diff --git a/EquipMgr/Tnb.EquipMgr/EquMaintainRecordService.cs b/EquipMgr/Tnb.EquipMgr/EquMaintainRecordService.cs
index 9c21e062..043561b7 100644
--- a/EquipMgr/Tnb.EquipMgr/EquMaintainRecordService.cs
+++ b/EquipMgr/Tnb.EquipMgr/EquMaintainRecordService.cs
@@ -56,8 +56,8 @@ namespace Tnb.EquipMgr
             Dictionary<string, object>? queryJson = (input==null || string.IsNullOrEmpty(input.queryJson)) ? new Dictionary<string, object>() : input.queryJson.ToObject<Dictionary<string, object>>();
             string equioInfo = queryJson.ContainsKey("query_info") ? (queryJson["query_info"].ToString() ?? "") : "";
             string status = queryJson.ContainsKey("status") ? (queryJson["status"].ToString() ?? "") : "";
-            DateTime? start_time = queryJson.ContainsKey("start_time") ? (DateTime?)queryJson["start_time"] : null;
-            DateTime? end_time = queryJson.ContainsKey("end_time") ? (DateTime?)queryJson["end_time"] : null;
+            DateTime? start_time = queryJson.ContainsKey("start_time") ? queryJson["start_time"].ToString()=="" ? null : Convert.ToDateTime(queryJson["start_time"]) : null;
+            DateTime? end_time = queryJson.ContainsKey("end_time") ? queryJson["end_time"].ToString()=="" ? null : Convert.ToDateTime(queryJson["end_time"]) : null;
             
             if (string.IsNullOrEmpty(input.sidx))
             {
diff --git a/EquipMgr/Tnb.EquipMgr/EquSpotInsRecordService.cs b/EquipMgr/Tnb.EquipMgr/EquSpotInsRecordService.cs
index 39eb0c0f..936f43dc 100644
--- a/EquipMgr/Tnb.EquipMgr/EquSpotInsRecordService.cs
+++ b/EquipMgr/Tnb.EquipMgr/EquSpotInsRecordService.cs
@@ -57,8 +57,8 @@ namespace Tnb.EquipMgr
             Dictionary<string, object>? queryJson = (input==null || string.IsNullOrEmpty(input.queryJson)) ? new Dictionary<string, object>() : input.queryJson.ToObject<Dictionary<string, object>>();
             string equioInfo = queryJson.ContainsKey("query_info") ? (queryJson["query_info"].ToString() ?? "") : "";
             string status = queryJson.ContainsKey("status") ? (queryJson["status"].ToString() ?? "") : "";
-            DateTime? start_time = queryJson.ContainsKey("start_time") ? (DateTime?)queryJson["start_time"] : null;
-            DateTime? end_time = queryJson.ContainsKey("end_time") ? (DateTime?)queryJson["end_time"] : null;
+            DateTime? start_time = queryJson.ContainsKey("start_time") ? queryJson["start_time"].ToString()=="" ? null : Convert.ToDateTime(queryJson["start_time"]) : null;
+            DateTime? end_time = queryJson.ContainsKey("end_time") ? queryJson["end_time"].ToString()=="" ? null : Convert.ToDateTime(queryJson["end_time"]) : null;
             
             if (string.IsNullOrEmpty(input.sidx))
             {
diff --git a/ProductionMgr/Tnb.ProductionMgr/PrdPackReportService.cs b/ProductionMgr/Tnb.ProductionMgr/PrdPackReportService.cs
index 02f4e4c8..1bc6d536 100644
--- a/ProductionMgr/Tnb.ProductionMgr/PrdPackReportService.cs
+++ b/ProductionMgr/Tnb.ProductionMgr/PrdPackReportService.cs
@@ -362,8 +362,8 @@ namespace Tnb.ProductionMgr
             Dictionary<string, object> queryJson = string.IsNullOrEmpty(input.queryJson) ? new Dictionary<string, object>() : input.queryJson.ToObject<Dictionary<string, object>>();
             string mo_task_code = queryJson.ContainsKey("mo_task_code") ? queryJson["mo_task_code"].ToString() : "";
             string status = queryJson.ContainsKey("status") ? queryJson["status"].ToString() : "";
-            DateTime? start_time = queryJson.ContainsKey("start_time") ? (DateTime?)queryJson["start_time"] : null;
-            DateTime? end_time = queryJson.ContainsKey("end_time") ? (DateTime?)queryJson["end_time"] : null;
+            DateTime? start_time = queryJson.ContainsKey("start_time") ? queryJson["start_time"].ToString()=="" ? null : Convert.ToDateTime(queryJson["start_time"]) : null;
+            DateTime? end_time = queryJson.ContainsKey("end_time") ? queryJson["end_time"].ToString()=="" ? null : Convert.ToDateTime(queryJson["end_time"]) : null;
             List<string> statusList = new List<string>();
             if (!string.IsNullOrEmpty(status))
             {