Conditional JSON serialization using C# -

i have class serialize json in c# , post restful web service. have requirment if 1 field filled out field not present. service errors if both fields serialized json object. class looks this:

    [datacontract(name = "test-object")] public class testobject {     [datamember(name = "name")]     public string name { get; set; }      // if string-value not null or whitespace not serialize bool-value     [datamember(name = "bool-value")]     public bool boolvalue { get; set; }      // if string-value null or whitespace not serialize     [datamember(name = "string-value")]     public string stringvalue { get; set; } } 

as noted in comments, if stringvalue has value don't put boolvalue in json object. if stringvalue blank, don't put in stringvalue instead put in boolvalue.

i found how xml serialization, cannot find way works json serialization. there conditional json serialization on c#?

it appears using datacontractjsonserializer. in case, can:

1. disable direct serialization of properties attribute [ignoredatamember].
2. create proxy string , bool? properties serialization return null when should not serialized. these can private.
3. set [datamember(emitdefaultvalue=false)] on these proxy properties suppress output of nulls.

thus:

[datacontract(name = "test-object")] public class testobject {     [datamember(name = "name")]     public string name { get; set; }      [ignoredatamember]     public bool boolvalue { get; set; }      [ignoredatamember]     public string stringvalue { get; set; }      bool shouldserializestringvalue()     {         return !string.isnullorwhitespace(stringvalue);     }      // if string-value not null or whitespace not serialize bool-value     [datamember(name = "bool-value", emitdefaultvalue=false)]     bool? serializedboolvalue {                 {             if (!shouldserializestringvalue())                 return boolvalue;             return null;         }         set         {             boolvalue = (value ?? false); // or don't set @ if value null - choice.         }     }      // if string-value null or whitespace not serialize     [datamember(name = "string-value", emitdefaultvalue=false)]     string serializedstringvalue {                 {             if (shouldserializestringvalue())                 return stringvalue;             return null;         }         set         {             stringvalue = value;         }     } } 

incidentally, work json.net, respects data contract attributes.