C # mutual conversion between the current time and number

1,January 1, 1900

Datetime oldtime = Convert. todatetime ( " 1900-1-1 00:00:00 " ); // Construct January 1, 1900
Timespan TS = Datetime. Now. Subtract (oldtime); // calculate the interval from January 1, January 1, 1900 to the present
Double Num = TS. totalseconds; // calculates the total number of seconds for this interval.
Response. Write (Num + " <Br/> " );
Datetime numtodate = Oldtime. addseconds (Num); // Add this number of seconds based on January 1, January 1, 1900 to restore to time
Response. Write (numtodate. tostring ());

2, 00January 1, year 00

 

Datetime time = new datetime (, 5); response. write ("ticks:" + time. ticks + "<br/>"); response. write ("time:" + new datetime (time. ticks ));

Datetime time = new datetime (2005, 5); // constructTime type of January 1, December 5

Response. Write ("ticks:" + time. ticks + "<br/>"); // time. ticks is00March January 1, year 002005Value of the long type in December 5, in the unit of 100 Hao-microseconds

Response. Write ("time:" + new datetime (time. ticks); // new datetime (time. ticks) is restored from a long value to a time type.