He joined the Information Strategies team in September 1997 and is now an independent consultant.He has written or contributed to "Visual Basic 6 Bible" (IDG Books Worldwide, 1998), "Using Visual Basic 6" (Que), and "Inside VBScript with Active X" (New Riders Press, 1997).
Conclusion: As we saw, validation requirements for a web application can be easily fulfilled using Angular Validation Directives.While we won't deal with international (non-US) phone numbers here, you can apply these techniques to your local phone number format.In the United States, there are a number of valid formats for phone numbers that might be entered into a form: There are many other variations of this, as well, but those examples should be enough to give you an idea of what we're dealing with here.The expression ", checks the validation on first Name using $invalid and $dirty. Since we have several validation checks on element, we need to display corresponding error messages e.g.This means that if the first Name field is changed and if the value is invalid as per the Angular validation directive e.g. separate error message for maxlength, required, pattern etc.Because there are so many valid formats, you're going to have to set some rules for reformatting these phone numbers: 1.
All numbers will at least be in the format (nnn) nnn-nnnn.
The computer is now smart enough to automatically translate data into the format that has been pre-selected for use in that system, saving timeand no doubtmoney.
Eric Smith has been a senior consultant with Andersen Consulting, specializing in client/server development using Oracle and Visual Basic, and was senior content developer (Visual Basic) at before it was purchased by Fawcette Technical Publications.
Regex class for validate any input string for any specific format.
The following example will allow you to Input Phone Number only.
Next, the code parses out the phone number and the extension. The phone system is such that you can't have a 1 as the first number of either an area code or a phone number prefix.