private void btnCreateLesson_Click(object sender, EventArgs e)
{
string txtLessonTheme = this.txtLessonTheme.Text,
txtNumberOfHours = this.comboBoxNHours.SelectedItem.ToString(),
txtHomeTask = this.txtHomeTask.Text;
if (string.IsNullOrEmpty(txtLessonTheme))
{
ShowExceptionMessage("Lesson theme cannot be empty!");
return;
}
if (string.IsNullOrEmpty(txtNumberOfHours))
{
ShowExceptionMessage("Number of hours cannot be empty!");
return;
}
int numberOfHours = 0;
if (!int.TryParse(txtNumberOfHours, out numberOfHours))
{
ShowExceptionMessage("Incorrect hours number format!");
return;
}
int studentsInGradeCount = StudentDAL.GetStudentCountByGradeName(comboGrade.SelectedItem.ToString());
if (studentsInGradeCount == 0)
{
MessageBox.Show(string.Format("No students in grade {0}!\nAsk administrator to add some!",
comboGrade.SelectedItem.ToString()),
"Impossible to create lesson!", MessageBoxButtons.OK, MessageBoxIcon.Error);
return;
}
try
{
ILessonInfo newLesson = LessonDAL.StartNewLesson(comboBoxSubject.SelectedItem.ToString(),
txtLessonTheme,
numberOfHours,
comboGrade.SelectedItem.ToString(),
txtHomeTask,
this.TeacherID);
NewLessonWindow nlWindow = new NewLessonWindow(this.TeacherID, newLesson);
nlWindow.Owner = this.Owner;
nlWindow.Show();
this.Close();
}
catch (Exception ex)
{
ShowExceptionMessage(ex.Message);
return;
}
}
public NewLessonWindow(int teacherID, ILessonInfo newLesson)
{
InitializeComponent();
this.TeacherID = teacherID;
this.newLesson = newLesson;
}
public NewLessonWindow(int teacherID, ILessonInfo newLesson)
{
InitializeComponent();
this.TeacherID = teacherID;
this.newLesson = newLesson;
}
