diff --git a/asg_form/Controllers/BlackController.cs b/asg_form/Controllers/BlackController.cs
index f9ddd5b..fe918ea 100644
--- a/asg_form/Controllers/BlackController.cs
+++ b/asg_form/Controllers/BlackController.cs
@@ -35,10 +35,10 @@ namespace asg_form.Controllers
         public string id { get; set; }
         public string recordTime { get; set; }
         public string violator { get; set; }
-        public string platformRecord { get; set; }
-        public string offendingDetails { get; set; }
-        public string processingResult { get; set; }
-        public string featureId { get; set; }
+        public string? platformRecord { get; set; }
+        public string? offendingDetails { get; set; }
+        public string? processingResult { get; set; }
+        public string? featureId { get; set; }
     }
 
     public class BlackController : ControllerBase
@@ -122,11 +122,11 @@ namespace asg_form.Controllers
                 var  dataAvb = sub.T_blacks.FirstOrDefault(n => n.id.ToString() == datas.id);
                 if(dataAvb!=null)
                 {
-                    dataAvb.record_time = datas.recordTime;
-                    dataAvb.violator = datas.violator;
-                    dataAvb.platform_record =dataAvb.platform_record;
-                    dataAvb.offending_details = dataAvb.offending_details;
-                    dataAvb.platform_record = dataAvb.platform_record;
+                    if (datas.recordTime!=null) dataAvb.record_time = datas.recordTime;
+                    if (datas.violator != null) dataAvb.violator = datas.violator;
+                    if (dataAvb.platform_record != null) dataAvb.platform_record =dataAvb.platform_record;
+                    if (dataAvb.offending_details != null) dataAvb.offending_details = dataAvb.offending_details;
+                    if (dataAvb.platform_record != null) dataAvb.platform_record = dataAvb.platform_record;
                     dataAvb.recorder = user.chinaname;
                     await sub.SaveChangesAsync();
                     return Ok(new error_mb { code = 200, message = "成功修改" });