Comparison time timespan

The user is not allowed to vote repeatedly within several hours.

Current Time-voting time> allowed voting time

DateTime time1 = System. DateTime. Now;

DateTime time2 = DateTime. Parse ("11:19:17 ");
TimeSpan time3 = time2-time1;

More details ========

Function of the latest posting time

Public string DateStringFromNow (DateTime dt)
{
TimeSpan span = DateTime. Now-dt;
If (span. TotalDays> 60)
{
Return dt. tow.datestring ();
}
Else if (span. TotalDays> 30)
{
Return "1 month ago ";
}
Else if (span. TotalDays> 14)
{
Return "2 weeks ago ";
}
Else if (span. TotalDays> 7)
{
Return "1 week ago ";
}
Else if (span. TotalDays> 1)
{
Return string. Format ("{0} Days Ago", (int) Math. Floor (span. TotalDays ));
}
Else if (span. TotalHours> 1)
{
Return string. Format ("{0} Hours Ago", (int) Math. Floor (span. TotalHours ));
}
Else if (span. TotalMinutes> 1)
{
Return string. Format ("{0} Minutes Ago", (int) Math. Floor (span. TotalMinutes ));
}
Else if (span. TotalSeconds> = 1)
{
Return string. Format ("{0} seconds ago", (int) Math. Floor (span. TotalSeconds ));
}
Else
{
Return "1 second ago ";
}
}

Use TimeSpan in C # To calculate the difference between two times

You can add any time unit between two dates.
Private string DateDiff (DateTime DateTime1, DateTime DateTime2)
{String dateDiff = null;
TimeSpan ts1 = new TimeSpan (DateTime1.Ticks );
TimeSpan ts2 = new TimeSpan (DateTime2.Ticks );
TimeSpan ts = ts1.Subtract (ts2). Duration ();
Datediff = ts. days. tostring () + "day" + ts. hours. tostring () + "Hour" + ts. minutes. tostring () + "Minute" + ts. seconds. tostring () + "seconds ";
Return datediff;
}

Timespan Ts = date1-date2;
Double ddays = ts. totaldays; // Number of days with decimals. For example, if one day is 12 hours, 1.5 is returned.
Int ndays = ts. Days; // Integer Number of days. The result is 1 for 12 hours per day or 20 hours per day.

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.

/// <Summary>
/// Date comparison
/// </Summary>
/// <Param name = "today"> current date </param>
/// <Param name = "writeDate"> input date </param>
/// <Param name = "n"> compare days </param>
/// <Returns> returns true if it is greater than the number of days, and false if it is less than the return value </returns>
Private bool CompareDate (string today, string writeDate, int n)
{
DateTime Today = Convert. ToDateTime (today );
DateTime WriteDate = Convert. ToDateTime (writeDate );
WriteDate = WriteDate. AddDays (n );
If (Today> = WriteDate)
Return false;
Else
Return true;
}