private bool CheckRegistrationStatus()
{
InsertLog("Checking registration status...", Color.Black);
WebManager registrationPage = new WebManager("https://banweb.cityu.edu.hk/pls/PROD/bwskfreg.P_AltPin", WebManager.POST);
try
{
registrationPage.AddParameter("term_in", AddDropTerm).Load();
InsertLog(registrationPage.ToString());
HtmlAgilityPack.HtmlNode infoText = registrationPage.GetHtmlNode("//span[@class='infotext']");
if (infoText != null && infoText.InnerText.Contains("You may register during the following times"))
{
return(false);
}
else if (infoText != null && infoText.InnerText.Contains("WEB REGISTRATION PERIOD"))
{
return(true);
}
throw new WebException("Server busy or Unknown error");
}
catch (Exception ex)
{
Debug.WriteLine(ex);
if (ex is WebException)
{
InsertLog("Server returned error: " + ex.Message, Color.Red);
if (ex.Message == "Break in attempt" || ex.Message == "Session timeout")
{
if (PrepareLogin() && Login())
{
return(CheckRegistrationStatus());
}
}
}
else
{
InsertLog(ex.ToString(), Color.Red);
}
}
return(false);
}
private bool Login()
{
InsertLog("Logging in...", Color.Black);
WebManager loginPage = new WebManager("https://banweb.cityu.edu.hk/pls/PROD/twgkpswd_cityu.P_WWWLogin", WebManager.POST);
try
{
loginPage.AddParameter("p_username", Eid)
.AddParameter("p_password", Password)
.AddParameter("p_sess_id", SessionID)
.AddParameter("p_ip", IPAddress)
.AddParameter("to_url", "")
.Load();
InsertLog(loginPage.ToString());
// Check login status
if (loginPage.GetHtmlNode("//meta[@http-equiv='refresh']") != null)
{
InsertLog("Logged in as " + Eid, Color.Blue);
return(true);
}
else
{
InsertLog("Cannot verify your electronic ID and password.", Color.Red);
return(false);
}
}
catch (Exception ex)
{
Debug.WriteLine(ex);
if (ex is WebException)
{
InsertLog("Server returned error: " + ex.Message, Color.Red);
}
else
{
InsertLog(ex.ToString(), Color.Red);
}
}
return(false);
}
private bool SendRegistrationRequests(List <Course> requestList)
{
if (requestList.Count == 0)
{
return(true);
}
InsertLog("Sending your registration request (priority: " + requestList[0].Priority + ")...", Color.Black);
WebManager registrationPage = new WebManager("https://banweb.cityu.edu.hk/pls/PROD/bwckcoms.P_Regs", WebManager.POST);
try
{
registrationPage.AddParameter("term_in", AddDropTerm)
.AddParameter("RSTS_IN", "DUMMY")
.AddParameter("assoc_term_in", "DUMMY")
.AddParameter("CRN_IN", "DUMMY")
.AddParameter("start_date_in", "DUMMY")
.AddParameter("end_date_in", "DUMMY")
.AddParameter("SUBJ", "DUMMY")
.AddParameter("CRSE", "DUMMY")
.AddParameter("SEC", "DUMMY")
.AddParameter("LEVL", "DUMMY")
.AddParameter("CRED", "DUMMY")
.AddParameter("GMOD", "DUMMY")
.AddParameter("TITLE", "DUMMY")
.AddParameter("MESG", "DUMMY")
.AddParameter("REG_BTN", "DUMMY")
.AddParameter("MESG", "DUMMY");
// Drop requests
int dropCount = 0;
foreach (Course course in requestList.Where(course => course.Action == Course.ACTION_DROP))
{
course.Status = Course.STATUS_SENT;
registrationPage.AddParameter("RSTS_IN", "DW")
.AddParameter("CRN_IN", course.CRN)
.AddParameter("assoc_term_in", "")
.AddParameter("start_date_in", "")
.AddParameter("end_date_in", "");
dropCount++;
}
// Wait requests
int waitCount = 0;
foreach (Course course in requestList.Where(course => course.Action == Course.ACTION_WAIT))
{
course.Status = Course.STATUS_SENT;
registrationPage.AddParameter("RSTS_IN", "WL")
.AddParameter("CRN_IN", course.CRN)
.AddParameter("assoc_term_in", "")
.AddParameter("start_date_in", "")
.AddParameter("end_date_in", "");
waitCount++;
}
// Add requests
int addCount = 0;
foreach (Course course in requestList.Where(course => course.Action == Course.ACTION_ADD))
