//This function run when user clicks Reset Quiz marks button
//It deletes all the quiz marks entered and reset counters for recalculation
private void resetQuizMarksButton_Click(object sender, EventArgs e)
{
EnterQuizMarkTextBox.Text = String.Empty;
listOfQuizMarksTextBox.Text = String.Empty;
numberOfQuizzes = 0;
quizTotal = 0;
maxQuizMark = 0;
minQuizMark = 0;
quizMark = 0;
percentageTextBox.Text = String.Empty;
gradeTextBox.Text = String.Empty;
highLowQuizCheckbox.Visible = false;
EnterQuizMarkTextBox.Select();
}
//By clicking TransferMark button, we are send the user input to "getValue" function for cleansing,
//If the value is good then it is stored as quizMark in list of marks in Multiline text box
//We have also intialized a minimum and maximum mark variable which will compare new inputs and store max and min
//values for later process.
//We are also calculation the number of Quiz marks entered for calculating quiz average.
private void transferMarksButton_Click(object sender, EventArgs e)
{
if (!getValue(EnterQuizMarkTextBox.Text, out quizMark))
{
EnterQuizMarkTextBox.Select();
return;
}
numberOfQuizzes += 1;
if (numberOfQuizzes == 1)
{
maxQuizMark = quizMark;
minQuizMark = quizMark;
}
else
{
if (quizMark > maxQuizMark)
{
maxQuizMark = quizMark;
}
if (quizMark < minQuizMark)
{
minQuizMark = quizMark;
}
}
listOfQuizMarksTextBox.AppendText(EnterQuizMarkTextBox.Text + Environment.NewLine);
quizTotal = quizTotal + quizMark;
EnterQuizMarkTextBox.Select();
EnterQuizMarkTextBox.Text = String.Empty;
quizTotalNew = quizTotal;
numberOfQuizzesNew = numberOfQuizzes;
if (numberOfQuizzes > 4)
{
highLowQuizCheckbox.Visible = true;
}
return;
}
//This function get activated when we click "Calculate Grade" button, it send the Midterm and Final Exam marks
//to "getValue" function for cleansing. When a good values is recieved, it is used to calculate Final mark and
//final grade. The weightage of marks is as follows: 20% from Quiz average mark, 30% from Midterm mark and 50%
//from Final Exam mark.
//Final grade is decided using if-else ladder based on table provided by the user.
private void calculateGradeButton_Click(object sender, EventArgs e)
{
//This is to ensure, user input atleast one quiz mark to calculate final grades
if (numberOfQuizzes < 1)
{
MessageBox.Show($"***Error - Minimum one Quiz Mark required");
EnterQuizMarkTextBox.Select();
return;
}
//Sending midterm mark for validation
if (!getValue(midtermMarksTextBox.Text, out midTermMark))
{
midtermMarksTextBox.Select();
return;
}
//Sending final exam mark for validation
if (!getValue(finalExamMarksTextBox.Text, out finalExamMark))
{
finalExamMarksTextBox.Select();
return;
}
//Calculating average quiz mark and final mark and grade obtained
averagequizMarks = quizTotalNew / numberOfQuizzesNew;
finalGradeMark = (Math.Round((averagequizMarks * 0.2) + (midTermMark * 0.3) + (finalExamMark * 0.5)));
percentageTextBox.Text = finalGradeMark.ToString();
if (finalGradeMark >= 95)
{
finalGrade = "A+";
}
else if (finalGradeMark >= 90)
{
finalGrade = "A";
}
else if (finalGradeMark >= 85)
{
finalGrade = "A-";
}
else if (finalGradeMark >= 80)
{
finalGrade = "B+";
}
else if (finalGradeMark >= 75)
{
finalGrade = "B";
}
else if (finalGradeMark >= 70)
{
finalGrade = "B-";
}
else if (finalGradeMark >= 67)
{
finalGrade = "C+";
}
else if (finalGradeMark >= 64)
{
finalGrade = "C";
}
else if (finalGradeMark >= 60)
{
finalGrade = "C-";
}
else if (finalGradeMark >= 55)
{
finalGrade = "D+";
}
else if (finalGradeMark >= 50)
{
finalGrade = "D";
}
else
{
finalGrade = "F";
}
gradeTextBox.Text = finalGrade;
return;
}
