DateTime.Now.ToString() 格式化
将文本框中获取系统日期，并转换格式：
//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");
//2007-04-24
this.TextBox21.Text = System.DateTime.Now.ToString("yyyy-MM-dd");
//2007/04/24
this.TextBox21.Text = System.DateTime.Now.ToString("yyyy/MM/dd");
//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");
