我希望能够检查电子邮件地址是否有效。
如何在VB中使用正则表达式验证电子邮件地址的有效性?
([\w-+]+(?:\.[\w-+]+)*@(?:[\w-]+\.)+[a-zA-Z]{2,7})
我希望能够检查电子邮件地址是否有效。
如何在VB中使用正则表达式验证电子邮件地址的有效性?
([\w-+]+(?:\.[\w-+]+)*@(?:[\w-]+\.)+[a-zA-Z]{2,7})
MSDN文章:如何验证电子邮件地址格式的有效性
这个示例方法调用Regex.IsMatch(String, String)方法来验证字符串是否符合正则表达式模式。
Function IsValidEmailFormat(ByVal s As String) As Boolean
Return Regex.IsMatch(s, "^([0-9a-zA-Z]([-\.\w]*[0-9a-zA-Z])*@([0-9a-zA-Z][-\w]*[0-9a-zA-Z]\.)+[a-zA-Z]{2,9})$")
End Function
Function validateEmail(emailAddress) As Boolean
Dim email As New Regex("([\w-+]+(?:\.[\w-+]+)*@(?:[\w-]+\.)+[a-zA-Z]{2,7})")
If email.IsMatch(emailAddress) Then
Return True
Else
Return False
End If
Return email.IsMatch(emailAddress)
呢? - Jodrell这是我的方法,不需要搞乱正则表达式,取自我的ElektroKitAPI:
''' ----------------------------------------------------------------------------------------------------
''' <summary>
''' Validates a mail address.
''' </summary>
''' ----------------------------------------------------------------------------------------------------
''' <example> This is a code example.
''' <code>
''' Dim isValid As Boolean = ValidateMail("Address@Gmail.com")
''' Dim isValid As Boolean = ValidateMail("mailto:Address@Gmail.com")
''' </code>
''' </example>
''' ----------------------------------------------------------------------------------------------------
''' <param name="address">
''' The mail address.
''' </param>
''' ----------------------------------------------------------------------------------------------------
''' <returns>
''' <see langword="True"/> if the mail address is valid, <see langword="False"/> otherwise.
''' </returns>
''' ----------------------------------------------------------------------------------------------------
<DebuggerStepThrough>
Public Shared Function ValidateMail(ByVal address As String) As Boolean
If Not address.StartsWith("mailto:", StringComparison.OrdinalIgnoreCase) Then
address = address.Insert(0, "mailto:")
End If
If Not Uri.IsWellFormedUriString(address, UriKind.Absolute) Then
Return False
End If
Dim result As Uri = Nothing
If Uri.TryCreate(address, UriKind.Absolute, result) Then
Return (result.Scheme = Uri.UriSchemeMailto)
Else
Return False
End If
End Function
这个表达式从未给我误报(目前为止),但像任何其他正则表达式一样,使用时需自担风险:
''' ----------------------------------------------------------------------------------------------------
''' <summary>
''' A pattern that matches an e-mail address.
''' <para></para>
'''
''' For Example:
''' <para></para>
''' <c>local@domain.com</c>
'''
''' </summary>
''' ----------------------------------------------------------------------------------------------------
Public Const EMail As String =
"^(?<address>(?<local>[\d\w!#\$%\&'\*\+-/=\?\^_`\\\|~""\(\),:;\<\>@\[\]\{\}\.]+)@(?<domain>[\d\w-\.]+)\..+)$"