/// <summary> /// 添加(判断Account是否已存在) /// </summary> /// <param name="entity"></param> /// <returns>-1: 失败 , 0:已存在 ,1:成功</returns> public async Task <(string Error, User user)> InsertAsync(User entity) { //已存在 int count = await UserRep.GetCountAsync(o => o.Account == entity.Account); if (count > 0) { return("帐号已存在", null); } await UserRep.AddAsync(entity); return(string.Empty, null); }