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Date format "MM/dd/yy"

Posted on 2015-01-27
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Last Modified: 2015-01-27
I need date to be in this format "MM/dd/yy". I kept getting "String was not recognized as a valid DateTime."

Dim date_str As String = "11/18/2014"
Dim provider As Globalization.CultureInfo = Globalization.CultureInfo.InvariantCulture
Dim result As Date = Date.ParseExact(date_str, "MM/dd/yy", provider)
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Question by:VBdotnet2005
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7 Comments
 
LVL 70

Assisted Solution

by:Éric Moreau
Éric Moreau earned 334 total points
ID: 40573381
you 4 digits in your year, try this:
Dim result As Date = Date.ParseExact(date_str, "MM/dd/yyyy", provider)
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LVL 33

Assisted Solution

by:it_saige
it_saige earned 166 total points
ID: 40573383
Your code works fine for me.

Try this instead:
Module Module1
	Sub Main()
		Dim date_str = "11/18/2014"
		Dim format = "MM/dd/yyyy"
		Dim provider = Globalization.CultureInfo.InvariantCulture
		Dim parsed_date = DateTime.MinValue
		If DateTime.TryParseExact(date_str, format, provider, Globalization.DateTimeStyles.None, parsed_date) Then
			Console.WriteLine("Date: {0}", parsed_date.ToString("MM/dd/yyyy"))
		Else
			Console.WriteLine("Could not parse date")
		End If
		Console.ReadLine()
	End Sub
End Module

Open in new window

Which produces the following output:Capture.JPG-saige-
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Author Comment

by:VBdotnet2005
ID: 40573387
Hi Eric, I want my result to return "11/18/14"
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LVL 70

Accepted Solution

by:
Éric Moreau earned 334 total points
ID: 40573392
then you cannot store the result into a data variable:

Dim result As String = Date.ParseExact(date_str, "MM/dd/yyyy", provider).ToString("MM/dd/yy")
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LVL 33

Expert Comment

by:it_saige
ID: 40573393
Ah, nevermind...  I just realized your format string only has two digits for the year.  You need to do what Eric has suggested in order to parse the date because the string must match the format of the provider.  Parsing is used to take a string and format it to a complete date.  Once there you can print the string in any way that you want; i.e. -
Module Module1
	Sub Main()
		Dim date_str = "11/18/2014"
		Dim format = "MM/dd/yyyy"
		Dim provider = Globalization.CultureInfo.InvariantCulture
		Dim parsed_date = DateTime.MinValue
		If DateTime.TryParseExact(date_str, format, provider, Globalization.DateTimeStyles.None, parsed_date) Then
			Console.WriteLine("Date: {0}", parsed_date.ToString("MM/dd/yy"))
		Else
			Console.WriteLine("Could not parse date")
		End If
		Console.ReadLine()
	End Sub
End Module

Open in new window

Produces the following output -Capture.JPG-saige-
0
 

Author Closing Comment

by:VBdotnet2005
ID: 40573398
Than you both :)
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LVL 33

Expert Comment

by:it_saige
ID: 40573402
The format string tells the parse method, what format the incoming date will be presented it, for example -
Module Module1
	Sub Main()
		Dim date_str = "18:2014-11"
		Dim format = "dd:yyyy-MM"
		Dim provider = Globalization.CultureInfo.InvariantCulture
		Dim parsed_date = DateTime.MinValue
		If DateTime.TryParseExact(date_str, format, provider, Globalization.DateTimeStyles.None, parsed_date) Then
			Console.WriteLine("Date: {0}", parsed_date.ToString("MM/dd/yy"))
		Else
			Console.WriteLine("Could not parse date")
		End If
		Console.ReadLine()
	End Sub
End Module

Open in new window

Produces the following output -Capture.JPG-saige-
0

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