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TUTORIAL

# How to: Convert Miladi to Shamsi in C#

By Naser Gharachi on Aug 14, 2007

How to convert Miladi to Shamsi in C#:

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Text;

using System.Windows.Forms;

namespace WindowsApplication2

{

public partial class Form1 : Form

{

public Form1()

{

InitializeComponent();

}

private void Form1_Load(object sender, EventArgs e)

{

//********* Test ************

MessageBox.Show(Shamsi(2005, 8, 14).ToShortDateString());

MessageBox.Show(todayShamsi().ToShortDateString());

}

private DateTime todayShamsi()

{

DateTime today;

today = DateTime.Today;

string year = today.Year.ToString();

string month = today.Month.ToString();

string day = today.Day.ToString();

int Y = int.Parse(year);

int M = int.Parse(month);

int D = int.Parse(day);

return Shamsi(Y, M, D);

}

private DateTime Shamsi(int Y, int M, int D)

{

if (Y == 0)

Y = 2000;

if (Y < 100)

Y = Y + 1900;

if (Y == 2000)

{

if (M > 2)

{

DateTime Temp = new DateTime(Y, M, D);

Y = int.Parse(Temp.Year.ToString());

M = int.Parse(Temp.Month.ToString());

D = int.Parse(Temp.Day.ToString());

}

}

if (M < 3 || (M == 3 && D < 21))

Y = Y - 622;

else Y = Y - 621;

switch (M)

{

case 1: if (D < 21)

{

M = 10;

D = D + 10;

}

else

{

M = 11;

D = D - 20;

}

break;

case 2: if (D < 20)

{

M = 11;

D = D + 11;

}

else

{

M = 12;

D = D - 19;

}

break;

case 3:

if (D < 21)

{

M = 12;

D = D + 9;

}

else

{

M = 1;

D = D - 20;

}

break;

case 4:

if (D < 21)

{

M = 1;

D = D + 11;

}

else

{

M = 2; D = D - 20;

}

break;

case 5:

if (D < 22)

{

M = M - 3;

D = D + 10;

}

else

{

M = M - 2;

D = D - 21;

}

break;

case 6:

if (D < 22)

{

M = M - 3;

D = D + 10;

}

else

{

M = M - 2;

D = D - 21;

}

break;

case 7:

if (D < 23)

{

M = M - 3;

D = D + 9;

}

else

{

M = M - 2;

D = D - 22;

}

break;

case 8:

if (D < 23)

{

M = M - 3;

D = D + 9;

}

else

{

M = M - 2;

D = D - 22;

}

break;

case 9:

if (D < 23)

{

M = M - 3;

D = D + 9;

}

else

{

M = M - 2;

D = D - 22;

}

break;

case 10:

if (D < 23)

{

M = 7;

D = D + 8;

}

else

{

M = 8;

D = D - 22;

}

break;

case 11:

if (D < 22)

{

M = M - 3;

D = D + 9;

}

else

{

M = M - 2;

D = D - 21;

}

break;

case 12:

if (D < 22)

{

M = M - 3;

D = D + 9;

}

else

{

M = M - 2;

D = D - 21;

}

break;

}

DateTime Temp1 = new DateTime(Y, M, D);

return Temp1;

}

}

}

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