How to validate date in C#

Question

I want to validate date within 2 months between a given date using two(2) datepicker

example: DATEPICKERdatefrom = 02/05/2013 and DATEPICKERdateto = 03/08/2013 (dd/mm/yyyy)

what should be my statement?

if ( /*DATEPICKERdatefrom between DATEPICKERdateto is not between 2 months*/ )
{
messagebox.show("the Date must within 2 months")
}
else
{
//GO
}

Simply a matter of crating new `DateTime` instance of your interest and compare it with `>` and `<` operators. — Sriram Sakthivel, Sep 12 '14 at 08:29
Hi, StackOverflow is a site for when you have a problem with existing code. Questions requesting code to be written for you tend to not be well recieved. — dav_i, Sep 12 '14 at 08:30

pushpraj · Answer 1 · 2014-09-12T08:36:44.297

here is an example how you can offset the date.

DateTime twoMonthsBack = DateTime.Now.AddMonths(-2);
DateTime twoMonthsLater = DateTime.Now.AddMonths(2);

you may replace DateTime.Now in the example with your date. and you can choose to validate the same.

perhaps

if(DATEPICKERdateto > DATEPICKERdatefrom.AddMonths(2))
{
    //to date is more than two months from start date
    messagebox.show("the Date must within 2 months");
}
else
{
    //GO
}

above example is based on assumption that from date is always less then to date.

Soner Gönül · Answer 2 · 2014-09-12T12:13:29.250

If these values are DateTime, you can simply use < or > operators to compare.

if((date > DATEPICKERdatefrom) && (date < DATEPICKERdateto))

These operators are overloaded by DateTime as;

[TargetedPatchingOptOut("Performance critical to inline across NGen image boundaries")]
public static bool operator < (DateTime t1, DateTime t2) {
        return t1.InternalTicks < t2.InternalTicks;
}


[TargetedPatchingOptOut("Performance critical to inline across NGen image boundaries")]
public static bool operator > (DateTime t1, DateTime t2) {
        return t1.InternalTicks > t2.InternalTicks;
}

How to validate date in C#

2 Answers2