The Test-Connection cmdlet is displaying unwanted data as part of the result.
Code:
Test-Connection www.microsoft.com -Count 1 -Quiet
It should display just the word: True
Pinging www.microsoft.com [23.204.153.19] with 32 bytes of data:
Reply from 23.204.153.19: bytes=32 time=17ms TTL=58
Ping complete.
True
> $PSVersionTable
Name Value
---- -----
PSVersion 6.1.0-preview.2
PSEdition Core
GitCommitId v6.1.0-preview.2
OS Microsoft Windows 10.0.16299
Platform Win32NT
PSCompatibleVersions {1.0, 2.0, 3.0, 4.0...}
PSRemotingProtocolVersion 2.3
SerializationVersion 1.1.0.1
WSManStackVersion 3.0
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Test-Connection www.microsoft.com -Count 1 -Quiet -InformationAction Continue
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Write-Host 'Hello, world' 6> $null
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Test-Connection www.microsoft.com -Count 1 -Quiet -InformationAction Ignore
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ãš-InformationAction Ignore
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$ErrorActionPreference = 'bogus'
ãš& { $ErrorActionPreference = 'bogus' }
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The value of the -InformationAction parameter, if used, overrides the current value of the $InformationPreference variable.
Within the command or script in which it is used, the InformationAction common parameter overrides the value of the $InformationPreference preference variable, which by default is set to SilentlyContinue.
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function test-func { [cmdletbinding()]param() process { $InformationPreference } }
test-func # gives SilentlyContinue
test-func -InformationAction Continue # gives Continue
test-func -InformationAction Ignore # gives Ignore
5.1ããã³6.0.2ã§ã¯ã次ã®ã¹ããããã§ç€ºãããŠããããã«ã InformationAction
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åãå
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function test-func { [cmdletbinding()]param() process { write-information 'writing' } }
test-func -InformationAction Ignore
ãçæããŸã
Write-Information : The value Ignore is not supported for an ActionPreference variable. The provided value should be used only as a value for a preference
parameter, and has been replaced by the default value. For more information, see the Help topic, "about_Preference_Variables."
At line:1 char:57
+ ... { [cmdletbinding()]param() process { Write-Information 'writing' } }
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : NotSpecified: (:) [Write-Information], NotSupportedException
+ FullyQualifiedErrorId : System.NotSupportedException,Microsoft.PowerShell.Commands.WriteInformationCommand
6.1ã§å€ãã£ãã®ããªã
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ã«èšå®ããããšã¯å¯èœã§ããã -Verbose
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ããããããããã§ãã $False
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Write-Information 'writing' -InformationAction Ignore
ãããããã§ãã¯$InformationAction -eq 'Ignore'
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Function Test-Inf1
{
[CmdletBinding()] Param ( )
Process { Write-Information 'Hello, world!' }
}
Function Test-Inf2
{
[CmdletBinding()] Param ( )
Process { If ($InformationPreference -ne 'Ignore') { Write-Information 'Hello, world!' } }
}
Test-Inf1 -InformationAction Ignore # writes an error
Test-Inf2 -InformationAction Ignore # okay
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åé¡ã®è§£æ±ºã«é¢ããŠéèŠãªã®ã§ã -InformationAction
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# With $InformationAction at its default, 'SilentlyContinue', this invocation is silent.
# If you set it to 'Continue', 'foo' prints.
& { [CmdletBinding()]param() $PSCmdlet.WriteInformation('foo', [string[]] @()) }
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