diff --git a/src/Shentun.Peis.Domain/EntityHelper.cs b/src/Shentun.Peis.Domain/EntityHelper.cs
index ec29b67..260725e 100644
--- a/src/Shentun.Peis.Domain/EntityHelper.cs
+++ b/src/Shentun.Peis.Domain/EntityHelper.cs
@@ -18,10 +18,10 @@ using static Microsoft.EntityFrameworkCore.DbLoggerCategory;
 
 namespace Shentun.Peis
 {
-    public  class EntityHelper
+    public class EntityHelper
     {
-        private static  ICachedServiceProvider _serviceProvider;
-       
+        private static ICachedServiceProvider _serviceProvider;
+
         /// <summary>
         /// 创建最大显示顺序
         /// </summary>
@@ -115,16 +115,19 @@ namespace Shentun.Peis
             {
                 UptList = (await repository.GetListAsync(o => o.DisplayOrder < entity.DisplayOrder)).OrderByDescending(o => o.DisplayOrder).ToList(); ;
 
-                int indexnum = entity.DisplayOrder;  //原有值
+                if (UptList.Count > 0)
+                {
+                    int indexnum = entity.DisplayOrder;  //原有值
 
-                entity.DisplayOrder = UptList[UptList.Count - 1].DisplayOrder;  //修改当前排序值为最小  
+                    entity.DisplayOrder = UptList[UptList.Count - 1].DisplayOrder;  //修改当前排序值为最小  
 
-                //置底操作，往下一行开始，逐渐替换
-                foreach (var item in UptList)
-                {
-                    int dqnum = item.DisplayOrder;
-                    item.DisplayOrder = indexnum;
-                    indexnum = dqnum;
+                    //置底操作，往下一行开始，逐渐替换
+                    foreach (var item in UptList)
+                    {
+                        int dqnum = item.DisplayOrder;
+                        item.DisplayOrder = indexnum;
+                        indexnum = dqnum;
+                    }
                 }
             }
 
@@ -603,15 +606,15 @@ namespace Shentun.Peis
         /// </summary>
         /// <param name="UserId"></param>
         /// <returns></returns>
-        private static async Task<string> GetUserNameFromCache( Guid? UserId)
+        private static async Task<string> GetUserNameFromCache(Guid? UserId)
         {
-           
-           
-                var cacheService = _serviceProvider.GetRequiredService<CacheService>();
-                var userName = await cacheService.GetUserNameAsync(UserId);
-                return userName;
-            
-            
+
+
+            var cacheService = _serviceProvider.GetRequiredService<CacheService>();
+            var userName = await cacheService.GetUserNameAsync(UserId);
+            return userName;
+
+
         }
 
 
@@ -643,7 +646,7 @@ namespace Shentun.Peis
                     return "";
             }
         }
-       
+
         /// <summary>
         /// 获取顶级目录单位名称  单位
         /// </summary>