diff --git a/MDM/Controllers/Plant/PlantWorkshopController.cs b/MDM/Controllers/Plant/PlantWorkshopController.cs
index 799cd45..9065b2b 100644
--- a/MDM/Controllers/Plant/PlantWorkshopController.cs
+++ b/MDM/Controllers/Plant/PlantWorkshopController.cs
@@ -116,7 +116,7 @@ namespace MDM.Controllers.Plant
         /// <param name="site_code">工厂code</param>
         /// <returns></returns>
         [HttpGet("get_factory_site")]
-        public IActionResult  GetFactorySite(string site_code)
+        public IActionResult  GetFactorySite(string? site_code)
         {
             var response = _PlantWorkshopService.GetFactorySite(site_code);
 
diff --git a/MDM/Controllers/Process/ProcessOperationController.cs b/MDM/Controllers/Process/ProcessOperationController.cs
index cac7512..0c350e2 100644
--- a/MDM/Controllers/Process/ProcessOperationController.cs
+++ b/MDM/Controllers/Process/ProcessOperationController.cs
@@ -157,7 +157,7 @@ namespace MDM.Controllers.Process
         //TODO  获取并筛选流程
 
         [HttpGet("get_flow")]
-        public IActionResult GetFlow(string flow_type_code)
+        public IActionResult GetFlow(string? flow_type_code)
         {
             var response = _ProcessOperationService.GetFlow(flow_type_code);
             return SUCCESS(response);
diff --git a/MDM/Services/Plant/IService/IPlantProductlinebodyService.cs b/MDM/Services/Plant/IService/IPlantProductlinebodyService.cs
index 11f3750..7fd1d7c 100644
--- a/MDM/Services/Plant/IService/IPlantProductlinebodyService.cs
+++ b/MDM/Services/Plant/IService/IPlantProductlinebodyService.cs
@@ -19,10 +19,10 @@ namespace MDM.Services.IPlantService
 
         int UpdatePlantProductlinebody(PlantProductlinebody parm);
 
-       List<PlantWorkstation> GetWorkstationList(int id);
-        List<PlantFactorySite> GetFactorySite(string site_code);
+        List<PlantWorkstation> GetWorkstationList(int id);
+        List<PlantFactorySite> GetFactorySite(string? site_code);
 
-       List<PlantWorkshop>  GetWorkShop(string site_code,string workshop_code);
+        List<PlantWorkshop> GetWorkShop(string? site_code, string? workshop_code);
 
     }
 }
diff --git a/MDM/Services/Plant/IService/IPlantWorkshopService.cs b/MDM/Services/Plant/IService/IPlantWorkshopService.cs
index 4bd2d0d..eb0b5f8 100644
--- a/MDM/Services/Plant/IService/IPlantWorkshopService.cs
+++ b/MDM/Services/Plant/IService/IPlantWorkshopService.cs
@@ -19,7 +19,7 @@ namespace MDM.Services.IPlantService
 
         int UpdatePlantWorkshop(PlantWorkshop parm);
 
-       List<PlantFactorySite> GetFactorySite(string site_code);
+       List<PlantFactorySite> GetFactorySite(string? site_code);
 
     }
 }
diff --git a/MDM/Services/Plant/IService/IPlantWorkstationService.cs b/MDM/Services/Plant/IService/IPlantWorkstationService.cs
index c86b8b4..c21a3d9 100644
--- a/MDM/Services/Plant/IService/IPlantWorkstationService.cs
+++ b/MDM/Services/Plant/IService/IPlantWorkstationService.cs
@@ -20,11 +20,11 @@ namespace MDM.Services.IPlantService
 
         int UpdatePlantWorkstation(PlantWorkstation parm);
 
-        List<PlantFactorySite> GetFactorySite(string site_code);
+        List<PlantFactorySite> GetFactorySite(string? site_code);
 
-        List<PlantWorkshop> GetWorkShop(string site_code, string workshop_code);
+        List<PlantWorkshop> GetWorkShop(string? site_code, string? workshop_code);
 
-        List<PlantProductlinebody> GetPlantProductlinebodies(string site_code, string workshop_code, string linecode);
+        List<PlantProductlinebody> GetPlantProductlinebodies(string? site_code, string? workshop_code, string? linecode);
 
     }
 }
diff --git a/MDM/Services/Plant/PlantProductlinebodyService.cs b/MDM/Services/Plant/PlantProductlinebodyService.cs
index 3d10b80..335b71b 100644
--- a/MDM/Services/Plant/PlantProductlinebodyService.cs
+++ b/MDM/Services/Plant/PlantProductlinebodyService.cs
@@ -94,13 +94,13 @@ namespace MDM.Services.Plant
 
            return  Context.Queryable<PlantWorkstation>().Where(it => it.FkFactorySiteCode == productlinebody.FkFactorySiteCode && it.FkWorkshopCode == productlinebody.FkWorkshopCode && it.FkProductlinebody == productlinebody.LineCode).ToList();
         }
-        public List<PlantFactorySite> GetFactorySite(string site_code)
+        public List<PlantFactorySite> GetFactorySite(string? site_code)
         {
             return Context.Queryable<PlantFactorySite>().WhereIF(!string.IsNullOrEmpty(site_code), it => it.SiteCode.Contains(site_code)).ToList();
         }
 
