How to read files name last character and and rename them by running a batch file

Question

I have 3 files in a folder which are:

XXX_a.txt
XXX_b.txt
XXX_c.txt

The filename can be varied, only the last character of the 3 files a, b and c are not changed

I need to rename the files as below:

XXX_a.txt to first.log
XXX_b.txt to second.log
XXX_c.txt to third.log

How to write a batch file to read each file's name last character and then rename it respectively?

Your help are greatly appreciated, thank you.

Berend · Accepted Answer · 2020-10-14 10:03:44Z

0

You can rename using wildcards:

rename *_a.txt first.log
rename *_b.txt second.log
rename *_c.txt third.log

This assumes there's only a single _a, _b and _c file.

answered Oct 14, 2020 at 10:03

Berend

2,9862 gold badges19 silver badges26 bronze badges

Thank you Berend for your kind and fast response, that what's I need, you're the best! THANKS!
– newbie
Commented Oct 14, 2020 at 11:35

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Io-oI · Accepted Answer · 2020-10-14 22:55:55Z

This answer is intended to show how you can rename your files using batch loops and console executable in c# compiled at run time by batch itself
Where programmatically the repetition of the command will be in charge of assigning the names to your files already comprising a range of scope *_[a-z-0-9]

Two options are provided in this example, name them cardinally or literally:

Also designed to prevent errors from occurring if there is more than one file with the same letter:
Also preventing the occurrence of errors if there is more than one file with the same letter:

XXX_a.txt First.log
YYY_a.txt Second.log
XXX_b.txt Third.log
YYY_b.txt Fourth.log
XXX_c.txt Fifth.log
YYY_c.txt Sixth.log

The c# code is adapted from this post by RAFNAS TP
The command line used to compile with csc.exe:

C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe -w:0 -unsafe+ -codepage:1252 -t:exe -platform:anycpu -out:"Q1594189_Cardinal.exe" "Q1594189_Cardinal.cmd" -o -nologo

C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe -w:0 -unsafe+ -codepage:1252 -t:exe -platform:anycpu -out:"Q1594189_Literal.exe" "Q1594189_Literal.cmd" -o -nologo

The following csc.exe compilers were used/tested [Windows 10 pro 2004]:

C:\Windows\Microsoft.NET\Framework\v2.0.50727\csc.exe

C:\Windows\Microsoft.NET\Framework\v3.5\csc.exe
C:\Windows\Microsoft.NET\Framework64\v3.5\csc.exe

C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe
C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe

You can check for available csc.exe version in your command line using:

>for /f tokens^=* %c in ('where /r %windir%\Microsoft.NET csc.exe^|findstr.exe /i k.*v')do @echo\%c

rem :: returns/outputs :: 
C:\Windows\Microsoft.NET\Framework\v2.0.50727\csc.exe
C:\Windows\Microsoft.NET\Framework\v3.5\csc.exe
C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe
C:\Windows\Microsoft.NET\Framework64\v2.0.50727\csc.exe
C:\Windows\Microsoft.NET\Framework64\v3.5\csc.exe
C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe

This script automatically deletes the files generated on execution

del/q /f "%tmp%\_bs.bin" "!_path!\%~n0.exe"

File "%tmp%\_bs.bin" is generated by decoding strings in base64 to delete 2 lines above, removing the escaping used to mark comments in c#

/* 2>nul || @echo off

Obs.: String source from @LotPings in this answer
File "!_path!\%~n0.exe" is the same path\Q1594189_Cardinal.exe or "path\Q1594189_Literal.exe" is respectively the name of the executable, obtained at run time, where %~n0 is the name of the used bat name concatenated with .exe, forming my_file.bat ==>> my_file.exe
The exeucatel file generated on execution accepts 1 numeric argument (int) and returns the corresponding cardinal or literal string respectively:

C:\>Q1594189_Cardinal.exe 11 
Eleventh

C:\>Q1594189_Literal.exe 11
Eleven

To keep one of these files just remove it from the del command:

del/q /f "%tmp%\_bs.bin" "!_path!\%~n0.exe"

del/q /f "%tmp%\_bs.bin" "!_path!\%~n0.exe"

To keep both, just remove the del command, and the existence of one or both files does not interfere with the main execution:

del/q /f "%tmp%\_bs.bin" "!_path!\%~n0.exe"

It has also been tested and works with only 3 files...

