.net Core——SqlSugar使用

一、DbContext配置

    public class DbContext
    {
        public DbContext()
        {
            Db = new SqlSugarClient(new ConnectionConfig()
            {
                ConnectionString = "server=120.79.21.96;uid=Test;pwd=Test;database=Test",
                DbType = DbType.MySql,
                InitKeyType = InitKeyType.Attribute,//从特性读取主键和自增列信息
                IsAutoCloseConnection = true,//开启自动释放模式和EF原理一样我就不多解释了
            });
            //调式代码 用来打印SQL 
            Db.Aop.OnLogExecuting = (sql, pars) =>
            {
                Console.WriteLine(sql + "
" +
                    Db.Utilities.SerializeObject(pars.ToDictionary(it => it.ParameterName, it => it.Value)));
                Console.WriteLine();
            };
        }
        //注意：不能写成静态的，不能写成静态的
        public SqlSugarClient Db;//用来处理事务多表查询和复杂的操作
    }

二、使用

        public IActionResult GetInit()
        {
            DbContext db = new DbContext();

            List<DbList> a =db.Db.SqlQueryable<DbList>("SELECT a.SubG_ID,a.SubG_GroupName, d.User_Id, d.User_Name, d.User_Avatar FROM SubGroup AS a LEFT JOIN User_SubGroup AS b ON a.SubG_ID = b.SubG_ById INNER JOIN Friend AS c ON b.User_Id = c.Frie_ById INNER JOIN Users AS d ON d.User_Id = c.Frie_ById WHERE c.User_Id = 5  ").ToList();

            string str = "{"code":0,"msg":"","data":{"mine":{"username":"纸飞机","id":"100000","status":"online","sign":"在深邃的编码世界，做一枚轻盈的纸飞机","avatar":"http://cdn.firstlinkapp.com/upload/2016_6/1465575923433_33812.jpg"},"friend":[{"groupname":"前端码屌","id":1,"online":2,"list":[{"username":"贤心","id":"100001","avatar":"http://tp1.sinaimg.cn/1571889140/180/40030060651/1","sign":"这些都是测试数据，实际使用请严格按照该格式返回"},{"username":"Z_子晴","id":"108101","avatar":"http://tva3.sinaimg.cn/crop.0.0.512.512.180/8693225ajw8f2rt20ptykj20e80e8weu.jpg","sign":"微电商达人"},{"username":"Lemon_CC","id":"102101","avatar":"http://tp2.sinaimg.cn/1833062053/180/5643591594/0","sign":""},{"username":"马小云","id":"168168","avatar":"http://tp4.sinaimg.cn/2145291155/180/5601307179/1","sign":"让天下没有难写的代码"},{"username":"徐小峥","id":"666666","avatar":"http://tp2.sinaimg.cn/1783286485/180/5677568891/1","sign":"代码在囧途，也要写到底"}]},{"groupname":"网红","id":2,"online":3,"list":[{"username":"罗玉凤","id":"121286","avatar":"http://tp1.sinaimg.cn/1241679004/180/5743814375/0","sign":"在自己实力不济的时候，不要去相信什么媒体和记者。他们不是善良的人，有时候候他们的采访对当事人而言就是陷阱"},{"username":"长泽梓Azusa","id":"100001222","sign":"我是日本女艺人长泽あずさ","avatar":"http://tva1.sinaimg.cn/crop.0.0.180.180.180/86b15b6cjw1e8qgp5bmzyj2050050aa8.jpg"},{"username":"大鱼_MsYuyu","id":"12123454","avatar":"http://tp1.sinaimg.cn/5286730964/50/5745125631/0","sign":"我瘋了！這也太準了吧  超級笑點低"},{"username":"谢楠","id":"10034001","avatar":"http://tp4.sinaimg.cn/1665074831/180/5617130952/0","sign":""},{"username":"柏雪近在它香","id":"3435343","avatar":"http://tp2.sinaimg.cn/2518326245/180/5636099025/0","sign":""}]},{"groupname":"我心中的女神","id":3,"online":1,"list":[{"username":"林心如","id":"76543","avatar":"http://tp3.sinaimg.cn/1223762662/180/5741707953/0","sign":"我爱贤心"},{"username":"佟丽娅","id":"4803920","avatar":"http://tp4.sinaimg.cn/1345566427/180/5730976522/0","sign":"我也爱贤心吖吖啊"}]}],"group":[{"groupname":"前端群","id":"101","avatar":"http://tp2.sinaimg.cn/2211874245/180/40050524279/0"},{"groupname":"Fly社区官方群","id":"102","avatar":"http://tp2.sinaimg.cn/5488749285/50/5719808192/1"}]}}";
            var result = JsonConvert.DeserializeObject(str);
            //List<string> dic = ChatHub.GetOnlineUserIds();

            return Json(result);
        }