diff --git a/Services/PeriodExamService.cs b/Services/PeriodExamService.cs
index 2d417e5..f4ffe78 100644
--- a/Services/PeriodExamService.cs
+++ b/Services/PeriodExamService.cs
@@ -1334,8 +1334,8 @@ namespace BMA.EHR.Recurit.Exam.Service.Services
                         candidate.PointPerC = item.PointPerC;
                         candidate.ResultC = item.ResultC;
                         candidate.Pass = item.Pass;
-                        candidate.ExamReason = item.ExamReason;
-                        candidate.Number = item.Number;
+                        candidate.ExamReason = string.IsNullOrWhiteSpace(item.ExamReason) ? null : item.ExamReason;
+                        candidate.Number = string.IsNullOrWhiteSpace(item.Number) ? null : item.Number;
                         // var subject = "แจ้งผลการสมัครสอบคัดเลือก " + periodExam.Name;
                         // var body = candidate.FirstName + " " + candidate.LastName + " สถานะการสมัครสอบ: สอบคัดเลือกสำเร็จ <br />" + "ผลการสอบของท่าน คือ " + candidate.Pass;
                         // if (candidate.Email != null && candidate.Email != "") _mailService.SendMailToUser(subject, body, candidate.Email);
@@ -1569,7 +1569,7 @@ namespace BMA.EHR.Recurit.Exam.Service.Services
                 {
                     _data.Add(new
                     {
-                        Number = item.Number != null ? item.Number.ToString() : "-",
+                        Number = item.Number != null ? item.Number.ToString() : "",
                         ExamIdenNumber = item.ExamIdenNumber != null ? item.ExamIdenNumber.ToString() : "-",
                         CitizenId = item.CitizenId != null ? item.CitizenId.ToString() : "-",
                         SeatNumber = item.SeatNumber != null ? item.SeatNumber.ToString() : "-",
@@ -1597,9 +1597,9 @@ namespace BMA.EHR.Recurit.Exam.Service.Services
 
                         Pass = item.Pass != null ? item.Pass.ToString() : "-",
                         PaymentStatus = item.PeriodExam == null || item.PeriodExam.Fee <= 0 ? "ไม่มีชำระเงิน" : (item.PaymentDate == null ? "ยังไม่ชำระเงิน" : "ชำระแล้ว"),
-                        PaymentDate = item.PaymentDate == null ? "-" : $"{item.PaymentDate.Value.ToThaiShortDate()} {item.PaymentDate.Value:HH:mm:ss.ffff}".ToString(),
+                        PaymentDate = item.PaymentDate == null ? "" : $"{item.PaymentDate.Value.ToThaiShortDate()} {item.PaymentDate.Value:HH:mm:ss.ffff}".ToString(),
                         RegisterDate = item.RegisterDate == null ? "-" : $"{item.RegisterDate.Value.ToThaiShortDate()} {item.RegisterDate.Value:HH:mm:ss.ffff}".ToString(),
-                        ExamReason = item.ExamReason != null ? item.ExamReason.ToString() : "-"
+                        ExamReason = item.ExamReason != null ? item.ExamReason.ToString() : ""
                     });
                 }
             }
@@ -1607,7 +1607,7 @@ namespace BMA.EHR.Recurit.Exam.Service.Services
             {
                 _data.Add(new
                 {
-                    Number = "-",
+                    Number = "",
                     ExamIdenNumber = "-",
                     CitizenId = "-",
                     SeatNumber = "-",
@@ -1635,9 +1635,9 @@ namespace BMA.EHR.Recurit.Exam.Service.Services
 
                     Pass = "-",
                     PaymentStatus = "-",
-                    PaymentDate = "-",
+                    PaymentDate = "",
                     RegisterDate = "-",
-                    ExamReason = "-"
+                    ExamReason = ""
                 });
             }