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VbScript form validation for phone number, outlook email address formats

Posted on 2003-12-01
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Last Modified: 2008-03-04
Hello,
I need some help regarding form validation of several items I have on a form.
Here is the pseudocode for the telephone format I want

if trim(request.querystring("tel")) does not fit the pattern (555) 555-5555 then     flag="error"
     response.write("Please enter a valid telephone number")
     response.write("<br>")
end if

Here is the pseudocode for the email format I want
*please note that the email I am checking for I only want to check that the address has a "," somewhere in the middle.

if trim(request.querystring("email")) does not fit the pattern AAA, AAA then     flag="error"
     response.write("Please enter a valid telephone number")
     response.write("<br>")
end if

thanks for all help
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Question by:groovymonkey
1 Comment
 
LVL 8

Accepted Solution

by:
nishikanth earned 100 total points
ID: 9856257
For email to check if there is a "," in the email

if InStr(Request.querystring("email"),"@")=0 then
response.write "Error"
end if

------------------------------------------------------------

to check if the phone no. is in proper format

Function CheckString(strToCheck, strRegExp)
  Dim re
  Set re = new RegExp

  re.IgnoreCase = false
  re.global = false
  re.Pattern = strRegExp

  CheckString = re.Test(strToCheck)
End Function

Dim strphone
strphone = Request.querystring("txtphone")

'Make sure it's in the format XXX-XX-XXXX (where each X is a digit)
If CheckString(strphone, "^\(\d{3}\) \d{3}\-\d{4}$") then
  'strphone is valid!
Else
  'strphone is NOT valid
End If


-----------------------------------------------------------
EASIER SOLUTION -
This code can format any phone number to (xxx) xxx-xxxx, this makes the job easier for user and for you. You give xxxxxxxxxx then it will return (xxx) xxx-xxxx

Function FormatPhoneNumber(strNumber)
      Dim strInput       ' String to hold our entered number
      Dim strTemp        ' Temporary string to hold our working text
      Dim strCurrentChar ' Var for storing each character for eval.
      Dim I                 ' Looping var
      
      ' Uppercase all characters for consistency
      strInput = UCase(strNumber)

      ' To be able to handle some pretty bad formatting we strip out
      ' all characters except for chars A to Z and digits 0 to 9
      ' before proceeding.  I left in the chars for stupid slogan
      ' numbers like 1-800-GET-CASH etc...
      For I = 1 To Len(strInput)
            strCurrentChar = Mid(strInput, I, 1)
            ' Numbers (0 to 9)
            If Asc("0") <= Asc(strCurrentChar) And Asc(strCurrentChar) <= Asc("9") Then
                  strTemp = strTemp & strCurrentChar
            End If
            ' Upper Case Chars (A to Z)
            If Asc("A") <= Asc(strCurrentChar) And Asc(strCurrentChar) <= Asc("Z") Then
                  strTemp = strTemp & strCurrentChar
            End If
      Next 'I
      
      ' Swap strTemp back to strInput for next set of validation
      ' I also clear strTemp just for good measure!
      strInput = strTemp
      strTemp = ""
      
      ' Remove leading 1 if applicable
      If Len(strInput) = 11 And Left(strInput, 1) = "1" Then
            strInput = Right(strInput, 10)
      End If
      
      ' Error catch to make sure strInput is proper length now that
      ' we've finished manipulating it.
      If Not Len(strInput) = 10 Then
            ' Handle errors as you see fit.  This script raises a real
            ' error so you can handle it like any other runtime error,
            ' but you could also pass an error back via the function's
            ' return value or just display a message... your choice!
            Err.Raise 1, "FormatPhoneNumber function", _
                  "The phone number to be formatted must be a valid 10 digit US phone number!"

            ' Two alternative error techniques!
            'Response.Write "<B>The phone number to be formatted must be a valid phone number!</B>"
            'Response.End

            ' Note if you use this you'll also need to check for
            ' this below so you don't overwrite it!
            'strTemp = "<B>The phone number to be formatted must be a valid phone number!</B>"
      End If
      
      ' If an error occurred then the rest of this won't get processed!

      ' Build the output string formatted to our liking!
      ' (xxx) xxx-xxxx
      strTemp = "("                             ' "("
      strTemp = strTemp & Left(strInput, 3)     ' Area code
      strTemp = strTemp & ") "                  ' ") "
      strTemp = strTemp & Mid(strInput, 4, 3)   ' Exchange
      strTemp = strTemp & "-"                   ' "-"
      strTemp = strTemp & Right(strInput, 4)    ' 4 digit part

      ' Set return value
      FormatPhoneNumber = strTemp
End Function

''''From asp 101 sample''''

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