Working with variables To create a new variable, use an assignment statement to assign a value to the variable. You don't have to declare the variable before using it. The default value of all variables is$null. To get a list of all the variables in your PowerShell session, typeGet-Va...
Working with preference variables This document describes each of the preference variables. To display the current value of a specific preference variable, type the variable's name. For example, the following command displays the $ConfirmPreference variable's value. PowerShell Copy $ConfirmPref...
For more information about the $ErrorActionPreference variable, see about_Preference_Variables. Try/Catch The way exception handling works in PowerShell (and many other languages) is that you first try a section of code and if it throws an error, you can catch it. Here is a quick sample....
Windows PowerShell Tip: Creating and Modifying Environment Variables Windows PowerShell Tip: Determining the Size of a Folder Windows PowerShell Tip: Displaying a Message in the Notification Area Windows PowerShell Tip: Filtering Collections With Regular Expressions Windows PowerShell Tip: Finding All th...
You can create and update the value of environment variables with the following syntax: PowerShell $Env:<variable-name> ="<new-value>" For example, to create theFooenvironment variable: PowerShell $Env:Foo='An example' Because environment variables are always strings, you can use them like ...
Windows PowerShell Tip: Creating and Modifying Environment Variables Windows PowerShell Tip: Determining the Size of a Folder Windows PowerShell Tip: Displaying a Message in the Notification Area Windows PowerShell Tip: Filtering Collections With Regular Expressions Windows PowerShell Tip: Finding All th...
Note Quoting rules are documented in detail in the PowerShell help system. Run Get-Help about_Quoting_Rules for more information. See also Using the help system Working with variables and objects目录 上一章 下一章首页 书籍详情 目录 听书 自动阅读00...
Get-Variable Cmdlet Gets the variables in the current console. New-Variable Cmdlet Creates a new variable. Set-Variable Cmdlet Sets the value of a variable. Creates the variable if one with the requested name does not exist. Remove-Variable Cmdlet Deletes a variable and its value. ...
Windows PowerShell providers when it initializes the runspace and the corresponding session state, which tracks the providers in a global dictionary. The session state uses a path search mechanism to find all the *.cmdletprovider files reflected in the PSCOMMANDPATH and PATH environment variables. ...
Putting&at the end of a pipeline causes the pipeline to be run as a PowerShell job. When a pipeline is backgrounded, a job object is returned. Once the pipeline is running as a job, all*-Jobcmdlets can be used to manage the job. Variables (ignoring process-specific variables) used ...