1.svc/GetDataUsingDataContract?composite={"BoolValue":"True","StringValue":"Hello"}
使用Enpoint配置：
<system.serviceModel>
<services>
<service name="WebHTTPBindingExample.Service1" behaviorConfiguration="WebHTTPBindingExample.Service1Behavior">
<host>
<baseAddresses>
<add baseAddress="http://localhost:8731/Design_Time_Addresses/WebHTTPBindingExample/Service1/"/>
</baseAddresses>
</host>
<!-- Service Endpoints -->
<!-- Unless fully qualified,address is relative to base address supplied above -->
<!--<endpoint address="" binding="wsHttpBinding" contract="WebHTTPBindingExample.IService1">
--><!--
Upon deployment,the following identity element should be removed or replaced to reflect the
identity under which the deployed service runs. If removed,WCF will infer an appropriate identity
automatically.
--><!--
<identity>
<dns value="localhost"/>
</identity>
</endpoint>-->
<endpoint address="Web" behaviorConfiguration="ChatAspNetAjaxBehavior" binding="webHttpBinding" name="ajaxEndpoint" contract="WebHTTPBindingExample.IService1"/>
<!-- Metadata Endpoints -->
<!-- The Metadata Exchange endpoint is used by the service to describe itself to clients. -->
<!-- This endpoint does not use a secure binding and should be secured or removed before deployment -->
<endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange"/>
</service>
</services>
<behaviors>
<serviceBehaviors>
<behavior name="WebHTTPBindingExample.Service1Behavior">
<!-- To avoid disclosing Metadata information,set the value below to false and remove the Metadata endpoint above before deployment -->
<serviceMetadata httpGetEnabled="True"/>
<!-- To receive exception details in faults for debugging purposes,set the value below to true. Set to false before deployment
to avoid disclosing exception information -->
<serviceDebug includeExceptionDetailInFaults="False"/>
</behavior>
</serviceBehaviors>
<endpointBehaviors>
<behavior name="ChatAspNetAjaxBehavior">
<webHttp/>
</behavior>
</endpointBehaviors>
</behaviors>
</system.serviceModel>
我得到以下错误：
Operation 'GetDataUsingDataContract' in contract 'IService1' has a query variable named 'composite' of type 'WebHTTPBindingExample.CompositeType',but type 'WebHTTPBindingExample.CompositeType' is not convertible by 'QueryStringConverter'. Variables for UriTemplate query values must have types that can be converted by 'QueryStringConverter'.
解决方法
我不相信你可以使用这种WCF在查询字符串上传递复杂的类型.请参阅ASP.NET论坛中的Microsoft技术的
this response – 它与您的情况相似.
根据你如何扼杀你的服务方法,看起来像一个更合适的动词是POST或PUT,你可以把你的CompositeType有效载荷放在请求体内.但我猜你的意图.
我可以通过将查询字符串类型从CompositeType更改为String,然后使用ASP.NET JavaScriptSerializer类将JSON字符串反序列化为CompositeType,从而使您的代码工作并仍然使用GET. (你可以在这里使用你最喜欢的JSON助手类 – 我偏偏到JSON.NET,但是我也听到FlexJson也是非常好的)
我没有触摸你的web.config(除了让它在我的本地测试应用程序中工作).我唯一的改变是在服务方法签名和服务方法的实现.
[ServiceContract]
public interface IService1
{
[OperationContract]
[WebGet(UriTemplate = "GetDataUsingDataContract?composite={composite}",BodyStyle = WebMessageBodyStyle.Wrapped,RequestFormat = Webmessageformat.Json,ResponseFormat = Webmessageformat.Json)]
CompositeType GetDataUsingDataContract(String composite);
// Todo: Add your service operations here
}
public class Service1 : IService1
{
public CompositeType GetDataUsingDataContract(String composite)
{
//use the JavaScriptSerializer to convert the string to a CompositeType instance
JavaScriptSerializer jscript = new JavaScriptSerializer();
CompositeType newComp = jscript.Deserialize<CompositeType>(composite);
newComp.StringValue += " NEW!";
return newComp;
}
}
我希望这有帮助.如果您有其他问题,请告诉我们.