Regex Email Validation problem?

I am using C# with jQuery to validate a bunch of emails entered into a form.

public const string Email = "^([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})$";

This is what I'm using but I seem to be getting wrong 开发者_运维技巧entries ? Can anyone assist me ?

Thanks

It looks like you're double-escaping your backslashes. It's helpful to use the @ syntax for string declaration to avoid this confusion:

public const string Email = @"^([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})$";

You'll be closer without the double-escape:

public const string Email = @"^([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})$";

The \[ after the matched @ is probably also a mistake, leaving...

public const string Email = @"^([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})$";

This page has a great discussion of what regular expression to use for matching email addresses, and the merits of these variants.

Just use the MailAddress class.

http://msdn.microsoft.com/en-us/library/yh392kbs.aspx

I used this. working great :)

 /^((([a-z]|\d|[!#\$%&'\*\+\-\/=\?\^_`{\|}~]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])+(\.([a-z]|\d|[!#\$%&'\*\+\-\/=\?\^_`{\|}~]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])+)*)|((\x22)((((\x20|\x09)*(\x0d\x0a))?(\x20|\x09)+)?(([\x01-\x08\x0b\x0c\x0e-\x1f\x7f]|\x21|[\x23-\x5b]|[\x5d-\x7e]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(\\([\x01-\x09\x0b\x0c\x0d-\x7f]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF]))))*(((\x20|\x09)*(\x0d\x0a))?(\x20|\x09)+)?(\x22)))@((([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])*([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])))\.)+(([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])*([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])))\.?$/i

try this dude,

public const string Email= "^[_a-z0-9-]+(\.[_a-z0-9-]+)*@[a-z0-9-]+(\.[a-z0-9-]+)*(\.[a-z]{2,3})$";

This is regular expression, what i used in my code..all the way tested..and handled every scenario .

(([ ]*[A-Za-z0-9]([_]{1}[A-Za-z0-9])*([.]{1}[A-Za-z0-9])*([-]{1}[A-Za-z0-9])*)+\\@([A-Za-z0-9_\\-\\.])+\\.([A-Za-z]{2,4}))[ ]*(((;|,|; | ;| ; | , | ,){1}"+"([ ]*[A-Za-z0-9]([_]{1}[A-Za-z0-9])*([.]{1}[A-Za-z0-9])*([-]{1}[A-Za-z0-9])*)+\\@([A-Za-z0-9_\\-\\.])+\\.([A-Za-z]{2,4}[ ]*))*)[ ]*