How to Use timespan in C #

1 eg1.datetime dt1 = datetime. now;
2 datetime dt2 = datetime. Now. adddays (-7 );
3 timespan Ts = dt1-dt2;
4
5 Int days = ts. Days; // The difference between dt1 and dt2
6
7 eg2.
8 // edit whether the month is the same as the month of system Logon
9 If (convert. todatetime (datetime. Now. tow.datestring (). month = convert. todatetime (this. getquerystring ("sdate"). month)
10 {
11 timespan Ts = convert. todatetime (datetime. Now. tow.datestring ()-convert. todatetime (this. getquerystring ("sdate "));
12 idays = ts. days;
13 // You can edit the last three days after logging on to the system.
14 if (idays <4)
15 {
16 submiter submit = new submiter (this, "TT ");
17 this. iseretail. selectedvalue = This. getquerystring ("RID ");
18 this.txt time. Text = This. getquerystring ("sdate"). tostring ();
19 this. inputselect1.wherecondition = "gxlshd = '" + this. getquerystring ("RID") + "'";
20 if (this. getquerystring ("workid ")! = "")
21 This. inputselect1.selectedvalue = This. getquerystring ("workid ");
22 submit. initinsertmode ();
23 setdatagrid ();
24}
25 eg3.c # calculate the difference between the two time points
26
27 /// <summary>
28 // calculate the interval between two dates
29 /// </Summary>
30 /// <Param name = "datetime1"> first date and time </param>
31 /// <Param name = "datetime2"> Second Date and time </param>
32 /// <returns> </returns>
33 private string datediff (datetime datetime1, datetime datetime2)
34 {
35 string datediff = NULL;
36
37 timespan ts1 = new timespan (datetime1.ticks );
38 timespan ts2 = new timespan (datetime2.ticks );
39 timespan Ts = ts1.subtract (ts2). duration ();
40 datediff = ts. Days. tostring () + "day"
41 + ts. Hours. tostring () + "hour"
42 + ts. Minutes. tostring () + "Minute"
43 + ts. Seconds. tostring () + "seconds ";
44
45 return datediff;
46} note:

1. The datetime Value Type represents a specific date time between 00:00:00 on January 1, January 1, 0001 AD and on January 1, December 31, 9999 AD. Therefore, you can use the datetime value type to describe any time within the expected range. A datetime value represents a specific time.
2. the timespan value contains many attributes and methods for accessing or processing a timespan value.
The following list covers some of them:
Add: adds the value to another timespan value.
Days: returns the timespan value calculated by the number of days.
Duration: gets the absolute value of timespan.
Hours: returns the hourly timespan value.
Milliseconds: returns the timespan value in milliseconds.
Minutes: returns the timespan value calculated in minutes.
Negate: returns the opposite number of the current instance.
Seconds: returns the timespan value calculated in seconds.
Subtract: Subtract another timespan value from it.
Ticks: the number of tick values returned for timespan.
Totaldays: returns the number of days indicated by the timespan value.
Totalhours: returns the number of hours represented by the timespan value.
Totalmilliseconds: the number of milliseconds in which the timespan value is returned.
Totalminutes: returns the number of minutes represented by the timespan value.
Totalseconds: returns the number of seconds represented by the timespan value.