EF增删库查

 public async Task<bool> Add(fu_ocrresult model)
        {
            using (var db = new GENEModel())
            {
                //1.将实体对象 a.加入 EF 对象容器中，并 b.获取 伪包装类对象
                DbEntityEntry<fu_ocrresult> entry = db.Entry<fu_ocrresult>(model);
                //2.包装类对象的状态设置
                entry.State = EntityState.Added;
                try
                {
                    //4.提交到数据库 完成修改
                    var rtn = await db.SaveChangesAsync();
                    if (rtn > )
                    {
                        return true;
                    }
                    else
                    {
                        return false;
                    }
                }
                catch (Exception ex)
                {
                    LogHelper.Error(this, ex);
                    return false;
                }
            }
        }
    public async Task<bool> Update(fu_ocrresult model)
        {
            using (var db = new GENEModel())
            {
                //1.将实体对象 a.加入 EF 对象容器中，并 b.获取 伪包装类对象
                DbEntityEntry<fu_ocrresult> entry = db.Entry<fu_ocrresult>(model);
                //2.包装类对象的状态设置
                entry.State = EntityState.Modified;
                try
                {
                    //4.提交到数据库 完成修改
                    var rtn = await db.SaveChangesAsync();
                    if (rtn > )
                    {
                        return true;
                    }
                    else
                    {
                        return false;
                    }
                }
                catch (Exception ex)
                {
                    LogHelper.Error(this, ex);
                    return false;
                }
            }
        }
    }
     /// <summary>
        /// 获取识别明细
        /// </summary>
        /// <param name="ocrresultid"></param>
        /// <returns></returns>
        public async Task<fu_ocrresult> GetOcrResult(string ocrresultid)
        {
            using (var db = new GENEModel())
            {
                var query = db.fu_ocrresult.Where(x => x.OCRResultID.Equals(ocrresultid));
                try
                {
                    var sql = query.ToString();
                    LogHelper.Info(this, sql);
                    return await query.FirstOrDefaultAsync();
                }
                catch (Exception ex)
                {
                    LogHelper.Error(this, ex);
                    return null;
                }
            }
        }

//await关键字标记的异步任务，这个异步任务必须是以Task或者Task<TResult>作为返回值的
  public class ValidateDal
    {

        #region 此类的实例化
        private static ValidateDal fwkUersDAL = null;
        /// <summary>
        /// 此类的实例化
        /// </summary>
        /// <returns></returns>
        public static ValidateDal IntiStance()
        {
            if (fwkUersDAL == null)
            {
                fwkUersDAL = new ValidateDal();
            }
            return fwkUersDAL;
        }
        #endregion
        ghcConetent dbContent = new ghcConetent();
        /// <summary>
        /// 用户登陆
        /// </summary>
        /// <param name="userName">用户名</param>
        /// <param name="password">密码</param>

        public async Task<List<FWKUSER>> CommitValidate(string userName, string password)
        {
            var result = from c in dbContent.FWK_USER
                         where (c.LOGIN_NAME == userName && c.PASSWORD == password)
                         select new FWKUSER
                         {
                             LOGIN_NAME = c.LOGIN_NAME,
                             USER_ID = c.USER_ID,
                             EMPLOYEE_ID = c.EMPLOYEE_ID
                         };
            return await result.ToListAsync();
        }
        /// <summary>
        /// 查询用户系统角色
        /// </summary>
        /// <param name="userName">用户账号</param>
        /// <param name="sysCode">系统代码</param>
        /// <returns></returns>
        public async Task<List<FWKUSER>> GetUserRoleBySysCode(string userName,string sysCode)
        {
            //左连接
            var result = from c in dbContent.FWK_USER
                         join r in dbContent.FWK_ROLE on c.ROLE_CODE equals r.ROLE_CODE into g
                         from cr in g.DefaultIfEmpty()
                         join s in dbContent.FWK_SYSTEM on c.SYSTEM_ID equals s.SYSTEM_ID into g2
                         from crs in g2.DefaultIfEmpty()
                         where (c.LOGIN_NAME == userName && crs.SYSTEM_ID == sysCode)
                         select new FWKUSER
                         {
                             LOGIN_NAME = c.LOGIN_NAME,
                             ROLE_CODE = c.ROLE_CODE,
                             ROLE_NAME = cr.ROLE_NAME,
                             SYSTEM_ID = crs.SYSTEM_ID,
                             SYSTEM_CODE = crs.SYSTEM_CODE,
                             SYSTEM_NAME = crs.SYSTEM_NAME
                         };
            return await result.ToListAsync();

