private void UpdateCourse(ListViewItem item)
{
var course = item.Tag as Course;
var newName = Microsoft.VisualBasic.Interaction.InputBox("New course name", "Course Info", course.Name);
course.Name = newName;
CourseManager.Update(course);
item.SubItems[1].Text = course.Name;
}
private void btnDeleteCourse_Click(object sender, EventArgs e)
{
if (lstCourses.SelectedItems.Count == 0)
{
return;
}
var selectedItem = lstCourses.SelectedItems[0];
CourseManager.Delete((selectedItem.Tag as Course).Id);
lstCourses.Items.Remove(selectedItem);
}
private void btnCreateCourse_Click(object sender, EventArgs e)
{
var newCourse = CourseManager.Create();
var newItem = new ListViewItem {
Text = newCourse.Id.ToString(), Tag = newCourse
};
newItem.SubItems.AddRange(new string[] { newCourse.Name, "0", "0", "0", "0", "0" });
lstCourses.Items.Add(newItem);
UpdateCourse(newItem);
}
private void UpdateGradeItem(ListViewItem item)
{
var grade = item.Tag as CourseGrade;
item.Text = grade.CourseId.ToString();
item.SubItems[1].Text = CourseManager.Get(grade.CourseId).Name;
item.SubItems[2].Text = grade.First.ToString();
item.SubItems[3].Text = grade.Second.ToString();
item.SubItems[4].Text = grade.Third.ToString();
item.SubItems[5].Text = grade.Final.ToString();
item.SubItems[6].Text = grade.Total.ToString();
UpdateInfo();
}
private void btnexportCourses_Click(object sender, EventArgs e)
{
string fileName = "Courses.txt";
string seperator = "===========================================================================================";
var courses = CourseManager.GetAll();
using (var writer = new StreamWriter(fileName, false))
{
for (int i = 0; i < courses.Length; i++)
{
if (i > 1)
{
writer.WriteLine(seperator);
}
writer.WriteLine(courses[i].GetInfoText());
}
}
MessageBox.Show($"Exported all courses info to file {fileName}", "Exported Courses Info", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
private void ReloadCourses()
{
lstCourses.Items.Clear();
foreach (var course in CourseManager.GetAll())
{
var stat = CourseManager.GetStatistics(course.Id);
var courseItem = new ListViewItem {
Text = course.Id.ToString(), Tag = course
};
courseItem.SubItems.Add(course.Name);
courseItem.SubItems.Add(stat.NumberOfEnrolledStudents.ToString());
courseItem.SubItems.Add(stat.NumberOfPassedStudents.ToString());
courseItem.SubItems.Add(stat.NumberOfFailedStudents.ToString());
courseItem.SubItems.Add(stat.LowestGrade.ToString());
courseItem.SubItems.Add(stat.HighestGrade.ToString());
lstCourses.Items.Add(courseItem);
}
}
