C#中的日期处理函数 //2007年4月24日 this.TextBox6.Text = System.DateTime.Now.ToString("D"); //2007-4-24 this.TextBox7.Text = System.DateTime.Now.ToString("d");
//2007年4月24日 16:30:15 this.TextBox8.Text = System.DateTime.Now.ToString("F"); //2007年4月24日 16:30 this.TextBox9.Text = System.DateTime.Now.ToString("f");
//2007-4-24 16:30:15 this.TextBox10.Text = System.DateTime.Now.ToString("G"); //2007-4-24 16:30 this.TextBox11.Text = System.DateTime.Now.ToString("g");
//16:30:15 this.TextBox12.Text = System.DateTime.Now.ToString("T"); //16:30 this.TextBox13.Text = System.DateTime.Now.ToString("t");
//2007年4月24日 8:30:15 this.TextBox14.Text = System.DateTime.Now.ToString("U"); //2007-04-24 16:30:15Z this.TextBox15.Text = System.DateTime.Now.ToString("u");
//4月24日 this.TextBox16.Text = System.DateTime.Now.ToString("m"); this.TextBox16.Text = System.DateTime.Now.ToString("M"); //Tue, 24 Apr 2007 16:30:15 GMT this.TextBox17.Text = System.DateTime.Now.ToString("r"); this.TextBox17.Text = System.DateTime.Now.ToString("R"); //2007年4月 this.TextBox19.Text = System.DateTime.Now.ToString("y"); this.TextBox19.Text = System.DateTime.Now.ToString("Y"); //2007-04-24T15:52:19.1562500+08:00 this.TextBox20.Text = System.DateTime.Now.ToString("o"); this.TextBox20.Text = System.DateTime.Now.ToString("O"); //2007-04-24T16:30:15 this.TextBox18.Text = System.DateTime.Now.ToString("s"); //2007-04-24 15:52:19 this.TextBox21.Text = System.DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss:ffff"); //2007年04月24 15时56分48秒 this.TextBox22.Text = System.DateTime.Now.ToString("yyyy年MM月dd HH时mm分ss秒");
//星期二, 四月 24 2007 this.TextBox1.Text = System.DateTime.Now.ToString("dddd, MMMM dd yyyy"); //二, 四月 24 '07 this.TextBox2.Text = System.DateTime.Now.ToString("ddd, MMM d \"'\"yy"); //星期二, 四月 24 this.TextBox3.Text = System.DateTime.Now.ToString("dddd, MMMM dd"); //4-07 this.TextBox4.Text = System.DateTime.Now.ToString("M/yy"); //24-04-07 this.TextBox5.Text = System.DateTime.Now.ToString("dd-MM-yy");
字符型转换转为字符串 12345.ToString("n"); //生成 12,345.00 12345.ToString("C"); //生成 ¥12,345.00 12345.ToString("e"); //生成 1.234500e+004 12345.ToString("f4"); //生成 12345.0000 12345.ToString("x"); //生成 3039 (16进制) 12345.ToString("p"); //生成 1,234,500
时间加减计算 DateTime dt = new DateTime(System.DateTime.Today.Year, System.DateTime.Today.Month, System.DateTime.Today.Day); //获取当前时间 DateTime dt = new DateTime(2010, 10, 17); //一个月中的哪一天
Console.WriteLine("tht day of {0},is {1}", dt.Date, dt.DayOfWeek); //增加月份
dt = dt.AddMonths(2); Console.WriteLine("day light saving {0};{1}", dt.IsDaylightSavingTime(),dt.Month); //构造函数接受小时,分钟,秒 TimeSpan ts = new TimeSpan(4, 30, 0); Console.WriteLine(ts); //从当前减去15分钟 Console.WriteLine(ts.Subtract(new TimeSpan(0,15,0)));
当月第一天0时0分0秒:
DateTime.Now.AddDays(1 - DateTime.Now.Day).Date
当月最后一天23时59分59秒:
DateTime.Now.AddDays(1 - DateTime.Now.Day).Date.AddMonths(1).AddSeconds(-1)
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