整理C#获取日期显示格式

C#获取当前日期的几种显示格式

有时候需要用一些不常用的日期格式时，总是要去网上查找，很多都是复制粘贴，还不完整。就整理一下。

            DatetimeTextBox.Text += DateTime.Now.ToString() + "\r\n";                           //2021 / 6 / 10 17:01:32
            DatetimeTextBox.Text += DateTime.Now.ToLocalTime().ToString() + "\r\n";             //2021 / 6 / 10 17:01:32
            DatetimeTextBox.Text += DateTime.Now.ToLongDateString().ToString() + "\r\n";        //2021年6月10日
            DatetimeTextBox.Text += DateTime.Now.ToShortDateString().ToString() + "\r\n";       //2021 / 6 / 10
            DatetimeTextBox.Text += DateTime.Now.ToString("yyyy-MM-dd") + "\r\n";               //2021 - 06 - 10
            DatetimeTextBox.Text += DateTime.Now.Date.ToString() + "\r\n";                      //2021 / 6 / 10 0:00:00
            DatetimeTextBox.Text += DateTime.Now.ToString("yyyy-MM-dd hh:mm:ss") + "\r\n";      //2021-06-10 05:05:01            
            DatetimeTextBox.Text += DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss") + "\r\n";      //2021 - 06 - 10 17:05:01 
            DatetimeTextBox.Text += DateTime.Now.ToLongTimeString().ToString() + "\r\n";        //17:01:32
            DatetimeTextBox.Text += DateTime.Now.ToShortTimeString().ToString() + "\r\n";       //17:01
            DatetimeTextBox.Text += DateTime.Now.ToString("hh:mm:ss") + "\r\n";                 //05:01:32
            DatetimeTextBox.Text += DateTime.Now.TimeOfDay.ToString() + "\r\n";                 //17:01:32.5338995
            DatetimeTextBox.Text += DateTime.Now.ToFileTimeUtc().ToString() + "\r\n";           //132677892925338995
            DatetimeTextBox.Text += DateTime.Now.ToOADate().ToString() + "\r\n";                //44357.7094043634
            DatetimeTextBox.Text += DateTime.Now.ToUniversalTime().ToString() + "\r\n";         //2021 / 6 / 10 9:01:32
            DatetimeTextBox.Text += DateTime.Now.Year.ToString() + "\r\n";                      //获取年份 2021
            DatetimeTextBox.Text += DateTime.Now.Month.ToString() + "\r\n";                     //获取月份 6
            DatetimeTextBox.Text += DateTime.Now.DayOfWeek.ToString() + "\r\n";                 //获取星期 Thursday
            DatetimeTextBox.Text += DateTime.Now.DayOfYear.ToString() + "\r\n";                 //获取第几天 161
            DatetimeTextBox.Text += DateTime.Now.Hour.ToString() + "\r\n";                      //获取小时 17
            DatetimeTextBox.Text += DateTime.Now.Minute.ToString() + "\r\n";                    //获取分数 1
            DatetimeTextBox.Text += DateTime.Now.Second.ToString() + "\r\n";                    //获取秒数 32 

毫秒使用f表示，千分之一，万分之一，十万分之一，百万分之一等等，1个f代表一位。
贴一条常用的3位毫秒的；

DatetimeTextBox.Text += DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss fff") + "\r\n";      //2021-06-10 17:12:19 373