private void setGridBlacklistSource()
        {
            Business.university.CooperationRequest.CooperationRequestBusiness cr = new Business.university.CooperationRequest.CooperationRequestBusiness();
            DataTable dt = cr.getBlacklistTeachers();

            grdBlacklist.DataSource = dt;
            grdBlacklist.DataBind();
        }
        private void searchIddMeli()
        {
            btnBlacklist.Visible     = false;
            btnExitBlacklist.Visible = false;
            Business.university.CooperationRequest.CooperationRequestBusiness cr = new Business.university.CooperationRequest.CooperationRequestBusiness();
            DataTable dt = cr.getBlacklistTeachers();

            btnBlacklist.Visible = true;
            if (dt.Rows.Count > 0)
            {
                DataRow[] dr = dt.Select("idd_meli='" + txtIddMeli.Text.Trim() + "'");
                if (dr.Length > 0)
                {
                    var status = Convert.ToBoolean(dr[0]["inBlacklist"]);
                    btnExitBlacklist.Visible = status == true;
                    btnBlacklist.Visible     = status == false;
                }
            }
        }