We’ll start by looking at a built-in PowerShell function for reading data, then look at a custom way of reading data from files using PowerShell. The above applies to most situations involved with parsing data from files. Since many developers have string parsing tools, moving data to a string format – if possible – allows us to re-use many string parsing tools. How to read a file in a manner that easily allows us to parse data we need or allows us to use functions or tools we use with other data. We may have a 100GB file that we only want to read 108KB worth of data. How to read a file by using few system resources. We may face a situation where we want to read every line except the first and last. How to read an entire file, part of a file or skip around in a file.
For reading files efficiently, what are some functions or libraries we can use?įor reading data from files, we generally want to focus on three major functions for completing these tasks along with some examples listed next to them of these in practice: We have many tools for parsing data and wanted to know efficient ways of reading the data for parsing, along with getting specific lines of data from files by number, or by the first or last line of the file. NET, we’re looking for efficient ways to read files with PowerShell that we can use in SQL Server Job Agents, Windows Task Schedulers, or with our custom program, which can execute PowerShell scripts. Since we’re expanding our ability to read these custom files with. $mCreated = $shellfolder.We have some custom files that we receive from different providers and for these situations we are unable to use standard ETL programs without any customization. $shellfile = $shellfolder.ParseName($file) $shellfolder = $shell.Namespace($folder) $shell = New-Object -COMObject Shell.Application $flPath = "M:\Fortune500\Millionaires Club.mov" Set $attrName to the attribute name of the metadata property to get its value ( e.g. Set $flPathto the full path and file name of a file. Note: I've put in conditional logic to help omit null values from the output. I've included looping logic, some parsing and conditional logic, and logic that sets the variable data types to assist with getting the final desired value. Per the guidance on the enumerate file properties in PowerShell post, I've created a variation of this PowerShell logic and put it into a couple scripts to assist with the task.
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