PS>$null-eq$undefinedVariableTrue 如果碰巧错误键入变量名称,PowerShell 会将它视为不同的变量,并且值为$null。 找到$null值的另一种方法是,当它们来自未提供任何结果的其他命令时。 PowerShell PS>functionGet-Nothing{} PS>$value=Get-NothingPS>$null-eq$valueTrue ...
Get-Variable -Name 在Import-Csv中添加对 W3C 扩展日志文件格式的支持 以前,Import-Csvcmdlet 不能用于直接导入 W3C 扩展日志格式的日志文件,还需要执行其他作。 通过此更改,支持 W3C 扩展日志格式。 当CSV 文件中存在类型信息时,Import-Csv在导入时应用pstypenames ...
Invoke-Sqlcmd [-AccessToken <String>] [[-Query] <String>] [-QueryTimeout <Int32>] [-ErrorLevel <Int32>] [-SeverityLevel <Int32>] [-MaxCharLength <Int32>] [-MaxBinaryLength <Int32>] [-AbortOnError] [-DisableVariables] [-DisableCommands] [-Variable <PSObject>] [-InputFile <String...
ERROR: Variable: found in expression: is not defined. ERROR:Cannot process argument transformation on parameter 'DriveLetter'. Cannot convert value "$DriveLetter" to type "System.Char". Error: "String must be exactly one character long." escape the single quote inside an insert statement Escapin...
Get-WindowsFeature cmdlet.$env:PSModulePath=$WindowsPSModuleFolder# Call Windows PowerShell to get the info about the Web-Server feature&$WindowsPSExe-command$WindowsFeatureScriptBlock-args$FileName}finally{# Reset the env variable even if there's an error.$env:PSModulePath=$InitialPSModulePath...
Remove-VariableMicrosoft.PowerShell.Utilityhelp Remove-WmiObjectMicrosoft.PowerShell.Managementhelp Remove-WSManInstanceMicrosoft.WSMan.Managementhelp Rename-ItemMicrosoft.PowerShell.Managementhelp Rename-ItemPropertyMicrosoft.PowerShell.Managementhelp Reset-ComputerMachinePasswordMicrosoft.PowerShell.Managementhelp Resolve...
The $ErrorActionPreference variable takes one of the ActionPreference enumeration values: SilentlyContinue, Stop, Continue, Inquire, Ignore, Suspend, or Break. You can use a cmdlet's ErrorAction common parameter to override the preference for a specific command. The valid values are as follow...
{"id":"ResetPasswordPage","type":"USER","urlPath":"/resetpassword/:userId/:resetPasswordToken","__typename":"PageDescriptor"},"__typename":"PageResource"},{"lastUpdatedTime":1730819800000,"localOverride":null,"page":{"id":"AllBlogs.Page","type":"CUSTOM","urlPath":"/blogs","__...
Variable ShouldProcess {Variable} Certificate ShouldProcess {Cert} 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 这里你感兴趣的可能只是“Drives”列,它就是用来管理各自驱动器的名称。你也看到了,注册表提供程序挂载了驱动器HKLM:(根目录HKEY_LOCAL_MACHINE)和HKCU:(根目录HKEY_CURRENT_USER)。这些驱动器...
Example 1: Using the $input variable In the following example, accessing the $input variable clears the variable until the next time the process block executes. Using the Reset method resets the $input variable to the current pipeline value. PowerShell Copy function Test { begin { $i =...