Regex Email Address Validation Fails If Underscore Character Present
Aug 31, 2010
My Regex works, except if the email address entered has an underscore character (_) in it.
Because of my lack of experience with regular expressions, I'm not sure where in my pattern I'm supposed to add the offending character to allow it:
Dim pattern As String = "^[-a-zAZ0-9][-.a-zA-Z0-9]*@[-.a-zA-Z0-0]+(.[-.a-zA-Z0-0+)*." & _
"(com|edu|info|gov|int|mil|net|org|biz|name|museum|coop|aero|pro|tv|[a-zA-Z]{2})$"
He said he fixed it by adding the _ after the numeric check.
I see the A-Z0-9, but I'm not sure which is the numeric check...
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Mar 7, 2012
I have been using a function to validate email addresses for awhile now. Yesterday i discovered that the code indicates that 2 different email addresses are invalid when in reality they are perfectly fine.
The code uses RegEx to determine if an email address is valid. I have tried to understand RegEx, but I can never seem to figure it out. Here is the
Private Sub btnCheckEmail_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnCheckEmail.Click
If ValidateEmailAddress(txtEmail.Text) = True Then
[Code]....
How can the RegEx be re-written to allow the local part (before the @ symbol) to be 1 character, and/or be a number? I understand the "a-z" part, but i don't understand what [w.-] means, or why the a-z is duplicated before the @ symbol.
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Feb 9, 2011
In member register page, I added email address validation but it only check the email address format, such as .com, .net, .org.If user inputs fake account such as aaabbb01010@gmail.com, how to verify it and return an error?
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Feb 9, 2009
I have to make a basic program that: Create a program with a simple interface that
1. Asks the user type his/her email address into a textbox.
2. When the user clicks the "Evaluate Email Address" button, one of two message boxes pops up: "That is a valid email address!" with an "Information" icon, or "That is an invalid email address!" and on a second line, "Please retype your email address.", with an "Exclamation" icon
3. To be considered valid, the email address must -include an "@" symbol, and -it must end in either ".com", ".net", or ".org" or ".edu" (I don't know how to check a string and test if its last four characters end with any of these and make it say not valid email address. I think I might have to use a case statement)
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Feb 11, 2012
how to validation Domain and Email Address for sending email in visual basic 2010 i used Code Below
[code]...
But Get Return abc123@xsd.com is a valid EmailID How is Valid The Domain is Not Valid Then..?
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Apr 17, 2012
I've tried implementing a rather simple email validation function that seems return a false match even though the input is a valid email. I have searched for any issues with the existing regex but it seems to be correct.Even though the match returns a false value the program is stepping to the next validation level (which it shouldn't).Here is the email validation function.
Function EmailAddressChecker(ByVal emailAddress As String) As Boolean
Dim regExPattern As String = "^[A-Z0-9._%+-]+@[A-Z0-9.-]+.[A-Z]{2,4}$"
Dim emailAddressMatch As Match = Regex.Match(emailAddress, regExPattern)
[code].....
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May 5, 2011
I have a txt box that askes a user to enter his email address and I want to make sure the user enters a correctly formatted email.
The code I have so far is like this
If txtEmail.Text = "" Then
txtEmail.BackColor = Color.Pink
MessageBox.Show("Please Enter your Email")
Exit Sub
Else
txtEmail.BackColor = Color.White
End If
How I can modify this code to make it work and is regular expressions the same for all programming languages? Also for my mobile number text box I only want a user to enter a 10 digit number with only integer numbers.
The code I have so far is
If txtNumber.Text = "" Then
txtNumber.BackColor = Color.Pink
MessageBox.Show("Please Enter your Mobile")
Exit Sub
Else
txtNumber.BackColor = Color.White
End If
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Feb 11, 2010
I am using this regex string in one of my programs to validate email adresses: "^[a-z0-9._%+-]+@[a-z0-9.-]+.[a-z]{2,4}$". This works well for the most part, but I just found out that it doesn't catch an address like this ... "john.doe.@yahoo.com" ... where there's a "." right before the "@", which is invalid, so my program tries to send it & throws an exception. How to modify my regex string to catch this situation?
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Oct 21, 2010
i have tried various ways to accomplish this, but to no avail. I don't know how to generate the replacement text (mailto link) so I just used a bunch of x's until I can figure it out. Here is what I have (which currently not replacing emails in string): Here is my Code behind:
[Code]...
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Jul 19, 2011
I am using this expression to validate e-mail addresses:
"^[_a-z0-9-]+(.[a-z0-9-]+)@[a-z0-9-]+(.[a-z0-9-]+)*(.[a-z]{2,4})$"
I noticed that in order for the e-mail address to validate, I need to put in at least 3 characters before the @ symbol. Is this a requirement? What if I just want to have an e-mail address with 1 or 2 characters before the @ symbol?
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Dec 2, 2011
Well my question is simple, I want to match a string with following attributesNo white spaceMust start with a letterMust not contain any other special characters other than nderscore
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Feb 1, 2011
I have several HotKeys setup in my program that functionally are working, my problem is with the dispaying of the text. The underscore does not appear when the program is running.I have several radio buttons that have the text property set to something like "&1 Fold" while in design mode the underscore is present, but when the program is running the underscore is not present. FYI the background is set to transparent.
