/*
* EventName: bttnEnroll_Click
* Parameters: sender,event
* Summary: this event gets called when the enroll button is clicked and enrolls the student into the requested course.
* Pre-req: Only if the Zid entered is a valid one and also the course asked to
* enroll is an existing course, and if student is not already enrolled in it.
*/
private void bttnEnroll_Click(object sender, EventArgs e)
{
//clearing the message ad list boxes before displaying the result
rtbOutput.Clear();
lstCourse.Items.Clear();
lstStudent.Items.Clear();
Form1_Load(sender, e);
Course cobj = new Course();
Student sobj = new Student();
int stcount = -1, ccount = -1;
int index = 0;
Program p = new Program();
string id = txtSearchZid.Text; //storing the input zid
string coursenum = txtCourse.Text; //storing the input course
if (id.Length != 0)
{
if (coursenum.Length != 0)
{
string c = id.Substring(0, 1); //id the zid is entered without omitting the 'Z' character.
if (c == "z" || c == "Z")
{
id = id.Substring(1, id.Length - 1);
}
for (int k = 0; k < p.NewStudents.Count; k++)
{
if (p.NewStudents[k].Zid == Convert.ToInt32(id))
{
stcount = k;
break;
}
else
{
continue;
}
}
if (stcount >= 0 && stcount < p.NewStudents.Count)
{
string[] details = coursenum.Split(' ');
string[] cour_sec = details[1].Split('-');
for (int k = 0; k < p.NewCourses.Count; k++)
{
if (p.NewCourses[k].Cnum == Convert.ToUInt32(cour_sec[0]))
{
ccount = k;
}
else
{
continue;
}
}
if (ccount >= 0 && ccount < p.NewCourses.Count)
{
for (int i = 0; i < p.NewCourses.Count; i++)
{
if (p.NewCourses[i].Cnum == Convert.ToUInt32(cour_sec[0]))
{
cobj = p.NewCourses[i];
index = i;
break;
}
}
if (!p.NewCourses[ccount].Stuenrolled.Contains(Convert.ToInt32(id)))
{
p.NewCourses[ccount].Stuenrolled.Add(Convert.ToInt32(id));
if (p.NewStudents[stcount].Crhours <= 18)
{
p.NewStudents[stcount].Crhours += cobj.Chours;
}
else
{
rtbOutput.AppendText("Student credit hours exceeds allowed limit of 18. Hence, could not enroll.");
}
if (p.NewCourses[ccount].Stuenrolledcount < p.NewCourses[ccount].Maxenrollment)
{
p.NewCourses[ccount].Stuenrolledcount++;
}
else
{
rtbOutput.AppendText("This class has reached its maximum capacity. Hence, could not enroll. Sorry!");
}
rtbOutput.AppendText("z" + id + " has been successfully enrolled into " + coursenum.ToUpper() + "\n\n");
lstCourse.Items.Clear();
for (int i = 0; i < p.NewCourses.Count; i++)
{
lstCourse.Items.Add(p.NewCourses[i].Deptcode + " " + p.NewCourses[i].Cnum + "-" + p.NewCourses[i].Section + " (" + p.NewCourses[i].Stuenrolledcount + "/" + p.NewCourses[i].Maxenrollment + ")");
}
}
else
{
rtbOutput.AppendText("Student already enrolled into this course");
}
}
else
{
rtbOutput.AppendText("Unfortunately, there is no such course. Please enter a valid course. \n\n\n");
}
}
else
{
rtbOutput.AppendText("Unfortunately, there is no such student to proceed to enrolling\n\n\n");
}
}
else
{
rtbOutput.AppendText("Please enter a Course number-Section number");
}
}
else
{
rtbOutput.AppendText("Please enter a Z-id <omitting Z character>");
}
}
/*
* EventName: btnDrop_Click
* Parameters: sender,event
* Summary: This event gets called when drop student button gets clicked and intends to drop a student from a particular course.
* Pre-req: Only if the Zid entered is a valid one and also the course asked to
* has that student enrolled in it. The student has ever enrolled in that course.
*/
private void btnDrop_Click(object sender, EventArgs e)
{
rtbOutput.Clear();
lstCourse.Items.Clear();
lstStudent.Items.Clear();
Form1_Load(sender, e);
int stcount = -1, ccount = -1;
Course cobj = new Course();
Student sobj = new Student();
Program p = new Program();
string id = txtSearchZid.Text;
string coursenum = txtCourse.Text;
if (id.Length != 0)
{
if (coursenum.Length != 0 && coursenum.Length > 3)
{
string c = id.Substring(0, 1);
if (c == "z" || c == "Z") //if the zid is entered without omitting the Z character.
{
id = id.Substring(1, id.Length - 1);
}
for (int k = 0; k < p.NewStudents.Count; k++)
{
if (p.NewStudents[k].Zid == Convert.ToInt32(id))
{
stcount = k;
}
else
{
continue;
}
}
if (stcount >= 0 && stcount < p.NewStudents.Count)
{
string[] details = coursenum.Split(' ');
string[] cour_sec = details[1].Split('-');
for (int k = 0; k < p.NewCourses.Count; k++)
{
if (p.NewCourses[k].Cnum == Convert.ToUInt32(cour_sec[0]))
{
ccount = k;
break;
}
else
{
continue;
}
}
if (ccount >= 0 && ccount < p.NewCourses.Count)
{
for (int i = 0; i < p.NewCourses.Count; i++)
{
if (p.NewCourses[i].Cnum == Convert.ToUInt32(cour_sec[0]))
{
cobj = p.NewCourses[i];
break;
}
}
if (p.NewCourses[ccount].Stuenrolled.Contains(Convert.ToInt32(id)))
{
p.NewCourses[ccount].Stuenrolled.Remove(Convert.ToInt32(id));
if (p.NewStudents[stcount].Crhours >= 0 && p.NewStudents[stcount].Crhours <= 18)
{
p.NewStudents[stcount].Crhours -= p.NewCourses[ccount].Chours;
}
if (p.NewCourses[ccount].Stuenrolledcount < p.NewCourses[ccount].Maxenrollment)
{
p.NewCourses[ccount].Stuenrolledcount--;
}
rtbOutput.AppendText("z" + id + " has been successfully dropped from " + coursenum.ToUpper() + "\n\n");
lstCourse.Items.Clear();
for (int i = 0; i < p.NewCourses.Count; i++)
{
lstCourse.Items.Add(p.NewCourses[i].Deptcode + " " + p.NewCourses[i].Cnum + "-" + p.NewCourses[i].Section + " (" + p.NewCourses[i].Stuenrolledcount + "/" + p.NewCourses[i].Maxenrollment + ")");
}
}
else
{
rtbOutput.AppendText("Student had never been enrolled in this course");
}
}
else
{
rtbOutput.AppendText("Unfortunately, there is no such course to drop \n\n");
}
}
else
{
rtbOutput.AppendText("Unfortunately, there is no such student to proceed to dropping a course\n\n");
}
}
else
{
rtbOutput.AppendText("Please enter a valid <Deptcode Course number-Section number>");
}
}
else
{
rtbOutput.AppendText("Please enter a Z-id <omitting Z character>");
}
}