Validating research


16-Oct-2016 15:51

validating research-57

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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.

Because there are so many valid formats, you're going to have to set some rules for reformatting these phone numbers: 1.

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With these rules in mind, let's create the validation code for a text box named txt Phone: Private Sub txt Phone_Validate(Cancel As Boolean) Dim str Temp As String Dim str Phone As String Dim str Extension As String Dim int Result As Integer Const Default Area Code = "703" ' ' Remove all the grouping characters for ' now. ' str Temp = Replace(txt Phone, "(", "") str Temp = Replace(str Temp, ")", "") str Temp = Replace(str Temp, "-", "") str Temp = Replace(str Temp, " ", "") str Temp = Replace(str Temp, "X", "x") ' ' Break up the digits into the number and ' the extension, if any.

' int Result = In Str(1, str Temp, "x", vb Text Compare) If int Result 0 Then str Extension = Mid(str Temp, int Result 1) str Phone = Left(str Temp, int Result - 1) Else str Phone = str Temp End If If Left(str Phone, 1) = "1" Then str Phone = Mid(str Phone, 2) End If If Len(str Phone) 10 Then Msg Box "Please enter a valid telephone number.", vb Exclamation Cancel = True Exit Sub End If ' ' Prepend the default area code ' If Len(str Phone) = 7 Then str Phone = Default Area Code & str Phone End If ' ' Build the new phone number ' txt Phone = "(" & Left(str Phone, 3) & ") " _ & Mid(str Phone, 4, 3) & "-" _ & Right(str Phone, 4) ' ' Add the extension, if any ' If str Extension I used a default area code of 703, which you can obviously change as needed.

In this 10-Minute Solution, you'll learn how to validate and format a phone number.

Numbers entered without area codes will have a default area code prepended to them. Any extensions will be listed as xnnnnn following the phone number. If an initial 1 is added to the number, it will be removed, since users already know to dial a one before making a long distance call.It was best to convert uppercase X's to lowercase x's for purposes of comparison.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.You take just one course at a time, work at your own pace, and submit lessons online as they are completed.

any of the more common questions asked of the VB Pro involve formatting and validating data.All people from all religions and denominations are welcome to study with us.