![]() ![]() If we store our variables in an XML format, we can add comments to the variable file if necessary. Write-Host "Attributes individually printed" #When indexed we can call the attributes of the elements #Right now we have an array which means that we have to index $JsonObject = Get-Content $ScriptDir | ConvertFrom-Json #The we pass the output from Get-Content to ConvertFrom-Json Cmdlet #Right now we have an array which means that we have to index #an element to use it $JsonObject.Users #When indexed we can call the attributes of the elements Write-Host "Attributes individually printed" $JsonObject.Users. $ScriptDir += "\jsonfile.json" #Getting information from the json file #The we pass the output from Get-Content to ConvertFrom-Json Cmdlet $JsonObject = Get-Content $ScriptDir | ConvertFrom -Json For those unfamiliar with JSON or need to brush up on the format, please visit $ScriptDir = Split-Path $script:MyInvocation.M圜ommand.Path ![]() The only caveat being that we will need to once again pipe the output of Get-Content to another cmdlet however this time it’s ConvertFrom-Json rather than ConvertFrom-StringData. It is also possible to store external variables in a JSON format. Text files also come with the benefit of not being executable, so if there happens to be malicious code stored in a file you don’t regularly manage it won’t be executed. Storing information in a text file like this is a convenient way to keep information in a human-readable format. Here is what is in ExternalVariablesHashTable.txt: Write-host "`nType of the variable `$program`n" $program = Get-Content -raw -Path $ScriptDir | ConvertFrom-StringData # of the file so that our hashtable is not converted to an object # We use the "raw" parameter here in Get-Content so that when we get the contents # This file is store in plan text and is not in any special format # Getting the contents of the External Variable text file $ScriptDir += "\ExternalVariablesHashTable.txt" Write-host " `nType of the variable `$program `n" $program.GetType ( ) write-host " `nPrinting `$program" $ScriptDir += "\ExternalVariablesHashTable.txt" # Getting the contents of the External Variable text file # This file is store in plan text and is not in any special format # We use the "raw" parameter here in Get-Content so that when we get the contents # of the file so that our hashtable is not converted to an object $program = Get-Content -raw -Path $ScriptDir | ConvertFrom -StringData ![]() To get our hash table from a text file, we will have to pipe the output of the Get-Content to the ConvertFrom-StringData cmdlet to convert the output into a hash table. Just like an array, we can store hash tables in text files. Here is what is in the ExternalVariables.txt file: #So to print all of the strings in $program we use a foreach loop #The Information from the ExternalVariables comes in as an array $External_Variables = Get-Content -Path $ScriptDir # Use get content to get all of the lines that are in the txt files $ScriptDir += "\ExternalVariables.txt" # Use get content to get all of the lines that are in the txt files $External_Variables = Get-Content -Path $ScriptDir #The Information from the ExternalVariables comes in as an array #So to print all of the strings in $program we use a foreach loop foreach ( $string in $External_Variables ) $ScriptDir = Split-Path $script:MyInvocation.M圜ommand.Path For the other options discussed in this post, the data stored in the file types will have to be manually changed. In addtion to dot sourcing, you will also need to ensure that the external variables PowerShell script is signed and that Remote Execution is enabled on your machine.ĭot sourcing can be helpful if we need to get information about something dynamically. ![]() If there is any malicious code in the file, then that code will also run. When a file is dot sourced we are telling PowerShell to execute that script. If you want to experiment with storing external variables you can download the sample files for this post here.ĭot sourcing may be the easiest way to store external variables-but it isn’t always the safest. The examples shown in this post are pretty simple, but that doesn’t mean that it isn’t possible to store fairly complex variables in external files. We will cover the following methods to store variables: Storing them in a PowerShell file is one of the easiest because you can just dot source these files. These external variables can be stored in a variety of file types. It is indeed possible to store variables in external files for PowerShell to use. On our PowerShell community forums, we have recently received questions asking if it is possible to store PowerShell variables in external files, and if so, how is it done. ![]()
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