c# - Using object in API response -

i'm building api responds requests. 1 field object , needs repeated data many times query returns.

can give me example of how use object in response c#? class need create?

thanks in advance.

add:

so far have structure like:

public class root { public int model { get; set; } public string lang { get; set; } public part[] parts { get; set; } }  public class part { public int id { get; set; } public string name { get; set; } public type part_types { get; set; } }  public class type { public string url { get; set; } public string desc { get; set; } } 

and response coming

{ "model" : 4 , "lang" : "en_us", "parts" : [ { "id" : 1545, "name" : "part 1", "part_types" : { "url" : "part.com/type1", "desc" : "has 6 bits" } } ] }

but need like

{ "model" : 4 , "lang" : "en_us", "parts" : [ { "id" : 1545, "name" : "part 1", "part_types" : { "type 1" : { "url" : "part.com/type1", "desc" : "has 6 bits" }, "type 2" : { "url" : "part.com/type2", "desc" : "has 7 bits." } } } ] }

the part_type field object , made class called type. need have 1 or many type , specify name of type eg "type 1" have 2 more fields under url , desc. can see above has 2 type, type 1 , type 2.

can me going wrong?

so, if understand correctly, want "part_types" able have many parts? in current code, part_types object can have one.

you need 2 things: 1. data type collection, , 2. serializer writes data type way want. so, example, can use dictionary (system.collections.generic.dictionary).

public dictionary<string,type> part_types { get; set; } 

so, assuming have created objects type1 , type2, write:

mypart.part_types = new dictionary<string,type>(); mypart.part_types.add("type 1", type1); mypart.part_types.add("type 2", type2); 

now happens depends on serializer. typically use json.net, works , free. set objects yours using dictionary, , get:

{   "model": 4,   "lang": "en_us",   "parts": [     {       "id": 1545,       "name": "part 1",       "part_types": {         "type 1": {           "url": "part.com/type1",           "desc": "has 6 bits"         },         "type 2": {           "url": "part.com/type1",           "desc": "has 6 bits"         }       }     }   ] } 

i think that's you're looking for... however, using datacontractjsonserializer (system.runtime.serialization.json.datacontractjsonserializer), this:

{   "lang": "en_us",   "model": 4,   "parts": [     {       "id": 1545,       "name": "part 1",       "part_types": [         { "key" : "type 1", "value": {"desc":"has 6 bits","url":"part.com\/type1"} },         { "key" : "type 2", "value": {"desc":"has 6 bits","url":"part.com\/type1"} }       ]     }   ] } 

i'm not sure how datacontractjsonserializer handles other collections (e.g. lists, keyvaluepairs, etc.) if you're using it, may need experiment.