}//-------------------------------

        //event is raised when the selected index is changed
        private void ctlManagerOnSemesterSelectedIndexChanged()
        {
            _dateStart = _studentManager.GetSemesterDateStart(_studentManager.GetSemesterSystemId(this.ctlManager.SchoolYearComboBox.SelectedIndex,
                                                                                                  this.ctlManager.SemesterComboBox.SelectedIndex)).ToShortDateString() + " 12:00:00 AM";
            _dateEnd = _studentManager.GetSemesterDateEnd(_studentManager.GetSemesterSystemId(this.ctlManager.SchoolYearComboBox.SelectedIndex,
                                                                                              this.ctlManager.SemesterComboBox.SelectedIndex)).ToShortDateString() + " 11:59:59 PM";

            _frmStudentSearch.DisableEnableButtonStudentList(_userInfo, true);

            this.ShowSearchResultDialog();
        }//-----------------------------