添加项目文件。

Service/Implement/TestReportService.cs

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+using Model;
+using Model.Entity;
+using Model.Models;
+using ORM;
+using Service.Interface;
+using SqlSugar;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+using static System.Formats.Asn1.AsnWriter;
+
+namespace Service.Implement
+{
+    public class TestReportService : BaseService<TestReportEntity>, ITestReportService
+    {
+        public TestReportService(SqlSugarRepository<TestReportEntity> repository) : base(repository)
+        {
+        }
+
+        /// <summary>
+        /// 根据 TestRoundId 获取符合条件的测试步骤
+        /// </summary>
+        public async Task<Result<List<TestReportEntity>>> GetByTestRoundIdAsync(Guid testRoundId)
+        {
+            try
+            {
+                var list = await _repository.Entities
+                    .Where(x => x.TestRoundId == testRoundId)
+                    .ToListAsync();
+
+                return Result<List<TestReportEntity>>.Success(list);
+            }
+            catch (Exception ex)
+            {
+                return Result<List<TestReportEntity>>.Error("根据 TestRoundId 查询数据失败", ex);
+            }
+        }
+
+        /// <summary>
+        /// 根据 TestRoundId 分组，获取唯一记录并按分组统计最大与最小时间，
+        /// 支持按日期范围与台架名称筛选。
+        /// </summary>
+        public async Task<Result<IList<TestReportModel>>> GetFilterList(DateTime? startTime = null, DateTime? endTime = null, string? scope = null)
+        {
+            try
+            {
+                // 使用 SqlSugar 的 GroupBy 查询，聚合最大/最小时间
+                // 推荐采用这种按组投影的方式，将分组计算交由数据库处理，性能最佳
+                var query = _repository.Context.Queryable<TestReportEntity>();
+
+                // 日期范围筛选
+                if (startTime.HasValue)
+                    query = query.Where(x => x.CreateTime >= startTime.Value);
+                if (endTime.HasValue)
+                    query = query.Where(x => x.CreateTime <= endTime.Value);
+
+                // 台架名称筛选
+                if (!string.IsNullOrEmpty(scope))
+                    query = query.Where(x => x.Scope == scope);
+
+                var list = await query
+                    .GroupBy(x => x.TestRoundId)
+                    .Select(x => new TestReportModel
+                    {
+                        TestRoundId = x.TestRoundId,
+                        StartTime = SqlFunc.AggregateMin(x.CreateTime),
+                        EndTime = SqlFunc.AggregateMax(x.CreateTime),
+                        Scope = x.Scope,
+                        FileName = x.FileName,
+                    })
+                    .ToListAsync();
+
+                return Result<IList<TestReportModel>>.Success(list);
+            }
+            catch (Exception ex)
+            {
+                return Result<IList<TestReportModel>>.Error("获取分组过滤列表失败", ex);
+            }
+        }
+        /// <summary>
+        /// 根据日期和台架名称筛选获取完整的测试步骤实体列表（无分组，用于导出）
+        /// </summary>
+        public async Task<Result<List<TestReportEntity>>> GetEntitiesByFilter(DateTime? startTime = null, DateTime? endTime = null, string? scope = null)
+        {
+            try
+            {
+                var query = _repository.Context.Queryable<TestReportEntity>();
+
+                if (startTime.HasValue)
+                    query = query.Where(x => x.CreateTime >= startTime.Value);
+                if (endTime.HasValue)
+                    query = query.Where(x => x.CreateTime <= endTime.Value);
+                if (!string.IsNullOrEmpty(scope))
+                    query = query.Where(x => x.Scope == scope);
+
+                var list = await query
+                    .OrderBy(x => x.CreateTime)
+                    .ToListAsync();
+
+                return Result<List<TestReportEntity>>.Success(list);
+            }
+            catch (Exception ex)
+            {
+                return Result<List<TestReportEntity>>.Error("获取导出数据失败", ex);
+            }
+        }
+    }
+}