Đoạn script check email hợp lệ trong C#
[csharp]
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;
using System.Globalization;
namespace Smi.Dms.Common
{
public class RegexUtilities
{
bool invalid = false;
public bool IsValidEmail(string strIn)
{
invalid = false;
if (String.IsNullOrEmpty(strIn))
return false;
// Use IdnMapping class to convert Unicode domain names.
try
{
strIn = Regex.Replace(strIn, @"(@)(.+)$", this.DomainMapper,
RegexOptions.None);
}
catch
{
return false;
}
if (invalid)
return false;
// Return true if strIn is in valid e-mail format.
try
{
return Regex.IsMatch(strIn,
@"^(?("")(""[^""]+?""@)|(([0-9a-z]((\.(?!\.))|[-!#\$%&'\*\+/=\?\^`\{\}\|~\w])*)(?<=[0-9a-z])@))" +
@"(?(\[)(\[(\d{1,3}\.){3}\d{1,3}\])|(([0-9a-z][-\w]*[0-9a-z]*\.)+[a-z0-9]{2,17}))$",
RegexOptions.IgnoreCase);
}
catch
{
return false;
}
}
private string DomainMapper(Match match)
{
// IdnMapping class with default property values.
IdnMapping idn = new IdnMapping();
string domainName = match.Groups[2].Value;
try
{
domainName = idn.GetAscii(domainName);
}
catch (ArgumentException)
{
invalid = true;
}
return match.Groups[1].Value + domainName;
}
}
}
[/csharp]
Tham khảo: http://msdn.microsoft.com/en-us/library/01escwtf.aspx
Check Email hợp lệ trong C#
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