{
course.Status = Course.STATUS_SENT;
registrationPage.AddParameter("RSTS_IN", "RW")
.AddParameter("CRN_IN", course.CRN)
.AddParameter("assoc_term_in", "")
.AddParameter("start_date_in", "")
.AddParameter("end_date_in", "");
addCount++;
}
// Update request list view
this.Invoke((MethodInvoker) delegate
{
// Run on UI thread
SetRequestListView();
});
registrationPage.AddParameter("regs_row", dropCount.ToString())
.AddParameter("wait_row", waitCount.ToString())
.AddParameter("add_row", addCount.ToString())
.AddParameter("REG_BTN", "Submit Changes")
.Load();
InsertLog(registrationPage.ToString());
// Check response content
HtmlAgilityPack.HtmlNode infoText = registrationPage.GetHtmlNode("//span[@class='infotext']");
if (infoText == null || !infoText.InnerText.Contains("WEB REGISTRATION PERIOD"))
{
throw new WebException("Server busy or Unknown error");
}
// Update registered course list
RegisteredCourseList.Clear();
foreach (HtmlAgilityPack.HtmlNode row in registrationPage.GetHtmlNodeCollection("//table[@summary='Current Schedule']//tr"))
{
HtmlAgilityPack.HtmlNodeCollection courseDetails = row.SelectNodes("td");
// Ignore the first row with <th>
if (courseDetails != null)
{
Course course = new Course();
course.CRN = courseDetails[2].InnerText;
course.CourseCode = courseDetails[3].InnerText + courseDetails[4].InnerText;
course.Section = courseDetails[5].InnerText;
course.Title = courseDetails[9].InnerText;
course.Credit = Convert.ToSingle(courseDetails[7].InnerText);
RegisteredCourseList.Add(course);
}
}
// Check registration errors
bool registrationError = false;
HtmlAgilityPack.HtmlNodeCollection errorTable = registrationPage.GetHtmlNodeCollection("//table[@summary='This layout table is used to present Drop or Withdrawal Errors.']//tr");
if (errorTable != null)
{
foreach (HtmlAgilityPack.HtmlNode row in errorTable)
{
HtmlAgilityPack.HtmlNodeCollection errorDetails = row.SelectNodes("td");
// Ignore the first row with <th>
if (errorDetails != null)
{
foreach (Course course in requestList.Where(course => errorDetails[4].InnerText.Contains(course.CRN)))
{
course.Status = "Error: " + errorDetails[4].InnerText;
registrationError = true;
}
}
}
}
errorTable = registrationPage.GetHtmlNodeCollection("//table[@summary='This layout table is used to present Registration Errors.']//tr");
if (errorTable != null)
{
foreach (HtmlAgilityPack.HtmlNode row in errorTable)
{
HtmlAgilityPack.HtmlNodeCollection errorDetails = row.SelectNodes("td");
// Ignore the first row with <th>
if (errorDetails != null)
{
foreach (Course course in requestList.Where(course => course.CRN == errorDetails[1].InnerText || course.CRN == errorDetails[2].InnerText))
{
// Check waitlist
if (errorDetails[0].InnerText.Contains(Course.STATUS_WAITLISTED))
{
course.Action = Course.ACTION_WAIT;
course.Status = Course.STATUS_PENDING;
}
else
{
course.Status = "Error: " + errorDetails[0].InnerText;
registrationError = true;
}
}
}
}
}
// Change the status to completed
foreach (Course course in requestList.Where(course => course.Status == Course.STATUS_SENT))
{
course.Status = Course.STATUS_COMPLETED;
}
// Update list views
this.Invoke((MethodInvoker) delegate
{
// Run on UI thread
SetRegisteredCourseListView();
SetRequestListView();
});
return(!registrationError);
}
catch (Exception ex)
{
Debug.WriteLine(ex);
if (ex is WebException)
{
InsertLog("Server returned error: " + ex.Message, Color.Red);
if (ex.Message == "Break in attempt" || ex.Message == "Session timeout")
{
if (PrepareLogin() && Login())
{
return(SendRegistrationRequests(requestList));
}
}
}
else
{
InsertLog(ex.ToString(), Color.Red);
}
}
return(false);
}