DateTime.Now.ToString () Usage

April 24, 2008 System.DateTime.Now.ToString ("D");     2008-4-24 System.DateTime.Now.ToString ("D");     April 24, 2008 16:30:15 System.DateTime.Now.ToString ("F");     April 24, 2008 16:30 System.DateTime.Now.ToString ("F");     2008-4-24 16:30:15 System.DateTime.Now.ToString ("G");     2008-4-24 16:30 System.DateTime.Now.ToString ("G");     16:30:15 System.DateTime.Now.ToString ("T");     16:30 System.DateTime.Now.ToString ("T");     April 24, 2008 8:30:15 System.DateTime.Now.ToString ("U");     2008-04-24 16:30:15z System.DateTime.Now.ToString ("U");     April 24 System.DateTime.Now.ToString ("M");     System.DateTime.Now.ToString ("M");     Tue, APR 16:30:15 GMT System.DateTime.Now.ToString ("R");     System.DateTime.Now.ToString ("R");     April 2008 System.DateTime.Now.ToString ("Y");     System.DateTime.Now.ToString ("Y");     2008-04-24t15:52:19.1562500+08:00 System.DateTime.Now.ToString ("O"); System.DateTime.Now.ToString("O");     2008-04-24t16:30:15 System.DateTime.Now.ToString ("s");     2008-04-24 15:52:19 System.DateTime.Now.ToString ("Yyyy-mm-dd HH:mm:ss:ffff");     April 2008 24 15:56 48 seconds System.DateTime.Now.ToString ("yyyy mm month dd hh when mm min ss seconds");     Tuesday, April System.DateTime.Now.ToString ("dddd, MMMM dd yyyy");     II, April ' System.DateTime.Now.ToString ("ddd, MMM d \" ' \ "yy");     Tuesday, April System.DateTime.Now.ToString ("dddd, MMMM dd");     4-08 System.DateTime.Now.ToString ("M/yy");    24-04-08 System.DateTime.Now.ToString ("Dd-mm-yy");  Character conversion to string 12345.ToString ("n"); Generate 12,345.00 12345.ToString ("C"); Generate ￥12,345.00 12345.ToString ("E"); Generate 1.234500e+004 12345.ToString ("F4"); Generate 12345.0000 12345.ToString ("x"); Generate 3039 (16 binary) 12345.ToString ("P");     Generate 1,234,500//year sales, this quarter profit, new customers this month//Today DateTime.Now.Date.ToShortDateString (); Yesterday, it was today's date minus one DateTime.Now.AddDays (-1).     ToShortDateString (); Tomorrow, in the same vein, add a     DateTime.Now.AddDays (1).     ToShortDateString (); This week (knowing that the first day of the week is the day of the week and that the first day of the week is a few days ago, it is important to note that every week here is from Sunday to Saturday DateTime.Now.AddDays (convert.todouble (0- Convert.ToInt16 (DateTime.Now.DayOfWeek))).     ToShortDateString (); DateTime.Now.AddDays (Convert.todouble (6-convert.toint16 (DateTime.Now.DayOfWeek))).     ToShortDateString ();                  If you do not understand, then look at the Chinese display of the day of the method should understand//because the DayOfWeek return is the number of days of the week, we want to convert it into Chinese characters to facilitate our reading, some people may use switch to a control, in fact, not so troublesome     string[] Day = new string[]{"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"};     Day[convert.toint16 (DateTime.Now.DayOfWeek)]; Last week, the same thing, a week is 7 days, last week is this week minus 7 days, next week is the same DateTime.Now.AddDays (Convert.todouble (0-convert.toint16 ( DateTime.Now.DayOfWeek)))-7).     ToShortDateString (); DateTime.Now.AddDays (Convert.todouble (6-convert.toint16 (DateTime.Now.DayOfWeek))-7).     ToShortDateString (); Next week DateTime.Now.AddDays (Convert.todouble ((0-convert.toint16 (DateTime.Now.DayOfWeek)) + 7).     ToShortDateString (); DatETime.Now.AddDays (Convert.todouble ((6-convert.toint16 (DateTime.Now.DayOfWeek)) + 7).     