protected void Page_Load(object sender, EventArgs e)
{
List <PaymentDTO> lstDto = new List <PaymentDTO>();
PaymentBusiness PB = new PaymentBusiness();
lstDto = PB.Get_Student_Payment(Session[sessionNames.userID_StudentOstad].ToString());
grd_PaymentList.DataSource = lstDto;
grd_PaymentList.DataBind();
}