private void LoadDDLs()
        {
            DBLayer db = new DBLayer();
            uiDropDownListClasses.DataSource = db.GetAllClass();
            uiDropDownListClasses.DataTextField = "ArName";
            uiDropDownListClasses.DataValueField = "ClassID";
            uiDropDownListClasses.DataBind();
            uiDropDownListClasses.SelectedIndex = 0;

            uiDropDownListClassRooms.DataSource = db.GetAllClassRoomsByClassID(Convert.ToInt32(uiDropDownListClasses.SelectedValue));
            uiDropDownListClassRooms.DataTextField = "ArName";
            uiDropDownListClassRooms.DataValueField = "ClassRoomID";
            uiDropDownListClassRooms.DataBind();

            uiDropDownListSection.DataSource = db.GetAllSections();
            uiDropDownListSection.DataTextField = "ARName";
            uiDropDownListSection.DataValueField = "SectionID";
            uiDropDownListSection.DataBind();
            uiDropDownListSection.SelectedIndex = 0;
        }
 private void BindData()
 {
     DBLayer db = new DBLayer();
     DataSet ds = new DataSet();
     ds = db.GetAllSections();
     uiGridViewSections.DataSource = ds;
     uiGridViewSections.DataBind();
 }