Datetime 格式 转化

2017-7-27

DateTime.TryParse(“”27JUL17“”, new CultureInfo("en-us"), DateTimeStyles.None, out d)

2017-01-01 12:00:00

DateTime.TryParseExact(“”20170101 12:00:00“”, "yyyyMMdd HH:mm:ss",CultureInfo.InvariantCulture, DateTimeStyles.None, out d)

DateTime.Now.ToString("yyyyMMdd HH:mm:ss:fffffff") //最多7个f