C#所有日期格式

 Response.Write("Default: " + System.DateTime.Now + "<br>");

            Response.Write("Local Time: " + System.DateTime.Now.ToLocalTime() + "<br>");

            Response.Write("Long Date: " + System.DateTime.Now.ToLongDateString() + "<br>");

            Response.Write("Long Time: " + System.DateTime.Now.ToLongTimeString() + "<br>");

            Response.Write("Short Date: " + System.DateTime.Now.ToShortDateString() + "<br>");

            Response.Write("Short Time: " + System.DateTime.Now.ToShortTimeString() + "<br>");

            Response.Write("ToString Default: " + System.DateTime.Now.ToString() + "<br>");

            Response.Write("Universal Time: " + System.DateTime.Now.ToUniversalTime() + "<br>"); // returns a datetime, which can still be formatted

            // Using Format Strings

            Response.Write("d - Short Date: " + System.DateTime.Now.ToString("d") + "<br>");

            Response.Write("D - Long Date: " + System.DateTime.Now.ToString("D") + "<br>");

            Response.Write("t - Short Time: " + System.DateTime.Now.ToString("t") + "<br>");

            Response.Write("T - Long Time: " + System.DateTime.Now.ToString("T") + "<br>");

            Response.Write("f - Full date/time (short time): " + System.DateTime.Now.ToString("f") + "<br>");

            Response.Write("F - Full date/time (long time): " + System.DateTime.Now.ToString("F") + "<br>");

            Response.Write("g - General: " + System.DateTime.Now.ToString("g") + "<br>");

            Response.Write("G - General: " + System.DateTime.Now.ToString("G") + "<br>");

            Response.Write("M/m - Month day: " + System.DateTime.Now.ToString("M") + "<br>");

            Response.Write("u - Universal Sortable: " + System.DateTime.Now.ToString("u") + "<br>");

            Response.Write("Y/y - Year month: " + System.DateTime.Now.ToString("y") + "<br>");

            // Custom Format Strings

            Response.Write("d, day of month: " + System.DateTime.Now.ToString(" d") + "<br>"); // can't use just "d"

            Response.Write("dd, zero-padded day of month: " + System.DateTime.Now.ToString("dd") + "<br>");

            Response.Write("ddd, abbreviated day of week: " + System.DateTime.Now.ToString("ddd") + "<br>");

            Response.Write("dddd, full day of week: " + System.DateTime.Now.ToString("dddd") + "<br>");

            Response.Write("h, hour: " + System.DateTime.Now.ToString(" h") + "<br>"); // can't use just "h"

            Response.Write("hh, hour, zero padded " + System.DateTime.Now.ToString("hh") + "<br>");

            Response.Write("H, hour, 24-hr " + System.DateTime.Now.ToString(" H") + "<br>"); // can't use just "H"

            Response.Write("H, hour, 24-hr, zero padded " + System.DateTime.Now.ToString("HH") + "<br>");

            Response.Write("m, minute: " + System.DateTime.Now.ToString(" m") + "<br>"); // can't use just "m"

            Response.Write("M, month: " + System.DateTime.Now.ToString(" M") + "<br>"); // can't use just "M"

            Response.Write("MM, month, zero padded: " + System.DateTime.Now.ToString("MM") + "<br>");

            Response.Write("MMM, month abbreviated: " + System.DateTime.Now.ToString("MMM") + "<br>");

            Response.Write("MMMM, month full name: " + System.DateTime.Now.ToString("MMMM") + "<br>");

            Response.Write("y, year (omits century): " + System.DateTime.Now.ToString(" y") + "<br>"); // can't use just "y"

            Response.Write("yy, 2-digit year, zero padded: " + System.DateTime.Now.ToString("yy") + "<br>");

            Response.Write("yyyy, 4-digit year, zero padded: " + System.DateTime.Now.ToString("yyyy") + "<br>");

            Response.Write("s: " + System.DateTime.Now.ToString("s") + "<br>");

执行结果：

Default: 8/12/2007 8:37:36 PM

Local Time: 8/12/2007 8:37:36 PM

Long Date: Saturday, 8 December 2007

Long Time: 8:37:36 PM

Short Date: 8/12/2007

Short Time: 8:37 PM

ToString Default: 8/12/2007 8:37:36 PM

Universal Time: 8/12/2007 12:37:36 PM

d - Short Date: 8/12/2007

D - Long Date: Saturday, 8 December 2007

t - Short Time: 8:37 PM

T - Long Time: 8:37:36 PM

f - Full date/time (short time): Saturday, 8 December 2007 8:37 PM

F - Full date/time (long time): Saturday, 8 December 2007 8:37:36 PM

g - General: 8/12/2007 8:37 PM

G - General: 8/12/2007 8:37:36 PM

M/m - Month day: 08 December

u - Universal Sortable: 2007-12-08 20:37:36Z

Y/y - Year month: December 2007

d, day of month: 8

dd, zero-padded day of month: 08

ddd, abbreviated day of week: Sat

dddd, full day of week: Saturday

h, hour: 8

hh, hour, zero padded 08

H, hour, 24-hr 20

H, hour, 24-hr, zero padded 20

m, minute: 37

M, month: 12

MM, month, zero padded: 12

MMM, month abbreviated: Dec

MMMM, month full name: December

y, year (omits century): 7

yy, 2-digit year, zero padded: 07

yyyy, 4-digit year, zero padded: 2007

s: 2007-12-08T20:39:44