复制文件时覆盖原有文件

24Hour/Controllers/Common/LawyerArchivesController.cs

@@ -2062,7 +2062,7 @@ namespace _24Hour.Controllers.Common
                     var userdir = Path.Combine(packegdir, "users", item.cardId);
 
                     //保存身份证图片
-                    var cardids = item.cardIdphoto.ConvertToModel<List<string>>();
+                    var cardids = item.cardIdphoto.ConvertToModel<List<string>>() ?? new List<string>();
                     var cardidDir = Path.Combine(userdir, "cardids");
                     if (Directory.Exists(cardidDir) == false) Directory.CreateDirectory(cardidDir);
                     foreach (var file in cardids)