 
-        public List<PlantWorkshop> GetWorkShop(string site_code, string workshop_code)
+        public List<PlantWorkshop> GetWorkShop(string? site_code, string? workshop_code)
         {
             return Context.Queryable<PlantWorkshop>()
                 .WhereIF(!string.IsNullOrEmpty(site_code), it => it.FkSiteCode.Contains(site_code))
diff --git a/MDM/Services/Plant/PlantWorkshopService.cs b/MDM/Services/Plant/PlantWorkshopService.cs
index 799e2a7..cc3c6e3 100644
--- a/MDM/Services/Plant/PlantWorkshopService.cs
+++ b/MDM/Services/Plant/PlantWorkshopService.cs
@@ -88,7 +88,7 @@ namespace MDM.Services.Plant
         }
 
 
-        public List<PlantFactorySite> GetFactorySite(string site_code)
+        public List<PlantFactorySite> GetFactorySite(string? site_code)
         {
             return Context.Queryable<PlantFactorySite>().WhereIF(!string.IsNullOrEmpty(site_code), it => it.SiteCode.Contains(site_code)).ToList();
         }
diff --git a/MDM/Services/Plant/PlantWorkstationService.cs b/MDM/Services/Plant/PlantWorkstationService.cs
index 96d6e1a..a1bfdf6 100644
--- a/MDM/Services/Plant/PlantWorkstationService.cs
+++ b/MDM/Services/Plant/PlantWorkstationService.cs
@@ -97,19 +97,19 @@ namespace MDM.Services.Plant
         }
 
 
-        public List<PlantFactorySite> GetFactorySite(string site_code)
+        public List<PlantFactorySite> GetFactorySite(string? site_code)
         {
             return Context.Queryable<PlantFactorySite>().WhereIF(!string.IsNullOrEmpty(site_code), it => it.SiteCode.Contains(site_code)).ToList();
         }
 
-        public List<PlantWorkshop> GetWorkShop(string site_code, string workshop_code)
+        public List<PlantWorkshop> GetWorkShop(string? site_code, string? workshop_code)
         {
             return Context.Queryable<PlantWorkshop>()
                 .WhereIF(!string.IsNullOrEmpty(site_code), it => it.FkSiteCode.Contains(site_code))
                 .WhereIF(!string.IsNullOrEmpty(workshop_code), it => it.WorkshopCode.Contains(workshop_code))
                 .ToList();
         }
-        public List<PlantProductlinebody> GetPlantProductlinebodies(string site_code, string workshop_code, string linecode)
+        public List<PlantProductlinebody> GetPlantProductlinebodies(string? site_code, string? workshop_code, string? linecode)
         {
             return Context.Queryable<PlantProductlinebody>()
             .WhereIF(!string.IsNullOrEmpty(site_code), it => it.FkFactorySiteCode.Contains(site_code))
diff --git a/MDM/Services/Process/IService/IProcessOperationService.cs b/MDM/Services/Process/IService/IProcessOperationService.cs
index 9ad13f8..874b0f4 100644
--- a/MDM/Services/Process/IService/IProcessOperationService.cs
+++ b/MDM/Services/Process/IService/IProcessOperationService.cs
@@ -32,7 +32,7 @@ namespace MDM.Services.IProcessService
 
         List<ProcessOprerationTransitionDict> QueryProcessOprerationTransitionDict(ProcessOprerationTransitionDictQueryDto parm);
 
-        List<ProcessFlowList>  GetFlow(string flow_type_code);
+        List<ProcessFlowList>  GetFlow(string? flow_type_code);
 
         int BindFlow(ProcessOperationBindFlowDto parm);
 
diff --git a/MDM/Services/Process/ProcessOperationService.cs b/MDM/Services/Process/ProcessOperationService.cs
index a2cd7eb..682632c 100644
--- a/MDM/Services/Process/ProcessOperationService.cs
+++ b/MDM/Services/Process/ProcessOperationService.cs
@@ -203,7 +203,7 @@ namespace MDM.Services.Process
             return response;
         }
 
-        public List<ProcessFlowList> GetFlow(string flow_type_code)
+        public List<ProcessFlowList> GetFlow(string? flow_type_code)
         {
             var response = Context.Queryable<ProcessFlowList>()
                 .WhereIF(!string.IsNullOrEmpty(flow_type_code), m => m.FlowTypeCode.Contains(flow_type_code))