Batch to retrieve date string from text file
Posted: 12 Jan 2011 07:00
Hello,
I have built a batch file that when opened adds current date and time to an external text file with the commands:
Every time the batch runs a new line containg date and time is added to the text file as dd/mm/yyyy hh:mm:ss. It works fine. However, I would also like the same batch file to read the content of the last line in that text file before adding a new line. In particular if the date in the last line (i.e. just the "dd/mm/yyyy" part) is different than the current date, then a blank line should be added before the new entry.
this is a concrete example of what i would like to achieve:
1) case where the same date is verified:
12/01/2011 11.34
12/01/2011 11.50 (last line)
12/01/2011 12.34 (new entry)
2) case where the last date is different form the current:
11/01/2011 9.32
11/01/2011 10.52 (last line)
12/01/2011 12.34 (new entry)
Is it possible? how do I retrieve the date from the text file and compare it with the current date? I read how to extract characters from the beginning of a string once acquired (set str=%str:~0,10%) but i'm missing the rest...
Thank you.
S.
I have built a batch file that when opened adds current date and time to an external text file with the commands:
Code: Select all
@echo off
echo %date% %time% >> flexiLog.txtEvery time the batch runs a new line containg date and time is added to the text file as dd/mm/yyyy hh:mm:ss. It works fine. However, I would also like the same batch file to read the content of the last line in that text file before adding a new line. In particular if the date in the last line (i.e. just the "dd/mm/yyyy" part) is different than the current date, then a blank line should be added before the new entry.
this is a concrete example of what i would like to achieve:
1) case where the same date is verified:
12/01/2011 11.34
12/01/2011 11.50 (last line)
12/01/2011 12.34 (new entry)
2) case where the last date is different form the current:
11/01/2011 9.32
11/01/2011 10.52 (last line)
12/01/2011 12.34 (new entry)
Is it possible? how do I retrieve the date from the text file and compare it with the current date? I read how to extract characters from the beginning of a string once acquired (set str=%str:~0,10%) but i'm missing the rest...
Thank you.
S.
