private void btnSubmit_Click(object sender, EventArgs e)
{
//create a TaughtCourse object to be used to store information
TaughtCourse tCourse = new TaughtCourse();
//setting the properties of the object
tCourse.setID(this.txtTaughtID.Text.ToString());
tCourse.CourseID = this.cmbCourseID.SelectedItem.ToString();
tCourse.Semester = this.cmbSemester.SelectedItem.ToString();
//checks if the capacity entered is a number
Boolean isValid = true;
foreach (char c in this.txtYear.Text.ToString())
{
//checks the cahracter is between 0 or 9 and set the boolean to false if not
if (c < '0' || c > '9')
{
isValid = false;
}
}
//if the string contains only numbers then set the proeprty
if (isValid)
{
tCourse.Year = this.txtYear.Text.ToString();
}
else
{
//if invalid input, set the default value 0000 and show a message
tCourse.Year = "0000";
MessageBox.Show("Year entered is invalid.");
}
//call the add method and pass the TaughtCourse object as a parameter
taughtCourses.Add(tCourse);
//checks if the execution was a success or not
if (tCourse.getValid() == true)
{
MessageBox.Show("Taught course have been added successfully.");
//This calls two methods to get the new id and clears old information
clear();
nextID();
}
else
{
//prompt an error message for user indicating error
MessageBox.Show("An error has occured. record was not added.");
}
}
