VS字符串时间转换用法
1.把hundred year表示的时间转换成普通时间，当然也可以用ToOADate()得到该日期的hundred year时间
System.DateTime.FromOADate(double.Parse("41340"))
{3/7/2013 12:00:00 AM}
2.把字符串转换成datatime
DateTime dt = Convert.ToDateTime("8/23/2012");
{1/1/0001 12:00:00 AM}
3.一些时间格式的format,注意大写M指月份，小写m指分钟
string dateStr = DateTime.Today.ToString("yyyy MMMM", System.Globalization.DateTimeFormatInfo.InvariantInfo);
"2013 April"
DateTime.Today.ToString("dddd, dd MMMM yyyy HH:mm:ss")
Sunday, 07 April 2013 00:00:00
System.DateTime.FromOADate(double.Parse("41340"))
{3/7/2013 12:00:00 AM}
2.把字符串转换成datatime
DateTime dt = Convert.ToDateTime("8/23/2012");
{1/1/0001 12:00:00 AM}
3.一些时间格式的format,注意大写M指月份，小写m指分钟
string dateStr = DateTime.Today.ToString("yyyy MMMM", System.Globalization.DateTimeFormatInfo.InvariantInfo);
"2013 April"
DateTime.Today.ToString("dddd, dd MMMM yyyy HH:mm:ss")
Sunday, 07 April 2013 00:00:00
DateTime.Today.ToString("ddd, dd MMM yyyy HH':'mm':'ss 'GMT'")
Sun, 07 Apr 2013 00:00:00 GMT
DateTime.Today.ToString("yyyyMMdd hhmmssfff")
20130407 120000000
DateTime.Now.ToString("yyyyMMdd hhmmssfff")
20130407 041007557
