protected void BindData()
    {
        long ID = long.Parse(Request.QueryString["ID"]);

        // select the medical service from database
        var ctx            = new DataClassesDataContext();
        var medicalService = from m in ctx.MedicalServices
                             join g in ctx.MedicalServiceGroups
                             on m.MedicalServiceGroupID equals g.ID
                             where m.ID == ID
                             select new
        {
            ID    = m.ID,
            Name  = m.Name,
            Price = m.Price,
            Group = g.Name
        };

        MedicalServiceDetailsFormView.DataSource = medicalService;
        MedicalServiceDetailsFormView.DataBind();
    }