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6 Aug 2009
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Function Checking string with Alphanumeric and Underscore only
Many programming languages use symbols (e.g. &, +, -, ', *, /, etc) for special purposes. To avoid unexpected
error caused by these symbols, developers
may sometimes not want users to key in these symbols to system. The following function checks whether the input string contains special symbols and
spaces. It returns "true" for string containing Alphanumeric (a-z, A-Z, 1-9) or underscore only and returns "false" if string containing special symbol or space.
Function isAlphaNumericUnderScore(ByVal str As String) As Boolean
Return Not System.Text.RegularExpressions.Regex.IsMatch(str, "[^\w]+")
End Function
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