        }
        /// <summary>
        /// 根据用户名密码获取菜单Id
        /// </summary>
        /// <param name="userName">用户名</param>
        /// <param name="password">密码</param>
        /// <returns></returns>
        public async Task<List<fwkMenu>> GetMenuId(string userName, string password)
        {
            var result = from c in dbContent.FWK_USER
                         join f in dbContent.FWK_USER_SYS_ROLE_REL on c.USER_ID equals f.USER_ID into g
                         from cf in g.DefaultIfEmpty()
                         join w in dbContent.FWK_ROLE on cf.ROLE_CODE equals w.ROLE_CODE into g2
                         from cfw in g2.DefaultIfEmpty()
                         join m in dbContent.FWK_ROLE_MENU_REL on cfw.ROLE_CODE equals m.ROLE_CODE into g3
                         from cfwm in g3.DefaultIfEmpty()
                         where(c.LOGIN_NAME.Equals(userName) && c.PASSWORD.Equals(password))
                         select new fwkMenu
                         {
                             Menu_Id = cfwm.MENU_ID
                         };
            return await result.ToListAsync();
        }
    }

    #region 用户及科室关系操作
        /// <summary>
        /// 更新用户及科室关系操作
        /// </summary>
        /// <param name="model">用户及科室关系model</param>
        /// <returns></returns>
        public async Task<bool> UpdateOrg(FWK_ORG_ROLE_REL model)
        {
            Boolean result = false;
            using (var tran = dbConetent.Database.BeginTransaction())
            {
                var query = from c in dbConetent.FWK_ORG_ROLE_REL
                            where (c.USER_ID.Equals(model.USER_ID))
                            select c;
                foreach (var singerModel in query)
                {
                    singerModel.ORG_ID = model.ORG_ID;

                    singerModel.USER_ID = model.USER_ID;
                    DbEntityEntry<FWK_ORG_ROLE_REL> entry = dbConetent.Entry<FWK_ORG_ROLE_REL>(singerModel);
                    entry.State = EntityState.Modified;

                    int trn = ;
                    try
                    {
                        trn = await dbConetent.SaveChangesAsync();
                        tran.Commit();
                        if (trn > )
                        {
                            result = true;
                        }
                        else
                        {
                            result = false;
                        }
                    }
                    catch (Exception ex)
                    {
                        LogHelper.Info(this, ex);
                        tran.Rollback();
                        result = false;

                    }

                }
                return result;
            }

        }
        /// <summary>
        /// 删除用户及科室关系
        /// </summary>
        /// <param name="model">用户及科室关系model</param>
        /// <returns></returns>
        public async Task<bool> DeleteOrg(FWK_ORG_ROLE_REL model)
        {
            Boolean result = false;
            var query = from c in dbConetent.FWK_ORG_ROLE_REL
                        where (c.USER_ID.Equals(model.USER_ID) && c.ORG_ID.Equals(model.ORG_ID))
                        select c;
            using (var tran = dbConetent.Database.BeginTransaction())
            {
                foreach (var singerModel in query)
                {
                    DbEntityEntry<FWK_ORG_ROLE_REL> entry = dbConetent.Entry<FWK_ORG_ROLE_REL>(singerModel);
                    entry.State = EntityState.Deleted;
                    try
                    {
                        int rtn = await dbConetent.SaveChangesAsync();
                        tran.Commit();
                        if (rtn > )
                        {
                            result = true;
                        }
                        else
                        {
                            result = false;
                        }
                    }
                    catch (Exception ex)
                    {
                        LogHelper.Info(this, ex);
                        tran.Rollback();
                        result = false;
                    }

                }
                return result;
            }
        }
        /// <summary>
        /// 增加用户及科室关系
        /// </summary>
        /// <param name="model">用户及科室关系model</param>
        /// <returns></returns>
        public async Task<bool> InsertOrg(FWK_ORG_ROLE_REL model)
        {
            Boolean result = false;

            using (var tran = dbConetent.Database.BeginTransaction())
            {
                FWK_ORG_ROLE_REL mode = new FWK_ORG_ROLE_REL();
                mode.USER_ID = model.USER_ID;
                mode.ORG_ID = model.ORG_ID;
                mode.AUOT_ID = model.AUOT_ID;
                DbEntityEntry<FWK_ORG_ROLE_REL> entry = dbConetent.Entry<FWK_ORG_ROLE_REL>(mode);
                entry.State = EntityState.Added;

                try
                {
                    int rtn = await dbConetent.SaveChangesAsync();
                    tran.Commit();
                    if (rtn > )
                    {
                        result = true;
                    }
                    else
                    {
                        result = false;
                    }
                }
                catch (Exception ex)
                {

                    LogHelper.Info(this, ex);
                    tran.Rollback();
                    result = false;
                }

                return result;
            }
        }
        #endregion