Windows batch looping through subfolders and running a command -


i'm trying have nested loop in windows command prompt go each subfolder in specified folder concatenate text files in there 1 text file. i'm trying use 

for /f  in (.) (for %f in (*.dat) type “%f” >> aggregate.txt)

but not working. me!

i'm not sure if want concatenate .txt or .dat files, should work .dat

(for /r %f in (*.dat) @type "%f")>aggregate.txt

type help for command line more info on many forms of statement.

it more efficient enclose whole command in parentheses , redirection once instead of doing append redirection each file.

edit - solution refined requirement in comment: 1 aggregate per folder

if needed, first delete existing aggregate.txt files

del /s aggregate.txt

then following should give desired result

for /r %f in (*.dat) @type "%f" >>"%~dpf\aggregate.txt"

note if put commands in batch file must double percents before variables. example, %f on command line need %%f in batch file.


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