Reading Giant Text Files With Powershell

Mark Broadbent has a quick Powershell script to read a selection from a giant text file:

I recently ran into this very same problem in which the bcp error message stated:

An error occurred while processing the file “D:\MyBigFeedFile.txt” on data row 123798766555678.

Given that the text file was far in excess of notepad++ limits (or even easy human interaction usability limits), I decided not to waste my time trying to find an editor that could cope and simply looked for a way to pull out a batch of lines from within the file programmatically to compare the good rows with the bad.

Click through for a precise and useful Powershell snippet.  The .NET file stream libraries are also good for this kind of thing.

Related Posts

Rounding to Intervals in Various Languages

Dave Mason doesn’t like rounding to intervals very much in T-SQL: If I had to choose any of these options for production, I’d probably go with Query 1, just because I think it would make the most sense to any other developer that might encounter it (including future me, who probably wouldn’t remember writing the […]

Read More

Powershell Dot-Sourcing

Shane O’Neill takes us through some of the intricacies of dot-sourcing in Powershell: The dot used to represent the location is, as I’ve said before, for the current location. Our ConvertTo-Message02 script changed it’s location as part of the script. When we used the “dot source dot location” method, we weren’t using where our function is as a […]

Read More


March 2018
« Feb Apr »