public void setLabel()
        {
            GradesRepository gr = new GradesRepository();

            lblMaghta.InnerText = gr.getGradeTitleByID(gid);
            FieldsRepository fr = new FieldsRepository();

            lblReshte.InnerText = fr.getFieldTitleByID(fid);

            StudentRepository sr = new StudentRepository();

            lblStudentsCount.InnerText = sr.countStudentsByFieldID_GradeID(fid, gid).ToString();

            vReportExamsRepository rep = new vReportExamsRepository();

            lblmianginkatbi.InnerText   = rep.getAverageOfFieldOfgrade(fid, gid, 0).ToString();
            lblmianginshafahi.InnerText = rep.getAverageOfFieldOfgrade(fid, gid, 1).ToString();
        }