a user writing "asdf" in the zip-code field and so on. e-mail adresses, the syntax is so complex though, that it doesnt provide much benefit to validate it using a regex. Would you like to answer one of these unanswered questions instead? Validation of user input makes sense to prevent missing or malformed data, eg. Because it has attracted low-quality or spam answers that had to be removed, posting an answer now requires 10 reputation on this site (the association bonus does not count).Before you submit the email entered to the database, you will validate it if it's a valid email address. First add the following imports before your Public Class Form1 Private Sub Button1_Click(sender As System. The ending quotation mark must not be preceded by a backslash character (\).
You can use something like: using System; using System. Instead, the regular expression merely verifies that the top-level domain name consists of between two and twenty-four ASCII characters, with alphanumeric first and last characters and the remaining characters being either alphanumeric or a hyphen (-).If the first character is a quotation mark, match a beginning quotation mark followed by at least one occurrence of any character, followed by an ending quotation mark.regular expression pattern to separate the domain name from the email address.The third parameter is a Match Evaluator delegate that represents the method that processes and replaces the matched text.This tutorial describe how to validate an email address using regex in visual basic NETDisplay Access Table Records in Data Grid View - Visual Basic .