PowerShell中把IP转换为长整形数字的方法

//“点分十进制”字符串到数字的转换
filter Convert-IP2Decimal
{
   ([IPAddress][String]([IPAddress]$_)).Address
}

//数字到“点分十进制”的转换
filter Convert-Decimal2IP
{
([System.Net.IPAddress]$_).IPAddressToString
}

PS C:\Documents and Settings\Administrator> filter Convert-IP2Decimal
>> {
>>     ([IPAddress][String]([IPAddress]$_)).Address
>> }
>>
PS C:\Documents and Settings\Administrator>
PS C:\Documents and Settings\Administrator> filter Convert-Decimal2IP
>> {
>> ([System.Net.IPAddress]$_).IPAddressToString
>> }
>>

PS C:\Documents and Settings\Administrator> "192.168.0.1" | Convert-IP2Decimal
16820416
PS C:\Documents and Settings\Administrator> 16820416 | Convert-Decimal2IP
192.168.0.1
PS C:\Documents and Settings\Administrator>