Calculate period expires date in second or minutes or hours or days

Question

I want to create a method it returns string and (calculate the period expires days) differences between expires date and current date.

• if the differences is less than 1 minutes i will return in second ex: 8 seconds

• if the differences is less than 1 hours i will return in minutes ex: 28 minutes

• if the differences is less than 24 (a day) hours i will return in hours ex: 7 hours

• default if not matches any case I will return days ex: 3 days

what I have already tried is

(item.EndDate- DateTime.Today).Days

But is does not work when the difference less than 24 hours it will return 0.

Can you give me suggestion?

Answer 1

To answer the original question

when the difference less than 24 hours it will return 0 can you give me suggestion?

You can use TotalDays;

double ds = ((d1-d2).TotalDays;

Answer 2

You should check your expiration time starting by biggest value (which in your question it's a day). First write your method like below:

public static string CalculateExpirationTime(DateTime expiryDate)
{
    var currentDate = DateTime.Now;
    var dateDifference = (expiryDate - currentDate);

    if (dateDifference.Days >= 1)
        return $"{ dateDifference.Days } day(s) remained";
    else if (dateDifference.Hours >= 1)
        return $"{ dateDifference.Hours } hour(s) remained";
    else if (dateDifference.Minutes >= 1)
        return $"{ dateDifference.Minutes } minute(s) remained";
    else if (dateDifference.TotalSeconds >= 1)
        return $"{ dateDifference.Seconds } second(s) remained";

    return "Expired!";
}

And then call it this way:

string status = CalculateExpirationTime(item.EndDate);

Answer 3

DateTime biggerDate;  // pretend it has some valid value
DateTime smallDate;  //     ditto

TimeSpan datesDiff = biggerDate - smallDate;  // assume a positive diff.

if (dateDiff.TotalMinutes < 1) {return new TimeSpan(0,0,0,8);} else
if (dateDiff.TotalHours < 1)   {return new TimeSpan(0,0,28);} else
if (dateDiff.TotalDays < 1)    {return new TimeSpan(0,7,0);} else
return new TimeSpan(3,0,0);  

------------- or ? --------------

if (dateDiff.TotalMinutes < 1) {return dateDiff.TotalSeconds;} else
if (dateDiff.TotalHours < 1)   {return dateDiff.TotalMinutes;} else
if (dateDiff.TotalDays < 1)    {return dateDiff.TotalHours} else
return dateDiff.TotalDays;

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