.net core 3.1 SqlSugar

话不多说，稍微研究过.net core 下 orm框架的都应该知道SqlSugar，它的好谁用谁知道！！！

1、NuGet 

SqlSugarCore

  2、撸代码

官网：http://www.donet5.com/home/Doc?typeId=1180

因为是中国大哥码的，所以教程一看就会，批量、事务啥的都支持，而且lamdba表达式生成的sql语句让你爱的不行，你用过EF的话，再看看这个你就明白了。没啥教程可出，官网都有。

public void SqlSugarCreate()
{
    try
    {
        db.DbFirst.Where(e => !e.Contains("20") && !e.Contains("删除")).CreateClassFile(@"C:Visual Studio 2019Y.MVCY.MVC.EntityLTT", "Y.MVC.Entity.LTT");
    }
    catch (Exception ex)
    {
    }
}

public void SqlSugarQuery()
{
    try
    {
        System.Diagnostics.Stopwatch stopwatch = new System.Diagnostics.Stopwatch();
        stopwatch.Start();

        ////00:00:04.5984872
        //var getAll2 = db.Queryable<UserInfo, FreightNew>((e, ee) => e.UserName == ee.UserName)
        //    .Select((e, ee) => new { e.ComName, e.Id, ee }).ToDataTable();
        //WriteLine_("数据查询结束，getAll2，行数：" + getAll2.Rows.Count / 10000 + "w，列数：" + getAll2.Columns.Count + "，时间：" + stopwatch.Elapsed);
        //stopwatch.Restart();

        ////00:00:04.2030018
        //var getAll3 = db.Queryable<UserInfo, FreightNew>((e, ee) => new object[] { JoinType.Left, e.UserName == ee.UserName })
        //    .Select((e, ee) => new { e.ComName, e.Id, ee }).ToDataTable();
        //WriteLine_("数据查询结束，getAll3，行数：" + getAll3.Rows.Count / 10000 + "w，列数：" + getAll3.Columns.Count + "，时间：" + stopwatch.Elapsed);
        //stopwatch.Restart();

        ////00:00:05.2426471
        //var getAll4 = db.Queryable<UserInfo, FreightNew, FreightDetail>((e, ee, eee) => new object[] { JoinType.Left, e.UserName == ee.UserName, JoinType.Left, ee.Id == eee.FreightId })
        //    .Select((e) => new { e }).ToDataTable();
        //WriteLine_("数据查询结束，getAll4，行数：" + getAll4.Rows.Count / 10000 + "w，列数：" + getAll4.Columns.Count + "，时间：" + stopwatch.Elapsed);
        //stopwatch.Restart();

        ////实在是太TM慢了！不能用！
        ////var getAll5 = db.Queryable<UserInfo, FreightNew, FreightDetail>((e, ee, eee) => new object[] { JoinType.Left, e.UserName == ee.UserName, JoinType.Left, ee.Id == eee.FreightId })
        ////.Select((e, ee, eee) => new { e, ee, eee }).ToList();
        ////string c4 = stopwatch.Elapsed.ToString();
        ////stopwatch.Restart();
        ////Console.WriteLine(c4);

        ////00:00:03.8124100
        //List<FreightNew> getAll6 = db.Queryable<UserInfo, FreightNew, FreightDetail>((e, ee, eee) => new object[] { JoinType.Left, e.UserName == ee.UserName, JoinType.Left, ee.Id == eee.FreightId })
        //    .Select<FreightNew>().ToList();
        //WriteLine_("数据查询结束，getAll6，行数：" + getAll6.Count / 10000 + "w，列数：" + typeof(UserInfo).GetPropertyCount() + "，时间：" + stopwatch.Elapsed);
        //stopwatch.Restart();

        //00:00:02.7548608
        //SqlSugar封装分页（原理：ROW_NUMBER）
        int total = 0;
        List<FreightNew> getAll7 = db.Queryable<UserInfo, FreightNew, FreightDetail>((e, ee, eee) => new object[] { JoinType.Left, e.UserName == ee.UserName, JoinType.Left, ee.Id == eee.FreightId })
            .Where(e => e.IsDelete != 1)
            .Select<FreightNew>().ToPageList(1, 20, ref total);
        WriteLine_("数据查询结束（SqlSugar封装方法分页），getAll7，行数：" + total / 10000 + "w，列数：" + typeof(UserInfo).GetPropertyCount() + "，时间：" + stopwatch.Elapsed);
        stopwatch.Restart();

