Compare two data formats(24h and 12AM/PM) in C#

Question

I have following strings:

string s1 = "dd/mm/yyyy hh:mm"; // 24H format
string s2 = "mm/dd/yyyy hh:mm:ss AM/PM" //12H format

I need to compare them in my test (it means that i need to convert s1 to s2 or viceversa). Please help!

Convert your Date strings to `DateTime` using their specific format. Please note that for month it is upper case `MM`, and for AM/PM its `tt`, also for Hour part in first Date String, it should be `HH` (upper case) for 24 hours format. See [Custom Date and Time Format Strings](http://msdn.microsoft.com/en-us/library/8kb3ddd4(v=vs.110).aspx) — Habib, Oct 14 '14 at 19:43

score 4 · Answer 1 · answered Oct 14 '14 at 19:43

4

Convert both to DateTime and then compare them:

var result = DateTime.ParseExact(dt1, "dd/MM/yyyy HH:mm", null) > DateTime.ParseExact(dt2, "MM/dd/yyyy hh:mm:ss tt", null);

answered Oct 14 '14 at 19:43

brz

1

You need MM for the month. – juharr Oct 14 '14 at 19:44
1

Also you need `HH` for first date string, since it will be in 24 hours format. *(Without AM/PM)* – Habib Oct 14 '14 at 19:44
1

Answer is good, shouldn't be downvoted just because of an error, which he'll probably fix right away anyway – Alex Barac Oct 14 '14 at 19:46
1

One more improvement could be to pass `CultureInfo.InvariantCulture` instead of `null` – Habib Oct 14 '14 at 19:47
1

Replace `null` with `DateTimeFormat.InvariantInfo`, otherwise all `/` will be replaced with the localized date separators (in case that they are different). – Tim Schmelter Oct 14 '14 at 19:47

1 Answers1