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Jul 15, 2010
A client for our company contains an apostrophe in their email name joe's@joe.com. I was advised that this is the correct and current email for the given client. Below is the Expression string I am using with Regex (which I copied from the internet somewhere) to validate email addresses. How can this expression be modified to allow/accept apostrohe's?
strRegex =
"^([a-zA-Z0-9_-.]+)@(([[0-9]{1,3}.[0-9]{1,3}.[0-9]{1,3}.)|(([a-zA-Z0-9-]+.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(]?)$"
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Jul 12, 2009
do I focus back from a cell if its validation fails?With CellValidating event, if I set e.Cancel=True it prevents my cell from leaving.
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Dec 15, 2011
I wouuld like to open outlook with new email with provided subject line, body message and attachment but no email address. User will enter the email address and click send . How can I do this?
I used following code but it gives me error for to address
Dim SmtpServer
As
New SmtpClient()
[Code]....
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Mar 15, 2012
What I would like to do is create a command button that launches an email from outlook attaching the current word document to a set email address. I'm not fussed if the word document is saved or not as it is only the email receipent that needs it, likewise I don't mind if the code instructs the email to send of just opens it ready to be sent.I have read through loads of forums and tried loads of codes but cannot get any to work.
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Apr 11, 2011
im using vb8.net im struggling to make a program that will display email addresses so in other words if im using ms outlook then by the click of the button the program must go in to the windows registry and then look in the place where the email address is and then read that part and display the address in a text box.
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Dec 1, 2009
i can send email through vb.net behind code but how do i implement so that the recipient cannot see the sender email and only the name?i had done alot of research but i can't find any solution about this problem
[Code]...
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Jan 27, 2011
I am sending an email using VS2010 VB which works fine, except I would like to have the recipient see their name in lieu of their email address upon receiving the email. I've tried different 'To' addresses, ([URL]), but nothing seems to work. It always shows the email address when received.
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Mar 28, 2012
How I can make this condition en VB.NET
If e.KeyCode = [a-zA-Z0-9] Then
End if
I have understood that the Keycode are numbers but as I can do this validation with regex?
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Sep 16, 2009
I'm performing an XML.save(filename), but when an invalid character is present, it fails with this error:{"'', hexadecimal value 0x07, is an invalid character."} [code]I've tried playing around with the XML encoding but nothing seems to help.I need to have this data saved, even though its a bunch of odd characters.
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Dec 18, 2010
I need to set validation on a textbox where the user types in their email address... This is not a required field though so I want to allow the form to be submitted if the textbox contains the default text ("Email address").I've posted the code i have already to ensure a valid email address is typed.
<asp:RegularExpressionValidator CssClass="errorpopup" Display="Dynamic" ID="regexpEmail"
ValidationGroup="mySubmit" runat="server" ErrorMessage="<strong>Please enter a valid email address.</strong>"
ControlToValidate="tbEmail" ValidationExpression="w+([-+.']w+)*@w+([-.]w+)*.w+([-.]w+)*"
SetFocusOnError="true" />
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Nov 2, 2009
I'm trying to get started with Fedex'es Address validation service and I'm running into a road block with FedEx's own demo application. [code] It seems to send the request object to the web service, but the"reply" object is returned with "Nothing". I could understand if I wrote the code, but good god... they can't even get their own code to work?
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Oct 15, 2010
I made this small location class so that I can better handle address information which I am going to be sending off in requests to the Google Maps API. One thing I have left to do is some validation to make sure that the address has enough information to return a result back. For the application, the level of accuracy should be as loose as a single City (meaning that it should work as long as a zip code or city/state is provided since it will find the geographic center of that area automatically in Google Maps)
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Jan 7, 2009
I'm making a network monitoring program, and the way it works is after five ping-fails, it sends an email, but I cant get it to work! the test email works fine, so its not the email code.
Dim s As Short
Dim newstr(4) As String
Dim I As Integer
Dim name As String
Dim MS As String
[Code] .....
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May 29, 2009
I get the following error:Application-defined or object-defined error.From what I can understand, it's when I attempt to attach a file to the email, I get that error. What I noticed is that it's because the file is in use.Is there anyway to attach the file anyway? My users are simply not closing their files after saving, right now I'm using computer manager to kick them out. The process is for them to save a file on a server through a share and then I pick that up and send it. Works fine as long as they close the file after save.
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Jan 15, 2012
how to validate an emailid
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Nov 25, 2010
I'm having some problems with validating Urls and IP addresses with RegEx.
This regular expression doesn't work properly. For example, it returns True for "www.123.123.123.123" and "http://www.123.123.123.123".
vb.net
Regex.IsMatch(txtTextBox.Text, "(((http|https)://)|(www.))+(([a-zA-Z0-9._-]+.[a-zA-Z]{2,6})|([0-9]{1,3}.[0-9]{1,3}.[0-9]{1,3}.[0-9]{1,3}))")
[Code]....
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Feb 17, 2009
I know that this is not the best way of doing this, so I am looking for suggestions for cleaning this up. Currently, it only allows the user to enter Alpha characters, spaces, and press the enter and backspace key in a textbox.
'allow alpha characters, spacebar and backspace key only
If (e.KeyChar < "A" OrElse e.KeyChar > "z") _
AndAlso e.KeyChar <> ControlChars.Back AndAlso Asc(e.KeyChar) <> Keys.Enter AndAlso
[code].....
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Dec 22, 2009
i'm using the following code to send an email:
[Code]...
The problem is if I send more than one email to myself my email address keeps repeating itself in the "To" box. If I send an email to myself 3 times, the 3rd e-mails "To" box will say:
[Code]...
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