        //00:00:01.9567370
        //sql2012语句分页（速度更快，推荐！）
        List<SugarParameter> p8 = new List<SugarParameter>() { new SugarParameter("@IsDelete", 1) };
        string sqlStr8 = "SELECT A.* FROM  [dbo].[UserInfo]B LEFT JOIN [dbo].[FreightNew]A  ON A.UserName=B.UserName LEFT JOIN [dbo].[FreightDetail] C ON A.Id=C.FreightId";
        sqlStr8 = sqlStr8 + " WHERE B.IsDelete != @IsDelete ORDER BY A.Id DESC OFFSET 10 ROW FETCH NEXT 20 ROWS ONLY;";
        sqlStr8 = sqlStr8 + " SELECT COUNT(1) FROM  [dbo].[UserInfo]B LEFT JOIN [dbo].[FreightNew]A  ON A.UserName=B.UserName LEFT JOIN [dbo].[FreightDetail] C ON A.Id=C.FreightId  WHERE B.IsDelete != @IsDelete";
        Tuple<List<FreightNew>, List<int>> getAll8 = db.Ado.SqlQuery<FreightNew, int>(sqlStr8, p8);
        WriteLine_("数据查询结束（sql2012语句分页），getAll7，行数：" + getAll8.Item2[0].ObjToInt() / 10000 + "w，列数：" + typeof(UserInfo).GetPropertyCount() + "，时间：" + stopwatch.Elapsed);
        stopwatch.Restart();
    }
    catch (Exception ex)
    {

    }
}

public void SqlSugarUpdate()
{
    try
    {
        System.Diagnostics.Stopwatch stopwatch = new System.Diagnostics.Stopwatch();
        stopwatch.Start();

        //00:00:00.0668580
        //var userInfo = db.Queryable<UserInfo>().First(it=>it.Id==1);//查询单条
        UserInfo userInfo = db.Queryable<UserInfo>().Where(e => e.Id == 1611).First();//1行
        userInfo.Password = "77";
        Console.WriteLine("----------------------------------");
        var affectedRows = db.Updateable(userInfo).ExecuteCommand();
        WriteLine_("SqlSugarUpdate，影响行数：" + affectedRows + "，时间：" + stopwatch.Elapsed);
        stopwatch.Restart();

        ////00:00:05.8772444
        //List<UserInfo> list2 = db.Queryable<UserInfo>().Where(e => e.IsDelete != 1).ToList();//538行
        //list2.ForEach((e) => e.WeChart = e.WeChart + "_A");
        //affectedRows = db.Updateable(list2).ExecuteCommand();
        //WriteLine_("SqlSugarUpdate，影响行数：" + affectedRows + "，时间：" + stopwatch.Elapsed);
        //stopwatch.Restart();

        ////00:00:00.2279162 这种方式修改，修改了UserInfo的每一个属性值
        //List<UserInfo> list3 = db.Queryable<UserInfo>().Where(e => e.IsDelete != 1).Take(10).ToList();//10行
        //list3.ForEach((e) => e.WeChart = e.WeChart + "_3");
        //affectedRows = db.Updateable(list3).ExecuteCommand();
        //WriteLine_("SqlSugarUpdate，影响行数：" + affectedRows + "，时间：" + stopwatch.Elapsed);
        //stopwatch.Restart();

        //00:00:01.8330901 
        //List<UserInfo> list5 = db.Queryable<UserInfo>().Where(e => e.IsDelete != 1).ToList();//538行
        //list5.ForEach((e) => e.WeChart = e.WeChart + "_5");
        //Console.WriteLine("----------------------------------");
        //int affectedRows = db.Updateable(list5).UpdateColumns(it => new { it.WeChart }).ExecuteCommand();
        //WriteLine_("SqlSugarUpdate，影响行数：" + affectedRows + "，时间：" + stopwatch.Elapsed);
        //stopwatch.Restart();

        //00:00:00.0273948 推荐！指定修改列
        UserInfo userInfo6 = db.Queryable<UserInfo>().First(e => e.Id == 1611);
        userInfo6.WeChart = userInfo6.WeChart + "_6";
        affectedRows = db.Updateable(userInfo6).UpdateColumns(it => new { it.WeChart }).ExecuteCommand();
        WriteLine_("SqlSugarUpdate，影响行数：" + affectedRows + "，时间：" + stopwatch.Elapsed);
        stopwatch.Restart();

    }
    catch (Exception ex)
    {

    }
}

public void SqlSugarTran()
{
    try
    {
        db.Ado.BeginTran();

        db.Ado.CommitTran();
    }
    catch (Exception)
    {
        db.Ado.RollbackTran();
        throw;
    }
}