Powershell省略了“输出文件”的CRLF输出

Question

Powershell omits the CRLF when writing to a file

Repro code below

$part1 = "this is one line
This is a second line 
this is not
"
$part2 = "this is almost the last line
this is the last line."

$code =  $part1
$code += $part2

$code

$code  | out-file "test.cs" 
notepad test.cs

When I view the output in Notepad, vs the command prompt, the CRLF line breaks are missing.

Answer 1

The issue here is pressing enter at the console doesn't yield a CRLF in the middle of a string only an LF. You either need to add the CRLF (`r`n) characters to your strings or build them differently. The method below simply replaces LF or CRLF sequences with CRLF. I use the -join operator to combine the strings.

$part1 = "this is one line
This is a second line 
this is not
"
$part2 = "this is almost the last line
this is the last line."

$code = -join ($part1 -replace "\r?\n","`r`n"),($part2 -replace "\r?\n","`r`n")
$code  | out-file "test.cs" 
notepad test.cs

You could build your variables as an array of strings. Then when accessing the objects through the pipeline, the CRLF will automatically be added to each element at output.

$part1 = "this is one line","This is a second line","this is not"
$part2 = "this is almost the last line","this is the last line."
$code = $part1 + $part2
$code | out-file test.cs

You could also use the -split operator to split on the LF or CRLF characters. Keep in mind that the $part1 + $part2 only works because you have an LF at the end of $part1 .

$part1 = "this is one line
This is a second line 
this is not
"
$part2 = "this is almost the last line
this is the last line."

$code = ($part1 + $part2) -split "\r?\n"
$code | out-file test.cs