How to compare dates in yyyymm format in C#?

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I want to compare dates in yyyyMM format in c#. I will get a date in the mentioned format(eg:202104) and i need to compare it with the current date with similar format. Since it is not a datetime value how to compare the same.

What I have tried:

datetime comparison is known. but how to manage dates with yyyyMM format

Posted 31-May-21 17:55pm

ranio

Updated 31-May-21 20:50pm

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Wendelius · Answer 1 · 2021-05-31T18:37:00

Comparing dates in a specific format does not make sense, dates are dates. If you want to check that part of the date matches you can use the properties of the datetime to extract the desired portion.

For example, if you need to see that year and month for specific dates match, you can use DateTime.Year Property (System) | Microsoft Docs[^] and DateTime.Month Property (System) | Microsoft Docs[^] correspondingly.

OriginalGriff · Answer 2 · 2021-05-31T19:56:00

Convert it to a DateTime object using DateTime.TryParseExact[^] and compare the two results:

C#

string inp = "202104";
DateTime dt;
if (!DateTime.TryParseExact(inp, "yyyyMM", CultureInfo.InvariantCulture, DateTimeStyles.None, out dt))
    {
    ... Report problem with date value ...
    return;
    }

Patrice T · Answer 3 · 2021-05-31T20:50:00

Quote:
datetime comparison is known. but how to manage dates with yyyyMM format

Directly, because it is yyyyMM (in this order), you can directly compare the 2 values.
DateTimes are stored in format yyyyMMDD, dropping the days do not change anything.

C#

string dt1= "202104"
string dt2= "202106"
if (dt1 < dt2) {
  // dt1 is older
}

The problem when you have as MMyyyy format.

How to compare dates in yyyymm format in C#?

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