Using a batch modifier on a variable
Hello,
I'm writing a batchfile that has to extract the date-modified from a specific file.
I known you can use the special modifier ~t to extract the date/time.
This works only when using one of the internal parameters %1-%9.
Is it possible to assign a value to such an internal parameter (for example %1).
With the SET command it is not working.
Example
set %1=NIS19_201002.csv
echo Modified date is %~t1
pause
Thanks
Frank
I'm writing a batchfile that has to extract the date-modified from a specific file.
I known you can use the special modifier ~t to extract the date/time.
This works only when using one of the internal parameters %1-%9.
Is it possible to assign a value to such an internal parameter (for example %1).
With the SET command it is not working.
Example
set %1=NIS19_201002.csv
echo Modified date is %~t1
pause
Thanks
Frank
ASKER CERTIFIED SOLUTION
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using an external batch file as a function, you could do something similar but this time do not inlcude the ':' before the CALLed batch file (function):
First, create and save the following one-line batch file:
GETFILEDATE.BAT
@set %1=%~t2
Next, in your batch file, CALL the function by passing it a variable name and the filename whose dat and time you assigning to the variable. Like this:
YOURBATCHFILE.BAT
@echo off
::
CALL getfiledate Fdate NIS19_201002.csv
echo File's date is: %Fdate%
::
:: etc...
This means you can re-use the same functions with other batch files. You could build up your own library of function like this however, you must remember to deplot any functions alongside any batch files that may depend on them if you intend to use your batch files on another computer.
The simplest way to do this is to copy the contents of the functions and append them to you your batch file under their respective labels (generated from their filenames, minus the extsion of course). Then scan you batch file for occurances of 'CALL :FunctionName' - in particular, the 'CALL :'-bit with the ':' (colon) and use string substitution to remove the colon like this:
set line=%line:CALL :=CALL %
but this is theoretical stuff and might not even appeal to you at this stage.
First, create and save the following one-line batch file:
GETFILEDATE.BAT
@set %1=%~t2
Next, in your batch file, CALL the function by passing it a variable name and the filename whose dat and time you assigning to the variable. Like this:
YOURBATCHFILE.BAT
@echo off
::
CALL getfiledate Fdate NIS19_201002.csv
echo File's date is: %Fdate%
::
:: etc...
This means you can re-use the same functions with other batch files. You could build up your own library of function like this however, you must remember to deplot any functions alongside any batch files that may depend on them if you intend to use your batch files on another computer.
The simplest way to do this is to copy the contents of the functions and append them to you your batch file under their respective labels (generated from their filenames, minus the extsion of course). Then scan you batch file for occurances of 'CALL :FunctionName' - in particular, the 'CALL :'-bit with the ':' (colon) and use string substitution to remove the colon like this:
set line=%line:CALL :=CALL %
but this is theoretical stuff and might not even appeal to you at this stage.
SOLUTION
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I would too. I find it really odd that I went down the road I did having been influenced by the asker's description.
I can't believe I didn't cover the most obvious!
I can't believe I didn't cover the most obvious!
ASKER
Thanks guys
@echo off
call :GetFileDate NIS19_201002.csv
echo %FileDate%
exit /b
:GetFileDate
set FileDate=%~t1
got :eof