Using .net Mvc 2 And WCF - Passing Generic Object To The Service Call?
Mar 11, 2011[DataContract]
public class UserCertification
{
...
}
[DataContract]
public class UserPhone
{
...
}
[code]...
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public string MyWebMethod(string foo, string bar)
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// DataContractJsonSerializer to deserialize foo and bar to
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return "{"Message":"Everything is a-ok!"}";
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I'll call it from the client via:
var myParams = { "foo":{"name":"Bob Smith", "age":50},"bar":{"color":"blue","size":"large","quantity":2} };
$.ajax({
type: 'POST',
url: 'https://mydomain.com/WebServices/TestSvc.asmx/MyWebMethod',
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contentType: 'application/json; charset=utf-8',
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success: function (response, status) {
alert('Yay!');
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However, this yields the following error (a breakpoint on the first line in MyWebMethod() is never hit):
{"Message":"No parameterless
constructor defined for type of
u0027System.Stringu0027.","StackTrace":"
at
System.Web.Script.Serialization.ObjectConverter.ConvertDictionaryToObject(IDictionary2
dictionary, Type type,
JavaScriptSerializer serializer,
Boolean throwOnError, Object&
convertedObject)
at
System.Web.Script.Serialization.ObjectConverter.ConvertObjectToTypeInternal(Object
o, Type type, JavaScriptSerializer
serializer, Boolean throwOnError,
Object& convertedObject)
at
System.Web.Script.Serialization.ObjectConverter.ConvertObjectToTypeMain(Object
o, Type type, JavaScriptSerializer
serializer, Boolean throwOnError,
Object& convertedObject)
at
System.Web.Script.Services.WebServiceMethodData.StrongTypeParameters(IDictionary2
rawParams)
at
System.Web.Script.Services.RestHandler.InvokeMethod(HttpContext
context, WebServiceMethodData
methodData, IDictionary`2
rawParams)
at
System.Web.Script.Services.RestHandler.ExecuteWebServiceCall(HttpContext
context, WebServiceMethodData
methodData)","ExceptionType":"System.MissingMethodException"}
I'd like to pass in two string parameters and use DataContractJsonSerializer to write new Foo and Bar objects. Am I missing something?
