//protected void btnSaveList_Click(object sender, EventArgs e)
        //{
        //    foreach(var item in gvParticipants.Items)
        //    {
        //        var chkAssign = (CheckBox)((Telerik.Web.UI.GridItem)item).FindControl("chkAssign");
        //        var hdnExaminerID = (HiddenField)((Telerik.Web.UI.GridItem)item).FindControl("hdnExaminerID");
        //        var hdnExaminerName = (HiddenField)((Telerik.Web.UI.GridItem)item).FindControl("hdnExaminerName");
        //        var hdnExamPlaceID = (HiddenField)((Telerik.Web.UI.GridItem)item).FindControl("hdnExamPlaceID");
        //        var hdnUserName = (HiddenField)((Telerik.Web.UI.GridItem)item).FindControl("hdnUserName");
        //        var hdnPassword = (HiddenField)((Telerik.Web.UI.GridItem)item).FindControl("hdnPassword");
        //        var hdnEPass = (HiddenField)((Telerik.Web.UI.GridItem)item).FindControl("hdnEPass");
        //        if (chkAssign != null && hdnExaminerID != null && hdnExaminerName != null && hdnExamPlaceID != null && hdnUserName != null && hdnPassword != null)
        //        {
        //            int? examinerPlaceID;
        //            if (string.IsNullOrEmpty(hdnExamPlaceID.Value)) examinerPlaceID = null;
        //            else examinerPlaceID = Convert.ToInt32(hdnExamPlaceID.Value);

        //            var examinerId = Convert.ToInt32(hdnExaminerID.Value);

        //            //if (ExamBusiness.ListExaminerExamPlace(examinerId).Rows.Count == 0)
        //            //    ExamBusiness.Insert_ExaminerInfo(examinerId, Convert.ToInt32(examinerPlaceID), hdnExaminerName.Value,
        //            //        Mobile: string.Empty,
        //            //        Email: string.Empty,
        //            //        StartDate: string.Empty,
        //            //        EndDate: string.Empty,
        //            //        pass: string.Empty,
        //            //        UserId: examinerId);

        //            if (chkAssign.Checked)
        //                ExamBusiness.AddOrUpdateExamClassParticipants(
        //                    examinerId: Convert.ToInt32(hdnExaminerID.Value),
        //                    examinerName: hdnExaminerName.Value,
        //                    examinerPlaceId: examinerPlaceID,
        //                    examinerUserName: hdnUserName.Value,
        //                    password: hdnPassword.Value,
        //                    ePass: hdnEPass.Value);

        //            else if (((List<int>)Session["Participants"]).Contains(Convert.ToInt32(hdnExaminerID.Value)))
        //                ExamBusiness.DeleteExamClassParticipants(Convert.ToInt32(hdnExaminerID.Value));
        //        }
        //    }
        //    BindGrid(true);
        //}

        protected void btnAddExaminer_Click(object sender, EventArgs e)
        {
            var examiner = ExamBusiness.ListAllExamClassParticipants(Convert.ToInt32(ddlExaminerName.SelectedItem.Value));

            if (examiner.Rows.Count == 0)
            {
                var user = ExamBusiness.GetExaminer().AsEnumerable().Where(w => w.Field <int>("ExaminerId") == Convert.ToInt32(ddlExaminerName.SelectedItem.Value)).FirstOrDefault();
                var dt   = ExamBusiness.ListExaminerExamPlace(ConfigurationManager.AppSettings["Exam_Term"].ToString(), Convert.ToInt32(user["ExaminerId"]));
                ExamBusiness.AddOrUpdateExamClassParticipants(
                    examinerId: Convert.ToInt32(ddlExaminerName.SelectedItem.Value),
                    examinerName: user["ExaminerName"].ToString(),
                    examinerPlaceId: Convert.ToInt32(user["ExamPlaceID"]),
                    examinerUserName: user["UserName"].ToString(),
                    password: user["UserName"].ToString() + "@1398$",
                    ePass: txtLmsPass.Text);

                BindGrid();
                RadWindowManager1.RadAlert("ثبت با موفقیت انجام شد.", 400, 100, "پیام سیستم", null);
            }
            else
            {
                RadWindowManager1.RadAlert("ممتحن قبلا برای دوره جاری ثبت شده است.", 400, 100, "پیام سیستم", null);
            }
        }