c# - Binding a comma separated list to a List<int> in asp.net web api -

the default binder in web api expecst

http://url.com/webapi/report/?pageids=3243&pageids=2365

to bind

public ihttpactionresult report(list<int> pageids){ // exciting webapi code} 

i wish bind http://url.com/webapi/report/?pageids=3243,2365

as running out of space in url get.

i have created class public class commaseparatedmodelbinder :

system.web.http.modelbinding.imodelbinder     {         public bool bindmodel(httpactioncontext actioncontext, modelbindingcontext bindingcontext)         {            //binding in here         }      } 

and registered in webapiconfig.cs

 var provider = new simplemodelbinderprovider(            typeof(list<int>), new commaseparatedmodelbinder());             config.services.insert(typeof(modelbinderprovider), 0, provider); 

i have altered method signature use model binder so

 public ihttpactionresult report( [modelbinder] list<int> pageids){ // exciting webapi code} 

however break point in binder not being hit (and list not bound).

what else need configure?

make sure follow all of steps in article: parameter binding in asp.net web api

it appears missing last step:

with model-binding provider, still need add [modelbinder] attribute parameter, tell web api should use model binder , not media-type formatter. don’t need specify type of model binder in attribute:

   public httpresponsemessage get([modelbinder] geopoint location) { ... } 

also, i've never tried binding list<int>. may not able model bind because build-in type. if so, box custom class type , make sure add [modelbinder] attribute class.

or....

a better solution: kiss

public ihttpactionresult report(string pageids) {      var ids = pageids.split(',');      // exciting web api code and/or more robust checking of split }