C # Conversion between date and string __c#

1. Date-turn string (reproduced)

In programming, it is often used to convert a date variable to a string, and a string that you want to convert to a different format at different times.
Here are some common conversion and conversion results: (View format description)

Take the date as an example: 2009-09-06 10:56:13.383

private void Form1_Load (object sender, System.EventArgs e)
{
Textbox1.text=datetime.now.tostring ("D"); 2009-09-06
Textbox2.text=datetime.now.tostring ("D"); September 06, 2009
Textbox3.text=datetime.now.tostring ("G"); 2009-09-06 10:56:13
Textbox6.text=datetime.now.tostring ("G"); 2009-09-06 10:56
Textbox5.text=datetime.now.tostring ("T"); 10:56:13
Textbox4.text=datetime.now.tostring ("T"); 10:56

Textbox12.text=datetime.now.tostring ("F"); September 06, 2009 10:56:13
Textbox11.text=datetime.now.tostring ("F"); September 06, 2009 10:56
Textbox10.text=datetime.now.tostring ("M"); September 06
Textbox9.text=datetime.now.tostring ("R"); Sun, SEP 2009 10:56
Textbox8.text=datetime.now.tostring ("s"); 2009-09-06t10:56:13
Textbox7.text=datetime.now.tostring ("U"); 2009-09-06 10:56:13z

Textbox13.text=datetime.now.tostring ("Y"); September 2009
Textbox14.text=datetime.now.tostring ("Y"); September 2009
}

Effect comparison:

The following is the result of another method conversion:
      
private void Form2_load (object sender, System.EventArgs e)
{
   textbox1.text=datetime.now.tostring ("m/d/yyyy");              //09-06-2009
   textbox2.text= DateTime.Now.ToString ("Mm/dd/yy");            // 09-06-09
   textbox3.text=datetime.now.tostring ("D-mmmm-yy");          //06-3 month -09
   textbox6.text=datetime.now.tostring ("ddmmyyyy");            //060909
   textbox5.text=datetime.now.tostring (" DD Day mm month yyyy year ");  //06 Day September 2009
   textbox4.text=datetime.now.tostring (" YYYY year mm month DD Day ");   //September 06, 2009

Textbox12.text=datetime.now.tostring ("yyyy year"); 2009
Textbox11.text=datetime.now.tostring ("mm month"); September
Textbox10.text=datetime.now.tostring ("DD Day"); 06th
Textbox9.text=datetime.now.tostring ("Hh:mm:ss"); 10:56:13
Textbox8.text=datetime.now.tostring ("m/d/yyyy h:mm"); 09/06/2009 10:56
Textbox7.text=datetime.now.tostring ("H:mm:ss"); 10:56:13
}

2. String Turn date (original)

A. Method One:convert.todatetime (String)

Convert.todatetime ("10-03-20"); 2010-3-20 0:00:00

B. Method Two:datetime.parse (String)

DateTime.Parse ("10-03-20"); 2010-3-20 0:00:00

C. Method III:datetime.parseexact (string,string date format, null) This function can customize the date conversion format

DateTime.ParseExact ("March 20, 2010 15:14 56 Seconds", "yyyy mm month DD Day hh point mm minute ss seconds", NULL); 2010-3-20 15:14:56

DateTime.ParseExact ("2010-03-20" "", "YYYY-MM-DD", null); 2010-3-20 0:00:00

3. Appendix Format type Description

Format Character Association attribute/description
D ShortDatePattern
D Longdatepattern
F Full Date and time (long date and short time)
F Fulldatetimepattern (long date and long time)
G General (short date and short time)
G General (short date and long time)
M, M Monthdaypattern
R, R Rfc1123pattern
s use local time Sortabledatetimepattern (based on ISO 8601)
T Shorttimepattern
T Longtimepattern
U universalsortabledatetimepattern format for displaying Universal Time
U use the full date and time of the universal Time (long date and long time)
Y, y Yearmonthpattern

Hope, useful to everyone.