[PowerShell每日技巧]根据主机名获取IP地址(20140128)

DAIC

There is a tiny .NET function called GetHostByName() that is vastly useful. It will look up a host name and return its current IP address:

1. [System.Net.DNS]::GetHostByName('someName')

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With just a simple PowerShell wrapper, this is turned into a great little function that is extremely versatile:

1. function Get-IPAddress
   
2. {
   
3.   param
   
4.   (
   
5.     [Parameter(ValueFromPipeline=$true, ValueFromPipelineByPropertyName=$true)]
   
6.     [String[]]
   
7.     $Name
   
8.   )
   
9. 
   
10.   process
    
11.   { $Name | ForEach-Object { try { [System.Net.DNS]::GetHostByName($_) } catch { } }}
    
12. }

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You can now run the function as-is (to get your own IP address). You can submit one or more computer names (comma separated). You can even pipe in data from Get-ADComputer or Get-QADComputer.

1. Get-IPAddress
   
2. Get-IPAddress -Name TobiasAir1
   
3. Get-IPAddress -Name TobiasAir1, Server12, Storage1
   
4. 'TobiasAir1', 'Server12', 'Storage1' | Get-IPAddress
   
5. Get-QADComputer | Get-IPAddress
   
6. Get-ADComputer -Filter * | Get-IPAddress

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This is possible because the function has both a pipeline binding and an argument serializer.

The -Name argument is fed to ForEach-Object, so no matter how many computer names a user specifies, they all get processed.

The -Name parameter accepts value from the pipeline both by property and as a value. So you can feed in any object that has a "Name" property, but you can also feed in any list of plain strings.

Note that the function has a very simple error handler. If you submit a computer name that cannot be resolved, nothing happens. Add code to the catch block if you want an error message instead.

http://powershell.com/cs/blogs/tips/archive/2014/01/28/getting-dns-ip-address-from-host-name.aspx

ycxb0315

有没有if的教程，谢谢！

ivor

1. http://marui.blog.51cto.com/1034148/293907

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多百度

DAIC

回复 2# ycxb0315


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