private void simpleButton5_Click(object sender, EventArgs e)
{
gridControl1.DataSource = dt.DDHS_SELECT();
txtMaHS.DataBindings.Clear();
txtMaHS.DataBindings.Add("Text", gridControl1.DataSource, "StudentID");
txtHoHS.DataBindings.Clear();
txtHoHS.DataBindings.Add("Text", gridControl1.DataSource, "FirstName");
txtTenHS.DataBindings.Clear();
txtTenHS.DataBindings.Add("Text", gridControl1.DataSource, "LastName");
dateTimePicker1.DataBindings.Clear();
dateTimePicker1.DataBindings.Add("Text", gridControl1.DataSource, "DateTask");
cboTuanDiemDanh.DataBindings.Clear();
cboTuanDiemDanh.DataBindings.Add("Text", gridControl1.DataSource, "WeeklyTaskID");
cboNamHoc.DataBindings.Clear();
cboNamHoc.DataBindings.Add("Text", gridControl1.DataSource, "MonthlyTaskID");
cboDiemDanh.DataBindings.Clear();
cboDiemDanh.DataBindings.Add("Text", gridControl1.DataSource, "Present");
txtLyDo.DataBindings.Clear();
txtLyDo.DataBindings.Add("Text", gridControl1.DataSource, "Reason");
}