private void btnUpdate_Click(object sender, EventArgs e)
        {
            if (string.IsNullOrEmpty(txtSessionCode.Text))
            {
                MessageBox.Show("Please select session first!", "Update Message", MessageBoxButtons.OK, MessageBoxIcon.Error);
                return;
            }

            string Lecturers = "", LecturersList = "";

            foreach (var lecturer in chkListLecturers.CheckedItems)
            {
                if (Lecturers != "" && LecturersList != "")
                {
                    Lecturers     += ",";
                    LecturersList += ",";
                }
                LecturersFormModel lecObj = lecturerList.Where(lec => lec.EmployeeName == lecturer.ToString()).FirstOrDefault();
                Lecturers     += lecObj.EmployeeId;
                LecturersList += lecObj.EmployeeName;
            }

            SubjectsFormModel subModel = subList.Where(sub => sub.SubjectName == comboSubjects.SelectedItem.ToString().Trim()).FirstOrDefault();

            ActionResult updateResult = formCtrl._updateFormData(new SessionsSubFormModel()
            {
                SessionCode   = Convert.ToInt32(txtSessionCode.Text),
                Lecturers     = Lecturers,
                LecturersList = LecturersList,
                Tags          = comboTags.SelectedItem.ToString(),
                GroupId       = comboGroup.SelectedItem.ToString(),
                SubjectCode   = subModel.SubjectCode,
                SubjectName   = subModel.SubjectName,
                NoOfStudent   = Convert.ToInt32(txtNoOfStudents.Text),
                Duration      = Convert.ToInt32(txtDurations.Text)
            });

            if (updateResult.State)
            {
                SessionsSubFormModel updateObj = updateResult.Data;
                MessageBox.Show("Session " + updateObj.SessionCode + " Sucessfully Updated!", "Update Message", MessageBoxButtons.OK, MessageBoxIcon.Information);
                initForm();
            }
            else
            {
                MessageBox.Show(updateResult.Data, "Update Message", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
        }
        private void btnDelete_Click(object sender, EventArgs e)
        {
            if (string.IsNullOrEmpty(txtSessionCode.Text))
            {
                MessageBox.Show("Please select session first!", "Delete Message", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }

            ActionResult deleteResult = formCtrl._deleteFormData(new SessionsSubFormModel()
            {
                SessionCode = Convert.ToInt32(txtSessionCode.Text.Trim())
            });

            if (deleteResult.State)
            {
                SessionsSubFormModel deleteObj = deleteResult.Data;
                MessageBox.Show("Session " + deleteObj.SessionCode + " Sucessfully Deleted!", "Delete Message", MessageBoxButtons.OK, MessageBoxIcon.Information);
                initForm();
            }
            else
            {
                MessageBox.Show(deleteResult.Data, "Delete Message", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
        }
        private void btnInsert_Click(object sender, EventArgs e)
        {
            if (chkListLecturers.CheckedItems.Count == 0)
            {
                MessageBox.Show("Please Select The Lecturers!", "Validation Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
            else if (comboTags.SelectedIndex == 0)
            {
                MessageBox.Show("Please Select Tag!", "Validation Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
                comboTags.Focus();
            }
            else if (comboGroup.SelectedIndex == 0)
            {
                MessageBox.Show("Please Select Group Or Subgroup!", "Validation Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
                comboGroup.Focus();
            }
            else if (comboSubjects.SelectedIndex == 0)
            {
                MessageBox.Show("Please Select Subject!", "Validation Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
                comboSubjects.Focus();
            }
            else if (string.IsNullOrEmpty(txtNoOfStudents.Text))
            {
                MessageBox.Show("Please Enter No Of Students!", "Validation Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
                txtNoOfStudents.Focus();
            }
            else if (string.IsNullOrEmpty(txtDurations.Text))
            {
                MessageBox.Show("Please Enter Duration!", "Validation Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
                txtDurations.Focus();
            }
            else
            {
                string Lecturers = "", LecturersList = "";
                foreach (var lecturer in chkListLecturers.CheckedItems)
                {
                    if (Lecturers != "" && LecturersList != "")
                    {
                        Lecturers     += ",";
                        LecturersList += ",";
                    }
                    LecturersFormModel lecObj = lecturerList.Where(lec => lec.EmployeeName == lecturer.ToString()).FirstOrDefault();
                    Lecturers     += lecObj.EmployeeId;
                    LecturersList += lecObj.EmployeeName;
                }

                SubjectsFormModel subModel = subList.Where(sub => sub.SubjectName == comboSubjects.SelectedItem.ToString().Trim()).FirstOrDefault();

                ActionResult saveResult = formCtrl._saveFormData(new SessionsSubFormModel()
                {
                    Lecturers     = Lecturers,
                    LecturersList = LecturersList,
                    Tags          = comboTags.SelectedItem.ToString(),
                    GroupId       = comboGroup.SelectedItem.ToString(),
                    SubjectCode   = subModel.SubjectCode,
                    SubjectName   = subModel.SubjectName,
                    NoOfStudent   = Convert.ToInt32(txtNoOfStudents.Text),
                    Duration      = Convert.ToInt32(txtDurations.Text)
                });

                if (saveResult.State)
                {
                    SessionsSubFormModel saveObj = saveResult.Data;
                    MessageBox.Show("Session " + saveObj.SessionCode + " Sucessfully Saved!", "Save Message", MessageBoxButtons.OK, MessageBoxIcon.Information);
                    initForm();
                }
                else
                {
                    MessageBox.Show(saveResult.Data, "Save Message", MessageBoxButtons.OK, MessageBoxIcon.Error);
                }
            }
        }