diff --git a/Api/Ewide.Application/Service/HouseCode/HouseCodeService.cs b/Api/Ewide.Application/Service/HouseCode/HouseCodeService.cs
index f468ddf..5534b39 100644
--- a/Api/Ewide.Application/Service/HouseCode/HouseCodeService.cs
+++ b/Api/Ewide.Application/Service/HouseCode/HouseCodeService.cs
@@ -12,9 +12,15 @@ using Microsoft.EntityFrameworkCore;
 using System.Threading.Tasks;
 using Dapper;
 using Ewide.Core.Extension;
+using System.ComponentModel.DataAnnotations;
+using System.Linq;
 
 namespace Ewide.Application.Service.HouseCode
 {
+    /// <summary>
+    /// 房屋编码相关
+    /// </summary>
+    [ApiDescriptionSettings(Name = "HouseCode", Order = 180)]
     public class HouseCodeService : IHouseCodeService, IDynamicApiController, ITransient
     {
         private readonly IRepository<BsHouseCode> _houseCodeRep;
@@ -30,7 +36,7 @@ namespace Ewide.Application.Service.HouseCode
         public async Task AddHouseCode(AddHouseCodeInput input)
         {
             var areaCodeRep = Db.GetRepository<SysAreaCode>();
-            var areaCode = await areaCodeRep.DetachedEntities.FirstOrDefaultAsync(a => a.Code == input.AreaCode);
+            var areaCode = await areaCodeRep.DetachedEntities.FirstOrDefaultAsync(a => a.Code == input.AreaCode && a.LevelType == 4);
             if(areaCode == null) throw Oops.Oh("区域编码有误，添加失败");
             input.HouseCode = areaCode.AdCode + input.No.ToString().PadLeft(3, '0');
             var houseCode = input.Adapt<BsHouseCode>();
@@ -63,5 +69,23 @@ LEFT JOIN sys_area_code RA ON RA.AdCode = SUBSTR(CA.AdCode,1,9)
 LEFT JOIN sys_area_code AA ON AA.AdCode = SUBSTR(CA.AdCode,1,6) WHERE HC.Address like @Address";
             return await _dapperRepository.QueryPageData(sql, input, param: new { Address = '%' + input.Address + '%' });
         }
+
+        /// <summary>
+        /// 获取同一区域下的下一个编号
+        /// </summary>
+        /// <param name="areaCode"></param>
+        /// <returns></returns>
+        [HttpGet("/houseCode/GetNextNoByFullNumber")]
+        public async Task<dynamic> GetNextNoByFullNumber([Required] string areaCode)
+        {
+            var areaCodeRep = Db.GetRepository<SysAreaCode>();
+            //取到社区编码
+            var commAreaCode = await areaCodeRep.FirstOrDefaultAsync(a => a.Code == areaCode && a.LevelType == 4);
+            if(commAreaCode == null) throw Oops.Oh("区域编码有误，房屋编码生成失败");
+            var maxNo = await _houseCodeRep.DetachedEntities
+                .Where(h => h.HouseCode.Contains(commAreaCode.AdCode))
+                .MaxAsync(h => (int?)h.No);
+            return maxNo.GetValueOrDefault(0) + 1;
+        }
     }
 }
diff --git a/Api/Ewide.Core/Extension/PageExtensions.cs b/Api/Ewide.Core/Extension/PageExtensions.cs
index f80f55f..1fb8905 100644
--- a/Api/Ewide.Core/Extension/PageExtensions.cs
+++ b/Api/Ewide.Core/Extension/PageExtensions.cs
@@ -1,6 +1,7 @@
 using Dapper;
 using Furion.DatabaseAccessor;
 using Mapster;
+using System;
 using System.Collections.Generic;
 using System.Data;
 using System.Linq;
@@ -40,13 +41,6 @@ namespace Ewide.Core.Extension
             return orderStr;
         }
 
-        private static string PageSqlBuilder(string sql, PageInputBase input)
-        {
-            var orderStr = OrderBuilder(input);
-            var r = "SELECT * FROM (" + sql + ") T " + (string.IsNullOrEmpty(orderStr) ? string.Empty : "ORDER BY " + orderStr) + " LIMIT " + ((input.PageNo - 1) * input.PageSize).ToString() + "," + input.PageSize.ToString();
-            return r;
-        }
-
         public static Task<PagedList<T>> ToPageData<T>(this IQueryable<T> source, PageInputBase input) where T : new()
         {
             return source.OrderBy(OrderBuilder<T>(input)).ToPagedListAsync(input.PageNo, input.PageSize);
@@ -78,5 +72,16 @@ namespace Ewide.Core.Extension
                 commandType: commandType
             );
         }
+
+        private static string PageSqlBuilder(string sql , PageInputBase input)
+        {
+            var sqlStrList = new List<string>();
+            var orderStr = OrderBuilder(input);
+            if (!string.IsNullOrEmpty(orderStr)) sqlStrList.Add(" ORDER BY " + orderStr);
+            // input.PageSize = 0表示不分页
+            if (input.PageSize != 0) sqlStrList.Add(" LIMIT " + ((input.PageNo - 1) * input.PageSize).ToString() + "," + input.PageSize.ToString());
+            sql += String.Join("", sqlStrList);
+            return sql;
+        }
     }
 }