public validity isValidAdd(course crsBngAdded)
{
bool validAdd = true;
bool warning = false;
string warningMessage = "";
double nextSmstCrd = 0.00;
List <classTime> timeBlocksAdding = crsBngAdded.getClassTime();
// Totals current semester credit & checks if course is already taken this semester
foreach (course crs in registeredCrs)
{
nextSmstCrd += Convert.ToDouble(crs.credit);
if (crsBngAdded.crsID.Trim().Substring(0, crsBngAdded.crsID.Trim().Length - 3) == crs.crsID.Trim().Substring(0, crs.crsID.Trim().Length - 3))
{
validAdd = false;
warningMessage = "You have already enrolled in this course this semester";
}
List <classTime> timeBlocksCurrent = crs.getClassTime();
foreach (classTime eachCurrentBlock in timeBlocksCurrent)
{
foreach (classTime eachAddingBlock in timeBlocksAdding)
{
if (eachCurrentBlock.getDays().Intersect(eachAddingBlock.getDays()).Count() != 0)
{
double startA = eachCurrentBlock.getStartTime();
double startB = eachAddingBlock.getStartTime();
double endA = eachCurrentBlock.getEndTime();
double endB = eachAddingBlock.getEndTime();
if (!(startA == endB || startB == endA))
{
if (startA >= startB)
{
if (startA <= endB)
{
warning = true;
if (validAdd)
{
warningMessage = "There is a time overlap";
}
}
}
if (startB >= startA)
{
if (startB <= endA)
{
warning = true;
if (validAdd)
{
warningMessage = "There is a time overlap";
}
}
}
}
}
}
}
}
// Checks if total credit for next semester is above 5.00
if (nextSmstCrd + Convert.ToDouble(crsBngAdded.credit.Trim()) >= 5.00)
{
validAdd = false;
warningMessage = "You can not enroll in more than 5.00 credits worth of courses";
}
// Checks if course has been taken previously
if (validAdd)
{
bool found = false;
foreach (previousCourse prvCrs in pastCrs)
{
if (prvCrs.crsID.Trim().Substring(0, prvCrs.crsID.Trim().Length - 3) == crsBngAdded.crsID.Trim().Substring(0, crsBngAdded.crsID.Trim().Length - 3))
{
warning = true;
found = true;
if (validAdd)
{
warningMessage = "You have already taken this course previously";
}
}
}
if (!found)
{
foreach (previousCourse pcrs in currentCrs)
{
if (pcrs.crsID.Trim().Substring(0, pcrs.crsID.Trim().Length - 3) == crsBngAdded.crsID.Trim().Substring(0, crsBngAdded.crsID.Trim().Length - 3))
{
warning = true;
if (validAdd)
{
warningMessage = "You are taking this course this semester.";
}
}
}
}
}
//check number of seats avaialble
if (crsBngAdded.seats == 0)
{
validAdd = false;
warningMessage = "There are no seats available for the class";
}
validity returningVal = new validity(validAdd, warning, warningMessage);
return(returningVal);
}
// Event handlers
private void addCrsClick(object sender, EventArgs e)
{
int count = addCrsLst.Count;
if (count == 0)
{
MessageBox.Show("Select classes",
"No class selected",
MessageBoxButtons.OK,
MessageBoxIcon.Error);
}
else
{
foreach (string crsID in addCrsLst)
{
Dictionary <string, float> gradeDict = new Dictionary <string, float>()
{
{ "A", 4.0f },
{ "A-", 3.7f },
{ "B+", 3.3f },
{ "B", 3.0f },
{ "B-", 2.7f },
{ "C+", 2.3f },
{ "C", 2.0f },
{ "C-", 1.7f },
{ "D+", 1.3f },
{ "D", 1.0f },
{ "D-", 0.7f }
};
course crs = crsDB.getCourse(crsID);
bool preReq = true;
List <string> preReqLst = crs.preReqLst;
foreach (string courseID in preReqLst)
{
bool temp = false;
foreach (previousCourse pcrs in std.pastCrs)
{
if (courseID == pcrs.crsID.Substring(0, courseID.Length) && gradeDict.ContainsKey(pcrs.grade))
{
temp = true;
break;
}
}
if (!temp)
{
foreach (previousCourse pcrs in std.currentCrs)
{
if (courseID == pcrs.crsID.Substring(0, courseID.Length))
{
temp = true;
break;
}
}
if (!temp)
{
preReq = false;
break;
}
}
}
if (!preReq)
{
MessageBox.Show("You're missing prerequisites.", "Requirement", MessageBoxButtons.OK,
MessageBoxIcon.Error);
return;
}
validity v = std.isValidAdd(crs);
if (v.valid)
{
if (v.warning)
{
MessageBox.Show(crsID + "\n" + v.message, "Warning",
MessageBoxButtons.OK, MessageBoxIcon.Warning);
}
// Add the course to the student
usrDB.addCrsToStd(crsID, "S15", ref crsDB, std);
// Update the course list and student schedule
foreach (DataGridViewRow row in crsLst.Rows)
{
if (row.Cells["Course ID"].Value.ToString().ToString() == crsID)
{
if (row.Visible)
{
crs = crsDB.getCourse(crsID);
row.Cells["Seats"].Value = crs.seats + " / " + crs.maxSeats;
DataTable table = (DataTable)stdSch.DataSource;
table.Rows.Add(crs.crsID, crs.title, crs.instructor, crs.credit, crs.getBlocks());
break;
}
}
}
}
else
{
MessageBox.Show(crsID + "\n" + v.message + "\n" + "The course was not added.", "Invalid add",
MessageBoxButtons.OK, MessageBoxIcon.Error);
continue;
}
}
crsLst.AutoSizeColumnsMode = DataGridViewAutoSizeColumnsMode.None;
crsLst.AutoSizeColumnsMode = DataGridViewAutoSizeColumnsMode.AllCells;
crsLst.DefaultCellStyle.WrapMode = DataGridViewTriState.True;
int width = crsLst.Columns["Schedule"].GetPreferredWidth(DataGridViewAutoSizeColumnMode.AllCells, true);
crsLst.Columns["Schedule"].AutoSizeMode = DataGridViewAutoSizeColumnMode.None;
crsLst.AutoSizeRowsMode = DataGridViewAutoSizeRowsMode.DisplayedCells;
crsLst.Columns["Schedule"].Width = width;
crsLst.ClearSelection();
for (int i = 0; i < crsLst.Rows.Count; i++)
{
crsLst.Rows[i].Cells["Add"].Value = null;
}
addCrsLst.Clear();
MessageBox.Show("The process completed.",
"Done",
MessageBoxButtons.OK,
MessageBoxIcon.Information);
}
}