ToShortDateString (); This month, many people will say that the first day of this month is definitely number 1th, and the last day is the next month minus another day. Of course, this is the right//general wording DateTime.Now.Year.ToString () + DateTime.Now.Month.ToString () + "1"; First day DateTime.Parse (DateTime.Now.Year.ToString () + DateTime.Now.Month.ToString () + "1"). AddMonths (1). AddDays (-1).     ToShortDateString ();//The Last day//skillfully using the C # ToString character formatting more convenient DateTime.Now.ToString ("yyyy-mm-01"); DateTime.Parse (DateTime.Now.ToString ("yyyy-mm-01")). AddMonths (1). AddDays (-1).     ToShortDateString (); Last month, subtract one month datetime.parse (DateTime.Now.ToString ("yyyy-mm-01")). AddMonths (-1).     ToShortDateString (); DateTime.Parse (DateTime.Now.ToString ("yyyy-mm-01")). AddDays (-1).     ToShortDateString (); Next month, add a month datetime.parse (DateTime.Now.ToString ("yyyy-mm-01")). AddMonths (1).     ToShortDateString (); DateTime.Parse (DateTime.Now.ToString ("yyyy-mm-01")). AddMonths (2). AddDays (-1).     ToShortDateString (); 7 days after DateTime.Now.Date.ToShortdatestring (); DateTime.Now.AddDays (7).     ToShortDateString (); 7 days ago DateTime.Now.AddDays (-7).     ToShortDateString ();     DateTime.Now.Date.ToShortDateString (); This year, formatting with ToString's characters makes it easy to figure out the first and last day of the year DateTime.Parse (DateTime.Now.ToString ("yyyy-01-01")).     ToShortDateString (); DateTime.Parse (DateTime.Now.ToString ("yyyy-01-01")). AddYears (1). AddDays (-1).     ToShortDateString (); Last year, no more explaining it DateTime.Parse (DateTime.Now.ToString ("yyyy-01-01")). AddYears (-1).     ToShortDateString (); DateTime.Parse (DateTime.Now.ToString ("yyyy-01-01")). AddDays (-1).     ToShortDateString (); Next year DateTime.Parse (DateTime.Now.ToString ("yyyy-01-01")). AddYears (1).     ToShortDateString (); DateTime.Parse (DateTime.Now.ToString ("yyyy-01-01")). AddYears (2). AddDays (-1).     ToShortDateString (); This quarter, many people will feel the difficulty here, need to write a long process to judge. In fact, we all know that four quarters a year, a quarter of three months//first we push the date to the first month of the quarter, and then the first day of the month is the first day of the quarter. DateTime.Now.AddMonths (0-(DateTime.Now.Month -1)% 22)).     ToString ("yyyy-mm-01"); In the same vein, this quarter's mostThe following day is the first day of the next quarter minus one datetime.parse (DateTime.Now.AddMonths (((datetime.now.month-1)% 22)). ToString ("yyyy-mm-01")). AddDays (-1).     ToShortDateString (); Next quarter, I believe you all know .... DateTime.Now.AddMonths (((datetime.now.month-1)% 22)).     ToString ("yyyy-mm-01"); DateTime.Parse (DateTime.Now.AddMonths (6-((datetime.now.month-1)% 22)). ToString ("yyyy-mm-01")). AddDays (-1).     ToShortDateString (); Last quarter DateTime.Now.AddMonths ( -22-((datetime.now.month-1)% 22)).     ToString ("yyyy-mm-01"); DateTime.Parse (DateTime.Now.AddMonths (0-((datetime.now.month-1)% 22)). ToString ("yyyy-mm-01")). AddDays (-1). ToShortDateString ();

//2007年4月24日

