Contents tagged with Validation

  • Regular expression to validate email on client side that allow whitespace in both end using RegularExpressionValidator control

    We can have lot of regular expressions here to validate email from client side using ASP.NET RegularExpressionValidator control. Most of them plays well. One can choose any of them based on your requirement.

    Anyway, please back to my point now. we know, trimming or ignoring whitespace is a pretty common requirement, so I would be very surprised if a validation couldn't handle it. Since ASP.NET RegularExpressionValidator control can't handle trim during validate so, we need modify the regex to allow whitespace in both end.

    White space is represented in regex with \s. Zero or more white spaces would be \s*. Therefore, … more