check date within last 7 days

[Mike P]

How would I check a datetime variable is within the last 7 days?

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[=?ISO-8859-1?Q?Lasse_V=E5gs=E6ther_Karlsen?=]

Re: check date within last 7 days

Mike P wrote:

How would I check a datetime variable is within the last 7 days?
>
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DateTime dt = ...; // the one you want to check

if (dt >= DateTime.Now.Ad dDays(-7))
{
}

this will rewind the clock 7 days back and check if "dt" is that point
in time, or after it.

However, if the current time of day is mid-day (12:00), and you want the
dt to be in the last 7 "days", where you include the whole day, then you
need to first get a DateTime value within that day 7 days back, and then
rewind the time to midnight.

DateTime dt7 = DateTime.Now.Ad dDays(-7);
dt7 = new DateTime(dt7.Ye ar, dt7.Month, dt7.Day, 0, 0, 0);
if (dt >= dt7)
{
}

--
Lasse Vågsæther Karlsen
mailto:lasse@vk arlsen.no

http://presentationmode.blogspot.com/

PGP KeyID: 0xBCDEA2E3

[Ignacio Machin ( .NET/ C# MVP )]

Re: check date within last 7 days

On May 2, 10:21 am, Lasse Vågsæther Karlsen <la...@vkarlsen .nowrote:

Mike P wrote:

How would I check a datetime variable is within the last 7 days?

>

*** Sent via Developersdexht tp://www.developersd ex.com***

>
DateTime dt = ...; // the one you want to check
>
if (dt >= DateTime.Now.Ad dDays(-7))
{
>
}
>
this will rewind the clock 7 days back and check if "dt" is that point
in time, or after it.
>
However, if the current time of day is mid-day (12:00), and you want the
dt to be in the last 7 "days", where you include the whole day, then you
need to first get a DateTime value within that day 7 days back, and then
rewind the time to midnight.
>
DateTime dt7 = DateTime.Now.Ad dDays(-7);
dt7 = new DateTime(dt7.Ye ar, dt7.Month, dt7.Day, 0, 0, 0);
if (dt >= dt7)
{
>
}
>
--
Lasse Vågsæther Karlsen
mailto:la...@vk arlsen.nohttp://presentationmod e.blogspot.com/
PGP KeyID: 0xBCDEA2E3

I think that you could do the same using DateTime.Today instead of
DateTime.Now

[Duy Lam]

Re: check date within last 7 days

Mike P wrote:

How would I check a datetime variable is within the last 7 days?
>
*** Sent via Developersdex http://www.developersdex.com ***

Maybe the code will be like this:

public static bool IsDateWithin7Da ys(DateTime dtToCheck) {
DateTime last7Days = DateTime.Now.Ad dDays(-7);
return (last7Days <= dtToCheck);
}

--
Thanks,
Duy Lam Phuong