// to find course
public String findCourse(Course course)
{
Course c;
try
{
c = (Course)this.courses[course.getCourseId()];
} catch (NullReferenceException e) {
c = null;
}
if (c != null)
{
return c.getCourseId();
}
else {
return "";
}
}
private void btnCreateCourse_Click(object sender, EventArgs e)
{
String errors = "";
if (txtCourseId.Text.Equals(""))
{
errors += "\n-Course ID required.";
}
if (txtCourseName.Text.Equals(""))
{
errors += "\n-Course Name required.";
}
if (txtCourseSequence.Text.Equals("")) {
errors += "\n-Course Sequence required.";
}
//check if course already exist or not
foreach (String course in courses.Keys) {
if (course == txtCourseId.Text) {
errors += "\n-Course Id alerady exist";
}
}
if (errors == "")
{
//create a course
Course newCourse = new Course(txtCourseId.Text, txtCourseName.Text, txtCourseSequence.Text);
courses.Add(newCourse.getCourseId(), newCourse);
String message = "Course added";
MessageBox.Show(message);
}
else
{
MessageBox.Show(errors);
}
}
// add course into department
public void AddCourse(Course course)
{
courses.Add(course.getCourseId(), course);
}