Batch File input validation - Make sure user entered correct format

Question

I'm using simple batch-file techniques to get user input:

@ECHO OFF
SET /P UserInput=Please Enter Version as X.X.X.X: 

Do you know how X.X.X.X can be validated where X are numbers?

for example:

User input should be: 1.0.0.23

thanks! :)

Answer 1

That's a fairly simple one - if any other character than numbers or periods exist then it will loop back for another go:

@ECHO OFF
:loop
set "UserInput="
SET /P "UserInput=Please Enter Version as X.X.X.X: "
for /f "delims=0987654321." %%a in ("%UserInput%") do echo Try again & goto :loop

Answer 2

This answer checks for 4 numeric fields dot delimited.

:Prompt
SET /P "UserInput=Please Enter Version as X.X.X.X: "
FOR /F "TOKENS=1-4 DELIMS=." %%i IN ("%UserInput%") DO (
    SET /A n1=1*%%i
    SET /A n2=1*%%j
    SET /A n3=1*%%k
    SET /A n4=1*%%l
)
IF NOT "%UserInput%" == "%n1%.%n2%.%n3%.%n4%" GOTO :Prompt
ECHO %UserInput%

Verification for negative numbers may also be added.