C＃HttpClient不發送POST變量

Question

我試圖做一個應用程序，將發送一個POST請求https://owlexpress.kennesaw.edu/prodban/bwckschd.p_get_crse_unsec與一些信息並返回一個類列表。

你可以去這裏通過搜索「我正在使用2015年秋季，數學，課程1190」。 https://owlexpress.kennesaw.edu/prodban/bwckschd.p_disp_dyn_sched

當我運行下面的代碼時，它輸出它返回到一個字符串，它將進入一個webbrowser組件。它顯示：

Class Schedule Search  
Fall Semester 2015 
Mar 31, 2015 
Stop You must select at least ONE subject . 

我使用Chrome的調試找到POST值，並將其設置爲它們是什麼，當我使用該網站正常。我甚至包含了一些cookie，以防需要它們。

編輯：

好的，新的問題。我用了一個可行的瀏覽器，並得到了這一點：「term_in = 201508 & sel_subj =假& sel_day =假& sel_schd =假& sel_insm =假& SEL_C放=假& sel_levl =假& sel_sess =假& sel_instr =假& sel_ptrm =虛設& 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 &是gin_ap =一個& end_hh = 0 & end_mi = 0 & end_ap =一個」

我不能發送，但因爲是使用了一些名字兩次，像sel_subj（那些是我的字典中的鍵值）

代碼：

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 for 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; 
     } 

    } 

} 

} 

Answer 1

根據我們在評論的討論，你正在發佈到服務需要一組與「虛擬」的價值觀和其它參數一套ame具有真正的價值。

如果您將NameValueCollection用於進入FormUrlEncodedContent構造函數的參數，您將能夠使用重複鍵。它應該然後工作