src/Oms.Application/Dtos/Channels/KpiAreaInfoListInput.cs

@@ -54,4 +54,14 @@ public class KpiAreaInfoListInput
     /// 截止邮编（模糊）。
     /// </summary>
     public string? RightPostcode { get; set; }
+
+    /// <summary>
+    /// 排序字段：leftPostcode / rightPostcode；空则按 Id 降序。
+    /// </summary>
+    public string? SortField { get; set; }
+
+    /// <summary>
+    /// 排序方向：asc / desc。
+    /// </summary>
+    public string? SortOrder { get; set; }
 }

src/Oms.Application/Services/Channels/KpiAreaService.cs

@@ -116,6 +116,12 @@ public class KpiAreaService : ApplicationService
         };
     }
 
+    private static readonly HashSet<string> InfoSortFieldWhitelist = new(StringComparer.OrdinalIgnoreCase)
+    {
+        "leftPostcode",
+        "rightPostcode",
+    };
+
     private static KpiAreaInfoQueryFilter BuildInfoQueryFilter(KpiAreaInfoListInput input) =>
         new()
         {
@@ -125,9 +131,38 @@ public class KpiAreaService : ApplicationService
             Province = input.Province,
             City = input.City,
             LeftPostcode = input.LeftPostcode,
-            RightPostcode = input.RightPostcode
+            RightPostcode = input.RightPostcode,
+            SortField = NormalizeInfoSortField(input.SortField),
+            SortOrder = NormalizeInfoSortOrder(input.SortOrder),
         };
 
+    private static string? NormalizeInfoSortField(string? sortField)
+    {
+        var field = sortField?.Trim();
+        if (string.IsNullOrWhiteSpace(field) || !InfoSortFieldWhitelist.Contains(field))
+        {
+            return null;
+        }
+
+        return field;
+    }
+
+    private static string? NormalizeInfoSortOrder(string? sortOrder)
+    {
+        var order = sortOrder?.Trim();
+        if (string.Equals(order, "asc", StringComparison.OrdinalIgnoreCase))
+        {
+            return "asc";
+        }
+
+        if (string.Equals(order, "desc", StringComparison.OrdinalIgnoreCase))
+        {
+            return "desc";
+        }
+
+        return null;
+    }
+
     /// <summary>
     /// 新增KPI分区明细。
     /// </summary>

src/Oms.Domain/ChannelsAggregate/Repositories/IKpiAreaRepository.cs

@@ -15,6 +15,12 @@ public class KpiAreaInfoQueryFilter
     public string? City { get; set; }
     public string? LeftPostcode { get; set; }
     public string? RightPostcode { get; set; }
+
+    /// <summary>排序字段：leftPostcode / rightPostcode。</summary>
+    public string? SortField { get; set; }
+
+    /// <summary>排序方向：asc / desc。</summary>
+    public string? SortOrder { get; set; }
 }
 
 public interface IKpiAreaRepository : IRepository<KpiArea>, IKpiAreaPublishRepository

src/Oms.SqlSugarCore/Channels/KpiAreaRepository.cs

@@ -26,9 +26,8 @@ public class KpiAreaRepository : OmsSqlSugarRepository<KpiArea>, IKpiAreaReposit
         CancellationToken cancellationToken = default)
     {
         var db = await GetDbContextAsync(cancellationToken);
-        // 依赖 idx_kpi_info_area_id (AreaId, Id)，避免大分区 filesort
-        return await BuildInfoQueryable(db, areaId, filter)
-            .OrderBy(x => x.Id, OrderByType.Desc)
+        // 默认按 Id 降序，可走 idx_kpi_info_area_id；邮编排序可能 filesort，分区过大时注意性能
+        return await ApplyInfoOrder(BuildInfoQueryable(db, areaId, filter), filter)
             .ToPageListAsync(pageIndex, pageSize, cancellationToken);
     }
 
@@ -99,6 +98,26 @@ public class KpiAreaRepository : OmsSqlSugarRepository<KpiArea>, IKpiAreaReposit
         return query;
     }
 
+    private static ISugarQueryable<KpiAreaInfo> ApplyInfoOrder(
+        ISugarQueryable<KpiAreaInfo> query,
+        KpiAreaInfoQueryFilter? filter)
+    {
+        var field = filter?.SortField?.Trim().ToLowerInvariant();
+        var asc = string.Equals(filter?.SortOrder?.Trim(), "asc", StringComparison.OrdinalIgnoreCase);
+        var order = asc ? OrderByType.Asc : OrderByType.Desc;
+
+        return field switch
+        {
+            "leftpostcode" => query
+                .OrderBy(x => x.LeftPostcode, order)
+                .OrderBy(x => x.Id, OrderByType.Desc),
+            "rightpostcode" => query
+                .OrderBy(x => x.RightPostcode, order)
+                .OrderBy(x => x.Id, OrderByType.Desc),
+            _ => query.OrderBy(x => x.Id, OrderByType.Desc),
+        };
+    }
+
     private static string? TrimOrNull(string? value)
     {
         var trimmed = value?.Trim();