修改创建下级子商户bug问题

Waste.Application/Business/BusinessService.cs

@@ -321,8 +321,7 @@ namespace Waste.Application
                     parentid = currentUser.BusinessId;
                     var bcode = currentUser.BusinessCode;
                     var len = bcode.Length;
-                    var maxcode = await dbClient.Queryable<W_Business>().Where(x => SqlFunc.StartsWith(x.Code, code) && SqlFunc.Length(x.Code) > len).MaxAsync(x => x.Code);
-                    var cnt = maxcode.Substring(maxcode.Length - 4).ToInt();
+                    int  cnt = await dbClient.Queryable<W_Business>().Where(x => x.ParentId == parentid).CountAsync();
                     code = GenCode(bcode, cnt);
                 }
                 else