سلام
اینم کد های شما
System.Globalization.PersianCalendar pc = new System.Globalization.PersianCalendar();
System.Globalization.HijriCalendar hc = new System.Globalization.HijriCalendar();
string date1;
DateTime datetime = new DateTime();
//تبدیل تاریخ میلادی به شمسی و قمری
if (comboBox1.Text != "" & comboBox1.Text != "" & comboBox1.Text != "" & radioButton3.Checked)
{
date1 = comboBox3.Text + "/" + comboBox2.Text + "/" + comboBox1.Text;
DateTime dt = DateTime.Parse(date1);
label1.Text = pc.GetYear(dt) + "/" + pc.GetMonth(dt) + "/" + pc.GetDayOfMonth(dt);
label9.Text = hc.GetYear(dt) + "/" + hc.GetMonth(dt) + "/" + hc.GetDayOfMonth(dt);
label10.Text = dt.Year + "/" + dt.Month + "/" + dt.Day;
}
//تبدیل تاریخ شمسی به میلادی و قمری
if (comboBox1.Text != "" & comboBox1.Text != "" & comboBox1.Text != "" & radioButton1.Checked)
{
date1 = comboBox3.Text + "/" + comboBox2.Text + "/" + comboBox1.Text;
DateTime dt1 = pc.ToDateTime(int.Parse(comboBox3.Text), int.Parse(comboBox2.Text), int.Parse(comboBox1.Text), 0, 0, 0, 0);
label1.Text = date1;
label9.Text = hc.GetYear(dt1) + "/" + hc.GetMonth(dt1) + "/" + hc.GetDayOfMonth(dt1);
label10.Text = dt1.Year + "/" + dt1.Month + "/" + dt1.Day;
}
//
//تبدیل تاریخ قمری به شمسی و میلادی
if (comboBox1.Text != "" & comboBox1.Text != "" & comboBox1.Text != "" & radioButton2.Checked)
{
date1 = comboBox3.Text + "/" + comboBox2.Text + "/" + comboBox1.Text;
DateTime dt2 = hc.ToDateTime(int.Parse(comboBox3.Text), int.Parse(comboBox2.Text), int.Parse(comboBox1.Text), 0, 0, 0, 0);
label1.Text = pc.GetYear(dt2) + "/" + pc.GetMonth(dt2) + "/" + pc.GetDayOfMonth(dt2);
label9.Text = date1;
label10.Text = dt2.Year + "/" + dt2.Month + "/" + dt2.Day;
}
private void Form1_Load(object sender, EventArgs e)
{
radioButton1.Checked = true;
datetime = DateTime.Now;
label16.Text = datetime.Year + " / " + datetime.Month + " / " + datetime.Day;
label17.Text = hc.GetYear(datetime) + " / " + hc.GetMonth(datetime) + " / " + hc.GetDayOfMonth(datetime);
label18.Text = pc.GetYear(datetime) + " / " + pc.GetMonth(datetime) + " / " + pc.GetDayOfMonth(datetime);
}