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c#datedatetime
LingnerPoi
LingnerPoi

Reputation: 11

Finding if the two DateTime is within a week

I wanted to find if two DateTime are within a week. One of them is the current system Datetime, which I got it by using:

DateTime CurrentDateTime = new DateTime();
CurrentDateTime = DateTime.Now;

The other DateTime will just be a selected date. Assuming it is stored in a variable called : ExportDate.

So, I can find the difference between them by doing 

ExportDate.Subtract(CurrentDateTime)

But I cannot change this value into a int for comparing... So how should I compare this to DateTime to see if this two dates are greater then 0Days, and less then 7Days.

Upvotes: 1

Views: 615

Answers (5)

Obot Ernest
Obot Ernest

Reputation: 498

This is how you do it in PHP

function isTwoDatesWithinTheSameWeek($date1, $date2){
    $d1 = strtotime($date1); //"2015-01-01"
    $d2 = strtotime($date2); //"2016-01-05"

     $d1w = date("W", $d1);
     $d2w = date("W", $d2);

     return $d1w === $d2w;
}

Upvotes: 0

Sparsha Bhattarai
Sparsha Bhattarai

Reputation: 703

You can simply use the DayOfYear property of DateTime to get the day in the year and then check if the difference is less than 7 or not. You can try:

bool isWithinAWeek = Math.Abs(currentDateTime.DayOfYear-exportDate.DayOfYear)>7?false:true;

Upvotes: 0

Sefe
Sefe

Reputation: 14007

Try to compare the TotalDays of the resulting TimeSpan. Depending on which is later, the result must be between -7 and 7. Use Math.Abs to avoid comparing the value against both bounds:

bool isWithinWeek = Math.Abs(ExportDate - CurrentDate).TotalDays) < 7

If the time of day is irrelevant, compare only the dates:

bool isWithinWeek = Math.Abs(ExportDate.Date - CurrentDate.Date).TotalDays) < 7

Upvotes: 1

user4478810
user4478810

Reputation:

Subtracting two datetimes gives you a TimeSpan. This class comes with a property called TotalDays.

Gets the value of the current TimeSpan structure expressed in whole and fractional days.

Src: https://msdn.microsoft.com/en-Us/library/system.timespan(v=vs.110).aspx

You can use to count the number of days I guess.

Regards, Seb

Upvotes: 1

Parag
Parag

Reputation: 430

You can use 

(ExportDate - CurrentDateTime).TotalDays <= 7

Upvotes: 0

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