/// <summary>
/// Handles the event when the link button for "Update Grade" is clicked.
/// Parses the input and updates the grade for the given registration.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void lnkUpdate_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e)
{
string formatClearedValue = Numeric.ClearFormatting(gradeTextBox.Text, "%");
if (Numeric.isNumeric(formatClearedValue, System.Globalization.NumberStyles.Float))
{
double gradeParsed = double.Parse(formatClearedValue);
gradeParsed = gradeParsed / 100;
if (gradeParsed >= 0 && gradeParsed <= 1)
{
Registration idToBeUpdated = constructorData.registration;
int registrationID = idToBeUpdated.RegistrationId;
string notes = idToBeUpdated.Notes;
ServiceReference.CollegeRegistrationClient localWS = new ServiceReference.CollegeRegistrationClient();
localWS.updateGrade(gradeParsed, registrationID, notes);
frmStudent frmStudent = new frmStudent(constructorData);
frmStudent.MdiParent = this.MdiParent;
frmStudent.Show();
this.Close();
}
else
{
MessageBox.Show("Grade value is out of range, please enter a value between 0 to 1.");
}
}
else
{
MessageBox.Show("Please enter grade in decimal format between 0 and 1. Update failed.");
}
}
/// <summary>
/// Performs the appropriate operation of CollegeRegistration dependent on what type of transaction it is.
/// </summary>
/// <param name="transactionRecords"></param>
private void processTransactions(IEnumerable <XElement> transactionRecords)
{
//Loop through each transaction and grab each child element value
foreach (XElement node in transactionRecords)
{
string typeValue = node.Element("type").Value;
string studentNumberValue = node.Element("student_no").Value;
string courseNumberValue = node.Element("course_no").Value;
string registrationNumberValue = node.Element("registration_no").Value;
string gradeValue = node.Element("grade").Value;
string notes = node.Element("notes").Value;
//Parse numerical values
long studentNumberParsed = long.Parse(studentNumberValue);
//If the type is 1 (registration), then register the course for the student
if (typeValue.Equals("1") && registrationNumberValue.Equals("*") && gradeValue.Equals("*"))
{
int?courseID = (from results
in db.Courses
where results.CourseNumber == courseNumberValue
select results.CourseId).SingleOrDefault();
int?studentID = (from results
in db.Students
where results.StudentNumber == studentNumberParsed
select results.StudentId).SingleOrDefault();
if (studentID != null && courseID != null)
{
int course = (int)courseID;
int student = (int)studentID;
ServiceReference.CollegeRegistrationClient localWS = new ServiceReference.CollegeRegistrationClient();
int returnCode = localWS.registerCourse(student, course, notes);
db.SaveChanges();
//Successful registration
if (returnCode == 0)
{
logData += "Successful registration for student number: " + studentNumberValue + ". Course selected: " + courseNumberValue + "\r\n";
}
//Failed Registrations
else if (returnCode == -100 || returnCode == -200 || returnCode == -300)
{
logData += registerError(returnCode);
}
//Unknown error when registering
else
{
logData += registerError(returnCode);
}
}
}
//If the type is 2 (grading), then update the grade
else if (typeValue.Equals("2") && !registrationNumberValue.Equals("*") && !gradeValue.Equals("*"))
{
double gradeParsed = (double.Parse(gradeValue)) / 100;
long registrationParsed = long.Parse(registrationNumberValue);
int?registrationID = (from results
in db.Registrations
where results.RegistrationNumber == registrationParsed
select results.RegistrationId).SingleOrDefault();
//If the grade is within range
if (gradeParsed >= 0 && gradeParsed <= 1 && registrationID != null)
{
int registration = (int)registrationID;
ServiceReference.CollegeRegistrationClient localWS = new ServiceReference.CollegeRegistrationClient();
try
{
localWS.updateGrade(gradeParsed, registration, notes);
db.SaveChanges();
logData += "Grade " + gradeValue + " applied to student " + studentNumberValue + " for registration " + registrationNumberValue + "\r\n";
}
catch (Exception)
{
logData += "Problem with transaction: update for " + registrationNumberValue + " was unsuccessful\r\n";
}
}
}
}
}
