How to: Validate Strings That Represent Dates or Times (Visual Basic)

  • Article

The following code example sets a Boolean value that indicates whether a string represents a valid date or time.

Example

Dim isValidDate As Boolean = IsDate("01/01/03")
Dim isValidTime As Boolean = IsDate("9:30 PM")

Compiling the Code

Replace ("01/01/03") and "9:30 PM" with the date and time you want to validate. You can replace the string with another hard-coded string, with a String variable, or with a method that returns a string, such as InputBox.

Robust Programming

Use this method to validate the string before trying to convert the String to a DateTime variable. By checking the date or time first, you can avoid generating an exception at run time.

See Also

Reference

IsDate Function (Visual Basic)

InputBox Function (Visual Basic)

Other Resources

Validating Strings in Visual Basic