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Dapper Beginner to advanced
7 videos
Series containing videos related to `dapper beginners` and `dapper advanced` topics like mapping multiple objects in dapper, bulk insert with table valued type, multiple results in dapper and transaction in dapper. 

In this beginner level course, you will learn the foundational elements of a microservices architecture by incrementally building a real microservices based application with the .NET platform, step by step. 

using System;
using System.Data.SqlTypes;
using Microsoft.SqlServer.Server;

[Serializable()]
[SqlUserDefinedType(Format.Native)]
public struct JalaliDate : INullable
{
    private Int16 m_Year;
    private byte m_Month;
    private byte m_Day;
    private byte m_Hour;
    private byte m_Minute;
    private byte m_Second;
    private bool is_Null;


    public Int16 Year
    {
        get
        {
            return (this.m_Year);
        }
        set
        {
            m_Year = value;
        }
    }

    public byte Month
    {
        get
        {
            return (this.m_Month);
        }
        set
        {
            m_Month = value;
        }
    }

    public byte Day
    {
        get
        {
            return (this.m_Day);
        }
        set
        {
            m_Day = value;
        }
    }

    public byte Hour
    {
        get
        {
            return (this.m_Hour);
        }
        set
        {
            m_Hour = value;
        }
    }

    public byte Minute
    {
        get
        {
            return (this.m_Minute);
        }
        set
        {
            m_Minute = value;
        }
    }

    public byte Second
    {
        get
        {
            return (this.m_Second);
        }
        set
        {
            m_Second = value;
        }
    }

    public bool IsNull
    {
        get
        {
            return is_Null;
        }
    }

    public static JalaliDate Null
    {
        get
        {
            JalaliDate jl = new JalaliDate();
            jl.is_Null = true;
            return (jl);
        }
    }


    public override string ToString()
    {
        if (this.IsNull)
        {
            return "NULL";
        }
        else
        {
            return this.m_Year.ToString("D4") + "/" + this.m_Month.ToString("D2") + "/" + this.m_Day.ToString("D2") + " " + this.Hour.ToString("D2") + ":" + this.Minute.ToString("D2") + ":" + this.Second.ToString("D2");
        }
    }


    public static JalaliDate Parse(SqlString s)
    {
        if (s.IsNull)
        {
            return Null;
        }

        System.Globalization.PersianCalendar pers = new System.Globalization.PersianCalendar();
        string str = Convert.ToString(s);
        string[] JDate = str.Split(' ')[0].Split('/');

        JalaliDate jl = new JalaliDate();

        jl.Year = Convert.ToInt16(JDate[0]);
        byte MonthsInYear = (byte)pers.GetMonthsInYear(jl.Year);
        jl.Month = (byte.Parse(JDate[1]) <= MonthsInYear ? (byte.Parse(JDate[1]) > 0 ? byte.Parse(JDate[1]) : (byte)1) : MonthsInYear);
        byte DaysInMonth = (byte)pers.GetDaysInMonth(jl.Year, jl.Month); ;
        jl.Day = (byte.Parse(JDate[2]) <= DaysInMonth ? (byte.Parse(JDate[2]) > 0 ? byte.Parse(JDate[2]) : (byte)1) : DaysInMonth);
        if (str.Split(' ').Length > 1)
        {
            string[] JTime = str.Split(' ')[1].Split(':');
            jl.Hour = (JTime.Length >= 1 ? (byte.Parse(JTime[0]) < 23 && byte.Parse(JTime[0]) >= (byte)0 ? byte.Parse(JTime[0]) : (byte)0) : (byte)0);
            jl.Minute = (JTime.Length >= 2 ? (byte.Parse(JTime[1]) < 59 && byte.Parse(JTime[1]) >= (byte)0 ? byte.Parse(JTime[1]) : (byte)0) : (byte)0);
            jl.Second = (JTime.Length >= 3 ? (byte.Parse(JTime[2]) < 59 && byte.Parse(JTime[2]) >= (byte)0 ? byte.Parse(JTime[2]) : (byte)0) : (byte)0);
        }
        else { jl.Hour = 0; jl.Minute = 0; jl.Second = 0; }

