It’s important to note that even when you use the -ErrorVariable parameter, the $error variable is still updated.īy default, the -ErrorVariable parameter will overwrite the variable with the name that you specify. When you use the -ErrorVariable parameter in a call to a command, the error is assigned to the variable name that you specify. Normally, if you run a Windows PowerShell command and an error occurs, the error record will be appended to the “automatic variable” named $error. One of the benefits of developing cmdlet-style commands instead of basic functions, is that they offer a few “common parameters.” Two of these common parameters are related to error handling: -ErrorAction and -ErrorVariable.įor more information about common parameters in advanced functions and compiled cmdlets, run this command at the Windows PowerShell prompt: This concept allows you to develop commands that have the same feel as compiled cmdlets, while writing them in Windows PowerShell script syntax. When Windows PowerShell 2.0 came out, a new concept was introduced, called Advanced Functions. On the other hand, if you’re new to scripting, or you are a curious, knowledge-driven individual, you might want to consider what we’re talking about today. If you’re coming to Windows PowerShell from a software development background, you’ll most likely pick up on Try-Catch-Finally pretty easily. But have you ever wondered if that was the only way to handle errors? It turns out that although it’s a great way to handle errors, there are still other options! Microsoft Scripting Guy, Ed Wilson, just wrote a post about how to use the Try-Catch-Finally blocks in Windows PowerShell. Today we have guest blogger and Windows PowerShell MVP, Trevor Sullivan… also find Trevor on Twitter ( ) and his blog ( ) Microsoft Scripting Guy, Ed Wilson, is here. Summary : Trevor Sullivan talks about handling errors in Windows PowerShell.
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