C#:获取系统当前日期/时间

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C#中获取系统当前日期/时间 方法:
通过调用: System.DateTime.Now.ToString(); 来实现。

调用实例参考:

//2017724日 System.DateTime.Now.ToString("D");//2017-7-24 System.DateTime.Now.ToString("d");  //201772413:46:15System.DateTime.Now.ToString("F"); //201772413:46System.DateTime.Now.ToString("f"); //2017-7-24 13:46:15 System.DateTime.Now.ToString("G"); //2017-7-24 13:46 System.DateTime.Now.ToString("g"); //13:46:15 System.DateTime.Now.ToString("T"); //13:46 System.DateTime.Now.ToString("t"); //20177248:46:15System.DateTime.Now.ToString("U"); //2017-07-24 13:46:15Z System.DateTime.Now.ToString("u"); //724日 System.DateTime.Now.ToString("m");System.DateTime.Now.ToString("M");//Tue, 24 July 2017 13:46:15 GMTSystem.DateTime.Now.ToString("r");System.DateTime.Now.ToString("R"); //20177月 System.DateTime.Now.ToString("y");System.DateTime.Now.ToString("Y");//2017-07-24T15:52:19.1562500+08:00System.DateTime.Now.ToString("o");System.DateTime.Now.ToString("O"); //2017-07-24T13:46:15 System.DateTime.Now.ToString("s"); //2017-07-24 15:52:19 System.DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss:ffff"); //20170724 155648秒 System.DateTime.Now.ToString("yyyy年MM月dd HH时mm分ss秒");