        return (jl);
    }

    public SqlString GetDate()
    {
        return this.m_Year.ToString("D4") + "/" + this.m_Month.ToString("D2") + "/" + this.m_Day.ToString("D2");
    }

    public SqlString GetTime()
    {
        return this.Hour.ToString("D2") + ":" + this.Minute.ToString("D2") + ":" + this.Second.ToString("D2");
    }

    public SqlDateTime ToGregorianTime()
    {
        System.Globalization.PersianCalendar pers = new System.Globalization.PersianCalendar();
        return SqlDateTime.Parse(pers.ToDateTime(this.Year, this.Month, this.Day, this.Hour, this.Minute, this.Second, 0).ToString());
    }

    public SqlString JalaliDateAdd(SqlString interval, int increment)
    {
        System.Globalization.PersianCalendar pers = new System.Globalization.PersianCalendar();
        DateTime dt = pers.ToDateTime(this.Year, this.Month, this.Day, this.Hour, this.Minute, this.Second, 0);
        string CInterval = interval.ToString();
        bool isConvert = true;
        switch (CInterval)
        {
            case "Year":
                dt = pers.AddYears(dt, increment);
                break;
            case "Month":
                dt = pers.AddMonths(dt, increment);
                break;
            case "Day":
                dt = pers.AddDays(dt, increment);
                break;
            case "Hour":
                dt = pers.AddHours(dt, increment);
                break;
            case "Minute":
                dt = pers.AddMinutes(dt, increment);
                break;
            case "Second":
                dt = pers.AddSeconds(dt, increment);
                break;
            default:
                isConvert = false;
                break;
        }

        if (isConvert == true)
        {
            this.Year = (Int16)pers.GetYear(dt);
            this.Month = (byte)pers.GetMonth(dt);
            this.Day = (byte)pers.GetDayOfMonth(dt);
            this.Hour = (byte)pers.GetHour(dt);
            this.Minute = (byte)pers.GetMinute(dt);
            this.Second = (byte)pers.GetSecond(dt);
        }


        return this.m_Year.ToString("D4") + "/" + this.m_Month.ToString("D2") + "/" + this.m_Day.ToString("D2") + " " + this.Hour.ToString("D2") + ":" + this.Minute.ToString("D2") + ":" + this.Second.ToString("D2");
    }
}

USE Northwind

GO

CREATE TABLE dbo.TestTable
(
Id int NOT NULL IDENTITY (1, 1),
TestDate dbo.JalaliDate NULL
)  ON [PRIMARY]
GO

Insert into TestTable (TestDate) Values ('1392/02/09'),('1392/02/09 22:40'),('1392/12/30 22:40')

sp_configure 'clr enabled', 1
Reconfigure

Insert into TestTable (TestDate) Values ('1392/02/09'),('1392/02/09 22:40'),('1392/12/30 22:40')

Declare @a JalaliDate  = '1392/02/07 00:00:00'
Declare @b JalaliDate = '1392/02/05 00:00:00'

SELECT DATEDIFF("DAY",@b.ToGregorianTime(),@a.ToGregorianTime()) AS DiffDate

A high-performance second-level query cache for EF Core.  Nuget Package

Using Example 

dbContext.Books
   .Include(d => d.Pages).ThenInclude(d => d.Lines).Where(d => d.ID == 200)
   .Cacheable(TimeSpan.FromSeconds(60))

Performance Test  

Cacheable vs DataBase

Average database query duration [+00:00:00.0026076].
Average cache query duration [+00:00:00.0000411].
Cached queries are x63 times faster. 

Cacheable vs In-Memory

Average database query duration [+00:00:00.1698972].
Average cache query duration [+00:00:00.0000650].
Cached queries are x2,611 times faster. 

This course is an introduction to analyzing data with the R software.