  this .TextBox1.Text = System.DateTime.Now.ToString( "D" );   //2007/4/24   this .TextBox2.Text = System.DateTime.Now.ToString( "d" );   //2007年4月24日 16:30:15   this .TextBox3.Text = System.DateTime.Now.ToString( "F" );   //2007年4月24日 16:30   this .TextBox4.Text = System.DateTime.Now.ToString( "f" );   //2007/4/24 16:30:15   this .TextBox5.Text = System.DateTime.Now.ToString( "G" );   //2007/4/24 16:30        this .TextBox6.Text = System.DateTime.Now.ToString( "g" );   //16:30:15   this .TextBox7.Text = System.DateTime.Now.ToString( "T" );   //16:30   this .TextBox8.Text = System.DateTime.Now.ToString( "t" );   //2007年4月24日 8:30:15   this .TextBox9.Text = System.DateTime.Now.ToString( "U" );   //2007-04-24 16:30:15Z   this .TextBox10.Text = System.DateTime.Now.ToString( "u" );   //4月24日      this .TextBox11.Text = System.DateTime.Now.ToString( "m" );   this .TextBox12.Text = System.DateTime.Now.ToString( "M" );   //Tue, 24 Apr 2007 16:30:15 GMT    this .TextBox13.Text = System.DateTime.Now.ToString( "r" );   this .TextBox14.Text = System.DateTime.Now.ToString( "R" );   //2007年4月   this .TextBox15.Text = System.DateTime.Now.ToString( "y" );   this .TextBox16.Text = System.DateTime.Now.ToString( "Y" );   //2007-04-24T15:52:19.1562500+08:00   this .TextBox17.Text = System.DateTime.Now.ToString( "o" );   this .TextBox18.Text = System.DateTime.Now.ToString( "O" );   //2007-04-24T16:30:15   this .TextBox19.Text = System.DateTime.Now.ToString( "s" );   //2007-04-24 15:52:19:9889   this .TextBox20.Text = System.DateTime.Now.ToString( "yyyy-MM-dd HH：mm：ss：ffff" );   //2007年04月24 15时56分48秒   this .TextBox21.Text = System.DateTime.Now.ToString( "yyyy年MM月dd HH时mm分ss秒" );   //星期二, 四月 24 2007   this .TextBox22.Text = System.DateTime.Now.ToString( "dddd, MMMM dd yyyy" );   //周三, 十二月 7 ‘11   this .TextBox23.Text = System.DateTime.Now.ToString( "ddd, MMM d \"‘\"yy" );   //星期二, 四月 24   this .TextBox24.Text = System.DateTime.Now.ToString( "dddd, MMMM dd" );   //4/07   this .TextBox25.Text = System.DateTime.Now.ToString( "M/yy" );   //07-12-11   this .TextBox26.Text = System.DateTime.Now.ToString( "dd-MM-yy" );   string [] Day = new string [] { "星期日" , "星期一" , "星期二" , "星期三" , "星期四" , "星期五" , "星期六" };   //2011/12/6 昨天   this .TextBox1.Text = System.DateTime.Now.AddDays(-1).ToShortDateString();   //2011/12/8 明天   this .TextBox2.Text = DateTime.Now.AddDays(1).ToShortDateString();   //2011/12/4 本周星期天   this .TextBox3.Text = DateTime.Now.AddDays(Convert.ToDouble((0 - Convert.ToInt16(DateTime.Now.DayOfWeek)))).ToShortDateString();   //2011/12/10 本周星期六   this .TextBox4.Text = DateTime.Now.AddDays(Convert.ToDouble((6 - Convert.ToInt16(DateTime.Now.DayOfWeek)))).ToShortDateString();   //星期三 今天周几   this .TextBox5.Text = Day[Convert.ToInt16(DateTime.Now.DayOfWeek)];   //2011/11/27 上周日   this .TextBox6.Text = DateTime.Now.AddDays(Convert.ToDouble((0 - Convert.ToInt16(DateTime.Now.DayOfWeek))) - 7).ToShortDateString();   //2011/12/3 上周六   this .TextBox7.Text = DateTime.Now.AddDays(Convert.ToDouble((6 - Convert.ToInt16(DateTime.Now.DayOfWeek))) - 7).ToShortDateString();   //2011/12/11 下周日   this .TextBox8.Text = DateTime.Now.AddDays(Convert.ToDouble((0 - Convert.ToInt16(DateTime.Now.DayOfWeek))) + 7).ToShortDateString();   //2011/12/17 下周六   this .TextBox9.Text = DateTime.Now.AddDays(Convert.ToDouble((6 - Convert.ToInt16(DateTime.Now.DayOfWeek))) + 7).ToShortDateString();   //2011-12-01 本月一号   this .TextBox10.Text =DateTime.Now.ToString( "yyyy-MM-01" );   //2011/12/31 本月最后一天   this .TextBox11.Text=DateTime.Parse(DateTime.Now.ToString( "yyyy-MM-01" )).AddMonths(1).AddDays(-1).ToShortDateString();   //2011/11/1 上个月一号   this .TextBox12.Text=System.DateTime.Parse(DateTime.Now.ToString( "yyyy-MM-01" )).AddMonths(-1).ToShortDateString();   //2012/1/1 下个月一号   this .TextBox13.Text=System.DateTime.Parse(DateTime.Now.ToString( "yyyy-MM-01" )).AddMonths(1).ToShortDateSring();

DateTime.Now.ToString () Usage