DateTime.ParseExact(..)

16 Aug 2006 12:04 PM

Pablo

Hello,

I have big problem with method ParseExact from class DateTime.
Here is code sample:

'-----------------------------------------------------------------------------------------------------------------------------------------
Module Module1
    Sub Main()
        Console.WriteLine("Start...")
        Try
            Dim dt_ok As DateTime = New DateTime(1899, 12, 29, 0, 0, 0)
            Dim dt_exception As DateTime = New DateTime(1899, 12, 30,
0, 0, 1)

            Dim str_ok As String = dt_ok.ParseExact(dt_ok,
"yyyy-MM-dd", System.Globalization.CultureInfo.InvariantCulture)
            Console.WriteLine("OK: " + str_ok)

            Dim str_exception As String =
dt_exception.ParseExact(dt_exception, "yyyy-MM-dd",
System.Globalization.CultureInfo.InvariantCulture)
            Console.WriteLine("OK: " + str_exception)

        Catch ex As Exception
            Console.WriteLine(ex.Message)
        End Try
        Console.WriteLine("Press ENTER for exit...")
        Console.ReadLine()
    End Sub
End Module
'-----------------------------------------------------------------------------------------------------------------------------------------

For date 1899/12/29(or 31) ParseExact works fine but for date
1899/12/30 i have exception:
String was not recognized as a valid DateTime. (thrown by ParseExact )

I have read about structure DateTime and i know that this time is
special but i don't understand why it dosn't want to work :/

Tkank you for all aswears.

regard
Pawel Modrzejewski

16 Aug 2006 12:25 PM

Cor Ligthert [MVP]

Pablo,

The datetime.parseexact converts a string to a datetime
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/cpref/html/frlrfsystemdatetimeclassparseexacttopic2.asp

You try to convert a datetime to a string
For that is the overloaded DateTime.ToString very good.

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/cpref/html/frlrfSystemConvertClassToStringTopic21.asp

It is very strange that it works with that other date.

I hope this helps,

Cor

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"Pablo" <pawel***@gmail.com> schreef in bericht
news:1155729872.474130.13910@75g2000cwc.googlegroups.com...
> Hello,
>
> I have big problem with method ParseExact from class DateTime.
> Here is code sample:
>
> '-----------------------------------------------------------------------------------------------------------------------------------------
> Module Module1
>    Sub Main()
>        Console.WriteLine("Start...")
>        Try
>            Dim dt_ok As DateTime = New DateTime(1899, 12, 29, 0, 0, 0)
>            Dim dt_exception As DateTime = New DateTime(1899, 12, 30,
> 0, 0, 1)
>
>            Dim str_ok As String = dt_ok.ParseExact(dt_ok,
> "yyyy-MM-dd", System.Globalization.CultureInfo.InvariantCulture)
>            Console.WriteLine("OK: " + str_ok)
>
>            Dim str_exception As String =
> dt_exception.ParseExact(dt_exception, "yyyy-MM-dd",
> System.Globalization.CultureInfo.InvariantCulture)
>            Console.WriteLine("OK: " + str_exception)
>
>        Catch ex As Exception
>            Console.WriteLine(ex.Message)
>        End Try
>        Console.WriteLine("Press ENTER for exit...")
>        Console.ReadLine()
>    End Sub
> End Module
> '-----------------------------------------------------------------------------------------------------------------------------------------
>
> For date 1899/12/29(or 31) ParseExact works fine but for date
> 1899/12/30 i have exception:
> String was not recognized as a valid DateTime. (thrown by ParseExact )
>
> I have read about structure DateTime and i know that this time is
> special but i don't understand why it dosn't want to work :/
>
> Tkank you for all aswears.
>
> regard
> Pawel Modrzejewski
>