The Scenario: You want to query AD, Exchange, SharePoint, etc. Powershell: check variable for null. On one hand, working with a CSV file couldn’t be easier.

When one of my friends there told me they just can’t look at the Event Viewer anymore. to quickly retrieve some basic, but really useful information about something really common. If you are working a lot with PowerShell parameters and inputs you need to check if variables have the right value and are not “null”. Posted on July 29, 2016 July 29, 2016 by Adam Fowler. Working with CSV files in PowerShell is a common practice. Finding out if an object has a null (i.e. the CSV export puts the data in the correct format, but where items have no data for version, publisher, etc..., it represents it as ",," (see below) When importing the CSV, the blank values are re-interpreted as NULL, which throws the program for a loop, as it is expecting a string. Create a free account to continue. We typically then choose to act upon that value. Limited access with a free account allows you to: View three pieces of content (articles, solutions, posts, and videos) Sometimes however you may find yourself in a situation where you get a file that has blank lines in it, and those lines can break your script.

Consider this scenario – you’ve found a bunch of old disabled accounts that someone forgot to remove the ‘Manager’ field. Consider this scenario – you’ve found a bunch of old disabled accounts that someone forgot to remove the ‘Manager’ field. You import the file, loop on its records and you’re good to go. I see a lot of posts, questions and scripts that involve importing a CSV file into PowerShell. blank) value or not isn’t a difficult task to do. Here is how you can check a PowerShell variable is null. Hi I get the follwoing error when trying to pipe output to a csv file " Cannot bind argument to parameter 'InputObject' because it is null. Working with CSV files in PowerShell is a common practice. Null and Not Null with PowerShell. Skipping empty CSV objects. PR Summary Fix #12279. Why? PowerShell: Event Viewer saver Two weeks ago I was helping out at my old company (it is part of my old contract with them). blank) value or not isn’t a difficult task to do. You import the file, loop on its records and you’re good to go. Sometimes however you may find yourself in a situation where you get a file that has blank lines in it, and those lines can break your script. Learn the difference between a null, empty string, and white space value for a PowerShell variable and how to test for them. You can try running the command with Path instead of @{Name=’Path’; Expression={Convert-Path $_.Path}}, but you’ll see that the ‘Path’ column in the CSV has extra info that PowerShell cares about, but you probably don’t. Thanks for using Experts Exchange. That’s called a calculated property, and it’s a feature of Select-Object (for more info, see the help topic for Select-Object). Add null check because AsNeeded parameter in ConvertTo-Csv and ExportTo-Csv cmdlets needs to analyze a value before quoting. PR Context PR Checklist PR has a meaningful title Use the present tense and imperative mood when describing your changes Summarized changes Make sure all .h, .cpp, .cs, .ps1 and .psm1 files have the correct copyright header This PR is …