validating dates and times

[=?Utf-8?B?cmF1bGF2aQ==?=]

Hi:
(I know there are lots of different ways to do it) no regex, please
if we have string date yyMMdd "080230" whats the best way to test for valid
date ?
Feb will never have 30 days,

2)
if we have string HHmm "3490" whats the best way to test for valid time?
(worng hours wrong minutes)


Thanks for your ideas

[Alun Harford]

Re: validating dates and times

Jon Skeet [C# MVP] wrote:

pipo <nomail@me.comw rote:

>1)
>DateTime test;
>try
>{
>test = DateTime.ParseE xact("080230", "yyMMdd",
>CultureInfo.In variantCulture) ;
>}
>catch (System.FormatE xception form)
>{
>//Not a valid date.
>}
>2)
>The same but then the other format.

>
Why raise an exception when TryParseExact does exactly what you need to
do, but without throwing?

I would say it depends on what you're doing.

If you expect your input to be a date, throwing an exception seems to be
perfectly reasonable - it clearly says, "Something went wrong. I'm now
doing error handling".

Alun Harford