C# HttpClient not sending POST variables -


i'm trying make app send post request https://owlexpress.kennesaw.edu/prodban/bwckschd.p_get_crse_unsec info , return class list.

you can go here go through search "i'm using fall 2015, math, course 1190". https://owlexpress.kennesaw.edu/prodban/bwckschd.p_disp_dyn_sched

when run code below, outputs returns string goes webbrowser component. shows:

class schedule search     fall semester 2015 mar 31, 2015 stop must select @ least 1 subject .

i used chrome debugging find post values , set them when use site normally. included cookies in case needed those.

edit:

ok, new issue. used browser works , got this: "term_in=201508&sel_subj=dummy&sel_day=dummy&sel_schd=dummy&sel_insm=dummy&sel_c‌​amp=dummy&sel_levl=dummy&sel_sess=dummy&sel_instr=dummy&sel_ptrm=dummy&sel_attr=d‌​ummy&sel_subj=math&sel_crse=1190&sel_title=&sel_insm=%25&sel_from_cred=&sel_to_cr‌​ed=&sel_camp=%25&sel_levl=%25&sel_ptrm=%25&sel_instr=%25&begin_hh=0&begin_mi=0&be‌​gin_ap=a&end_hh=0&end_mi=0&end_ap=a"

i can't send though because uses names twice, sel_subj (and key values in dictionary)

code:

using system; using system.collections.generic; using system.linq; using system.text; using system.threading.tasks; using system.windows; using system.windows.controls; using system.windows.data; using system.windows.documents; using system.windows.input; using system.windows.media; using system.windows.media.imaging; using system.windows.navigation; using system.windows.shapes; using system.net.http; using system.net;  namespace classchecker { /// <summary> /// interaction logic mainwindow.xaml /// </summary> public partial class mainwindow : window {     methods methods1 = new methods();      public mainwindow()     {         initializecomponent();      }      private void button_click(object sender, routedeventargs e)     {                     string temp = methods1.getdata2();         console.readline();         webbrowser.navigatetostring(temp);                 } }   public class methods {      public string getdata2()     {         var cookiecontainer = new cookiecontainer();         using (var handler = new httpclienthandler() { cookiecontainer = cookiecontainer })         using (var client = new httpclient(handler))         {             client.baseaddress = new uri("https://owlexpress.kennesaw.edu");               var values = new dictionary<string, string>             {                { "sel_subj", "math" },                { "term_in", "201508" },                { "sel_day", "dummy"},                { "sel_schd", "dummy"},                { "sel_insm", "%"},                { "sel_camp", "%"},                { "sel_levl", "%"},                { "sel_sess", "dummy"},                { "sel_instr", "%"},                { "sel_ptrm", "%"},                { "sel_attr", "dummy"},                                   { "sel_crse", "1190" },                { "sel_title", "" },                { "sel_from_cred", "" },                { "sel_to_cred", "" },                { "begin_hh", "0" },                { "begin_mi", "0" },                { "begin_ap", "a" },                { "end_hh", "0" },                { "end_mi", "0" },                { "end_ap", "a" }              };             var content = new formurlencodedcontent(values);              cookiecontainer.add(client.baseaddress, new cookie("sessid", "mfliu0vsmtgxnjyx"));             cookiecontainer.add(client.baseaddress, new cookie("bigipserverowlexpress-all", "2239289986.0.0000"));              client.defaultrequestheaders.accept.add(new system.net.http.headers.mediatypewithqualityheadervalue("text/html"));             var result = client.postasync("/prodban/bwckschd.p_get_crse_unsec", content).result;             string resultcontent = result.content.readasstringasync().result;                             messagebox.show(result.headers.tostring());             return resultcontent;         }      }  }  }

per our discussion in comments, service posting requires set of parameters 'dummy' values , set of same params real values.

if use namevaluecollection argument going formurlencodedcontent constructor, able use duplicate keys. should work


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