# Replace text at specific line number with other text using notepad++

I have hundreds of input files that are very similar, but contain slight differences.
I want to replace every line 4 in all open documents with another line of text.
The search and replace function does not work, as line 4 has different text in the various files.

A crude example of what I want to do is shown below:

file A line 4: some text

file B line 4: different text

replace line 4 with: new text

I would say that Notepad++ is not the tool to do this job.

Instead, I would suggest that you use a scripting language of some kind to:

• iterate the files
• then iterate the lines
• replace the single line (if it exists)
• then save the file.

Here's a PowerShell script that will do that:

# Set by user to their needs.
$filesToCheck = "C:\path\to\files\*.txt"$lineToChange = 4
$replacementLineText = "New Text" # Gather list of files based on the path (and mask) provided by user.$files = gci $filesToCheck # Iterate over each file. foreach ($file in $files) { # Load the contents of the current file.$contents = Get-Content $file # Iterate over each line in the current file. for ($i = 0; $i -le ($contents.Length - 1); $i++) { # Are we on the line that the user wants to replace? if ($i -eq ($lineToChange - 1)) { # Replace the line with the Replacement Line Text.$contents[$i] =$replacementLineText

# Save changed content back to file.
Set-Content $file$contents
}
}
}