diff --git a/ZR.Service/Business/OdfPortsService.cs b/ZR.Service/Business/OdfPortsService.cs
index f46098d..f6aff5e 100644
--- a/ZR.Service/Business/OdfPortsService.cs
+++ b/ZR.Service/Business/OdfPortsService.cs
@@ -196,13 +196,13 @@ namespace ZR.Service.Business
                     RowNumber = it.RowNumber,
                     PortNumber = it.PortNumber,
                     Status = it.Status,
-                    Remarks = it.Remarks,
-                    OpticalAttenuation = it.OpticalAttenuation,
-                    HistoryRemarks = it.HistoryRemarks,
-                    DeptName = it.DeptName,
-                    OpticalCableOffRemarks = it.OpticalCableOffRemarks,
-                    EquipmentModel = it.EquipmentModel,
-                    BusinessType = it.BusinessType
+                    Remarks = it.Remarks ?? "",
+                    OpticalAttenuation = it.OpticalAttenuation ?? "",
+                    HistoryRemarks = it.HistoryRemarks ?? "",
+                    DeptName = it.DeptName ?? "",
+                    OpticalCableOffRemarks = it.OpticalCableOffRemarks ?? "",
+                    EquipmentModel = it.EquipmentModel ?? "",
+                    BusinessType = it.BusinessType ?? ""
                 })
                 .ToPage(parm);