Validating email in asp net

04-Dec-2016 12:47

I don't validate email address format anymore (Ok I check to make sure there is an at sign and a period after that).The reason for this is what says the correctly formatted address is even their email? The first Text Box is Name that allows only characters and spaces.The second Text Box is Email that only allows email format.Email address validation is not meant to prevent the user from entering an address that doesn't belong to them.It's purpose is to prevent users from mistyping an address by accident.Hi All, I have a requirement where I want to validate an E-Mail Address in a Text Box as soon as the Address is typed in it.(Not on Submit button click) Please suggest me as to how to appraoch this. because you said ( Not on Submit button click ), I suggest you use javascript to validate the textbox email update : someone post it , you can take a look and if you want to check while typing(not after exiting from textbox),you can use onkeydown instead of onchange and of course,instead of showing an alert,you can display an error image or something but you've got the idea! But when the Page loads, Iam getting a Pop Up message " A Runtime Error has occured. " Line: 388 Error : Expected "{" And it is asking for "Yes" and "No" Hi, My requirement is not to use a Required field and Regular Expression validators which validate on Button Click. I have triet in the same manner which you have explained as above.

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By the way if you put a Regular Expression Validator on the page and go to the design view there is a Validation Expression field that you can use to choose from a list of expressions provided by . Once you choose the expression you want there is a Validation expression: textbox that holds the regex used for the validator @Bart Kiers this is exactly how it should be done.

Instead, I have another (tiny) library that can be used for that which is written in accordance with the specification: Email Validation It's a fairly simple class that implements an actual email address tokenizer instead of using error-prone regexes that no one seems to ever get Well if an email exists and you are sending the synchronous mail, then synchronous mail will respond only when the email will reach the destination.

If an email, is not delivered, then exception occurs e.g "Mail address not found etc..."; In order to validate if the format of the email is correct, then we check via using a Regex.

Another important point to consider is that do you need to be performing this?

If the user is going to be entering an e-mail address in, it should be his or her responsibility to ensure that it was entered in correctly ( You can try one of these free email validation techniques - to track bounced emails, you can build a console app using an open source POP3 library like Indy.

By the way if you put a Regular Expression Validator on the page and go to the design view there is a Validation Expression field that you can use to choose from a list of expressions provided by . Once you choose the expression you want there is a Validation expression: textbox that holds the regex used for the validator @Bart Kiers this is exactly how it should be done.Instead, I have another (tiny) library that can be used for that which is written in accordance with the specification: Email Validation It's a fairly simple class that implements an actual email address tokenizer instead of using error-prone regexes that no one seems to ever get Well if an email exists and you are sending the synchronous mail, then synchronous mail will respond only when the email will reach the destination.If an email, is not delivered, then exception occurs e.g "Mail address not found etc..."; In order to validate if the format of the email is correct, then we check via using a Regex.Another important point to consider is that do you need to be performing this?If the user is going to be entering an e-mail address in, it should be his or her responsibility to ensure that it was entered in correctly ( You can try one of these free email validation techniques - to track bounced emails, you can build a console app using an open source POP3 library like Indy.The part before the @ sign is the local part of the address, and the part after the @ sign is a domain name to which the email message will be sent .