diff --git a/EquipMgr/Tnb.EquipMgr/EquipmentService.cs b/EquipMgr/Tnb.EquipMgr/EquipmentService.cs
index f73e11f5..3ca12c85 100644
--- a/EquipMgr/Tnb.EquipMgr/EquipmentService.cs
+++ b/EquipMgr/Tnb.EquipMgr/EquipmentService.cs
@@ -89,7 +89,7 @@ namespace Tnb.EquipMgr
         
         private async Task<dynamic> Create(VisualDevModelDataCrInput visualDevModelDataCrInput)
         {
-            string qrcode = visualDevModelDataCrInput.data.ContainsKey("qrcode") ? visualDevModelDataCrInput.data["qrcode"].ToString() : "";
+            string qrcode = visualDevModelDataCrInput.data.ContainsKey("qrcode") ? visualDevModelDataCrInput.data["qrcode"]?.ToString() : "";
             if (!string.IsNullOrEmpty(qrcode) && await _repository.AsSugarClient().Queryable<BasQrcode>().AnyAsync(x => x.code == qrcode))
             {
                 throw Oops.Bah("二维码总表中已存在该二维码");
@@ -120,7 +120,7 @@ namespace Tnb.EquipMgr
         
         private async Task<dynamic> Update(string id,VisualDevModelDataUpInput visualDevModelDataUpInput)
         {
-            string qrcode = visualDevModelDataUpInput.data.ContainsKey("qrcode") ? visualDevModelDataUpInput.data["qrcode"].ToString() : "";
+            string qrcode = visualDevModelDataUpInput.data.ContainsKey("qrcode") ? visualDevModelDataUpInput.data["qrcode"]?.ToString() : "";
             if (!string.IsNullOrEmpty(qrcode) && await _repository.AsSugarClient().Queryable<BasQrcode>().AnyAsync(x => x.code == visualDevModelDataUpInput.data["qrcode"] && x.source_id!=id))
             {
                 throw Oops.Bah("二维码总表中已存在该二维码");