資料庫：SqlServer為例
安裝包：
資料庫連線
DbContext
public class TestDbContext:DbContext { public TestDbContext(DbContextOptions<TestDbContext> options) : base(options) { } public DbSet<User> Users { get; set; } }
註冊資料庫上下文
builder.Services.AddDbContext<TestDbContext>(options => { options.UseSqlServer("ConnectionString"); }); //依賴注入倉儲 builder.Services.AddTransient(typeof(IRepository<>),typeof(BaseRepository<>));
倉儲介面----IRepository
public interface IRepository<T> where T : class { /// <summary> /// 新增 /// </summary> /// <param name="t">要新增的資訊</param> void Insert(T t); /// <summary> /// 新增 /// </summary> /// <param name="t">要新增的資訊</param> Task InsertAsync(T t); /// <summary> /// 批次新增 /// </summary> /// <param name="t">要新增的資訊</param> void InsertRange(List<T> t); /// <summary> /// 批次新增 /// </summary> /// <param name="t">要新增的資訊</param> Task InsertRangeAsync(List<T> t); /// <summary> /// 更新單個物件 /// </summary> /// <param name="t">要更改的資訊</param> void Update(T t); /// <summary> /// 單個更新物件-非同步 /// </summary> /// <param name="t">要更改的資訊</param> Task UpdateAsync(T t); /// <summary> /// 批次更新 /// </summary> /// <param name="t">要修改的資訊</param> void UpdateRange(List<T> t); /// <summary> /// 批次更新-非同步 /// </summary> /// <param name="t">要修改的資訊</param> Task UpdateRangeAsync(List<T> t); /// <summary> /// 刪除 /// </summary> /// <param name="t">要刪除的資訊</param> void Delete(T t); /// <summary> /// 刪除-非同步 /// </summary> /// <param name="t">要刪除的資訊</param> Task DeleteAsync(T t); /// <summary> /// 批次刪除 /// </summary> /// <param name="t">要刪除的資訊</param> void DeleteRange(List<T> t); /// <summary> /// 批次刪除-非同步 /// </summary> /// <param name="t">要刪除的資訊</param> Task DeleteRangeAsync(List<T> t); /// <summary> /// 單個查詢 /// </summary> /// <param name="id">要獲取物件的編號</param> /// <returns>物件</returns> T Get(int id); /// <summary> /// 單個查詢=非同步 /// </summary> /// <param name="id">要獲取物件的編號</param> /// <returns></returns> Task<T> GetAsync(int id); /// <summary> /// 獲取物件列表 /// </summary> /// <returns>物件集合</returns> IQueryable<T> GetAll(); /// <summary> /// 分頁查詢 /// </summary> /// <param name="pageindex">頁碼</param> /// <param name="pagesize">每頁獲取數量</param> /// <param name="where">條件查詢</param> /// <param name="orderBy">條件排序</param> /// <param name="orderAsc">true 升序</param> /// <param name="totalcount">總條數</param> /// <returns>物件集合</returns> IQueryable<T> GetPage(int pageindex, int pagesize, Func<T, bool> where, Func<T, DateTime> orderBy, bool orderAsc, out int totalcount); }
倉儲實現---BaseRepository
public class BaseRepository<T> : IRepository<T> where T : class, new() { private readonly TestDbContext _context; public BaseRepository(TestDbContext context) { _context = context; } #region 刪除 /// <summary> /// 單個刪除 /// </summary> /// <param name="t">帶主鍵的實體</param> public void Delete(T t) { _context.Remove(t); } /// <summary> /// 單個刪除-非同步 /// </summary> /// <param name="t">帶主鍵的實體</param> /// <returns></returns> public async Task DeleteAsync(T t) { await Task.Run(() => _context.Remove(t)); } /// <summary> /// 批次刪除 /// </summary> /// <param name="t">帶主鍵的實體集合</param> public void DeleteRange(List<T> t) { _context.RemoveRange(t); } /// <summary> /// 批次刪除-非同步 /// </summary> /// <param name="t">帶主鍵的實體集合</param> /// <returns></returns> public async Task DeleteRangeAsync(List<T> t) { await Task.Run(() => _context.Set<T>().RemoveRange(t)); } #endregion #region 查詢 /// <summary> /// 單個查詢 /// </summary> /// <param name="id">主鍵</param> /// <returns></returns> public T Get(int id) { return _context.Find<T>(id) ?? new T(); } /// <summary> /// 集合查詢 /// </summary> /// <returns></returns> public IQueryable<T> GetAll() { return _context.Set<T>().AsNoTracking(); } /// <summary> /// 單個查詢-非同步 /// </summary> /// <param name="id">主鍵</param> /// <returns></returns> public async Task<T> GetAsync(int id) { return await _context.FindAsync<T>(id) ?? new T(); } /// <summary> /// 分頁查詢 /// </summary> /// <param name="pageindex">頁碼</param> /// <param name="pagesize">每頁獲取數量</param> /// <param name="where"></param> /// <param name="orderBy"></param> /// <param name="orderAsc"></param> /// <param name="totalcount">結果總條數</param> /// <returns></returns> public IQueryable<T> GetPage(int pageindex, int pagesize, Func<T, bool> where, Func<T, DateTime> orderBy, bool orderAsc, out int totalcount) { var query = GetAll().Where(where); if (orderAsc) { query = query.OrderBy(orderBy); //query = query.OrderBy(orderBy).AsQueryable(); } else { query = query.OrderBy(orderBy); //query = query.OrderByDescending(orderBy).AsQueryable() ; } totalcount = query.Count(); return query.Skip((pageindex - 1) * pagesize).Take(pagesize).AsQueryable(); } #endregion #region 新增 /// <summary> /// 新增 /// </summary> /// <param name="t"></param> public void Insert(T t) { _context.Add(t); } /// <summary> /// 單個新增 /// </summary> /// <param name="t"></param> /// <returns></returns> public async Task InsertAsync(T t) { await _context.AddAsync(t); } /// <summary> /// 批次新增 /// </summary> /// <param name="t"></param> public void InsertRange(List<T> t) { _context.AddRange(t); } /// <summary> /// 批次新增-非同步 /// </summary> /// <param name="t"></param> /// <returns></returns> public async Task InsertRangeAsync(List<T> t) { await _context.AddRangeAsync(t); } #endregion #region 更新 /// <summary> /// 更新單個物件 /// </summary> /// <param name="t">更新物件</param> public void Update(T t) { _context.Update(t); } /// <summary> /// 更新單個物件-非同步 /// </summary> /// <param name="t">更新物件</param> /// <returns></returns> public async Task UpdateAsync(T t) { await Task.Run(() => { _context.Update(t); }); } /// <summary> /// 批次更新 /// </summary> /// <param name="t"></param> public void UpdateRange(List<T> t) { _context.UpdateRange(t); } /// <summary> /// 批次更新-非同步 /// </summary> /// <param name="t"></param> /// <returns></returns> public async Task UpdateRangeAsync(List<T> t) { await Task.Run(() => { _context.UpdateRange(); }); } #endregion public bool SaveChange() { return _context.SaveChanges() > 0; } public async Task<bool> SaveChangeAsync() { return await _context.SaveChangesAsync() > 0; } }
倉儲使用
public class UserService: IUserService { private readonly IRepository<User> _userRepository; public UserService(IRepository<User> userRepository) { _userRepository = userRepository; } public async Task GetUsers(string name) { var result= await _userRepository.GetAll().Where(u => u.Name == name).ToListAsync(); } }