CODEWITHSUNDEEP
vb.net
Nick LaMarca
Nick LaMarca

Reputation: 8188

Validate CCYYMMDD date using VB.Net

What is the best way to validate a date, that it is actually a date if the input format is in CCYYMMDD as a string (i.e. "20101210")?

Upvotes: 1

Views: 545

Answers (2)

Karl Anderson
Karl Anderson

Reputation: 34846

If you want an exception thrown if the date is not valid, then do this:

Dim date As Datetime = DateTime.ParseExact(theDateString, "yyyyMMdd", _
    CultureInfo.InvariantCulture)

If you do not want an exception thrown if the data is not valid, then do this:

Dim myDate As Date    
If Date.TryParseExact(theDateString, "yyyyMMdd", CultureInfo.CurrentCulture, _
    DateTimeStyles.None, myDate) Then
    ' Conversion succeeded
Else
    ' Conversion failed
End If

Upvotes: 6

shf301
shf301

Reputation: 31394

Use DateTime.TryParseExact. It takes a date format string along with a date string and will return false if the string does not match the format exactly.

Upvotes: 0

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