c# - FacebookClient GetTaskAsync sometimes returns invalid JSON string(UWP 10) -


i'm trying data facebook using facebookclient api. error "invalid json string". strange thing data using same task.

this code

    public async void getdata(string accesstoken, string task)     {         facebookclient fbclient = new facebookclient(accesstoken);         try {             var res = await fbclient.gettaskasync(task);//me/feed             string data = res.tostring();             /*idictionary<string, object> o3 = (idictionary<string, object>)await fbclient.gettaskasync(task);             jsonobject o2 = (jsonobject) await fbclient.gettaskasync(task);*/         }         catch (exception e)         {          }     }

var res = ... gives error. don't know why works , time doesn't.

thanks in advance.

the sdk stopped working in windows 10 apps (uwp), continues work fine in windows 8.1 apps.

it's been reported on github page of facebook-csharp-sdk. cause uwp's default newer http/2 protocol causing problems. unfortunately, there no fix yet.

update: there temporary solution if open internet explorer > internet options > advanced > disable http 1.1 , http 1.1 through proxy, sdk continue work in uwp runtime. not real solution problem, brings 1 step closer finding underlying cause.


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