.\Q1594189_Literal.cmd :

/* 2>nul || @echo off

cd /d "%~dp0" && title <nul && title ...\%~nx0
call %:^) && cd /d "%~dp0" && setlocal EnableDelayedExpansion
<con: echo\ && set "_path=!cd!" && pushd %__APPDIR__% && color 0a

set "_flag_c#=-w:0 -unsafe+ -codepage:1252 -t:exe -platform:anycpu" 
set "_flag_c#=!_flag_c#! -out:"!_path!\%~n0.exe" "!_path!\%~nx0" -o -nologo"

for /f tokens^=* %%c in ('where /r ..\Microsoft.NET csc.exe^|findstr.exe /i k.v4
')do <con: cmd.exe /v:on /e:on /s /c ""%%~c" !_flag_c#!" && goto %:^] || goto %:^V

%:^V
timeout.exe /t -1 | echo\ Something's really wrong here^!!. && type "%tmp%\_bs.bin"
<con: ^< nul del/q /f "%tmp%\_bs.bin" "%~dpn0.exe" 2>nul & popd & endlocal & goto :EOF

%:^)
2>nul "%__APPDIR__%Certutil.exe" -decode -f "%~dpnx0" "%temp%\_bs.bin" >nul || goto %:^v
for /f tokens^=* %%i in ('type "%temp%\_bs.bin"')do set "_bs=%%~i" && echo\%%~i && exit /b
rem :: <-----BEGIN ...\_bs.bin ----- G1sxRhtbMEobWzFGG1swSg0K== -----END ...\_bs.bin -----> :: 

%:^]
set "_cnt=0" && set "_range=a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t,u,v,w,x,y,z,0,1,2,3,4,5,6,7,8,9"
for %%A in (!_range!)do for /f eol^=^|delims^= %%G in ('2^>nul %__APPDIR__%where.exe "!_path!:*_%%~A.txt"
')do set /a "_cnt+=1+0" && for /f tokens^=* %%i in ('"!_path!\%~n0.exe" !_cnt!')do <con: rename "%%~G" "%%~i.log" 

timeout.exe -1|echo\Is done^^!!. & 2>nul del/q /f "%tmp%\_bs.bin" "!_path!\%~n0.exe" & popd & endlocal & goto:EOF

rem :: --------------- This C# code is adapted from original RAFNAS TP post in c-sharpcorner.com ::   
rem :: http://www.c-sharpcorner.com/article/convert-numeric-value-into-words-currency-in-c-sharp :: */ 

using System;

class Program
{
    public static void Main(string[] args)
    {
        if (args.Length == 1)
        {
            string number = args[0].ToString();
            Console.WriteLine(String.Format(Program.Tens(number)));
        }
    }

    private static String Tens(String number)
    {
        int _number = Convert.ToInt32(number);
        String name = null;
        switch (_number)
        {
            case 1:  
                name = "One";  
                break;  
            case 2:  
                name = "Two";  
                break;  
            case 3:  
                name = "Three";  
                break;  
            case 4:  
                name = "Four";  
                break;  
            case 5:  
                name = "Five";  
                break;  
            case 6:  
                name = "Six";  
                break;  
            case 7:  
                name = "Seven";  
                break;  
            case 8:  
                name = "Eight";  
                break;  
            case 9:  
                name = "Nine";  
                break; 
            case 10:
                name = "Ten";
                break;
            case 11:
                name = "Eleven";
                break;
            case 12:
                name = "Twelve";
                break;
            case 13:
                name = "Thirteen";
                break;
            case 14:
                name = "Fourteen";
                break;
            case 15:
                name = "Fifteen";
                break;
            case 16:
                name = "Sixteen";
                break;
            case 17:
                name = "Seventeen";
                break;
            case 18:
                name = "Eighteen";
                break;
            case 19:
                name = "Nineteen";
                break;
            case 20:
                name = "Twenty";
                break;
            case 30:
                name = "Thirty";
                break;
            case 40:
                name = "Fourty";
                break;
            case 50:
                name = "Fifty";
                break;
            case 60:
                name = "Sixty";
                break;
            case 70:
                name = "Seventy";
                break;
            case 80:
                name = "Eighty";
                break;
            case 90:
                name = "Ninety";
                break;
                
            default:
                if (_number > 0)
                {
                    name = Tens(number.Substring(0, 1) + "0") + " " + Tens(number.Substring(1));
                }
                break;
        }
        return name;
    }        
}

.\Q1594189_Cardial.cmd :

/* 2>nul || @echo off

cd /d "%~dp0" && title <nul && title ...\%~nx0
call %:^) && cd /d "%~dp0" && setlocal EnableDelayedExpansion
<con: echo\ && set "_path=!cd!" && pushd %__APPDIR__% && color 0a

set "_flag_c#=-w:0 -unsafe+ -codepage:1252 -t:exe -platform:anycpu" 
set "_flag_c#=!_flag_c#! -out:"!_path!\%~n0.exe" "!_path!\%~nx0" -o -nologo"

for /f tokens^=* %%c in ('where /r ..\Microsoft.NET csc.exe^|findstr.exe /i k.v4
')do <con: cmd.exe /v:on /e:on /s /c ""%%~c" !_flag_c#!" && goto %:^] || goto %:^V

%:^V
timeout.exe /t -1 | echo\ Something's really wrong here^!!. && type "%tmp%\_bs.bin"
<con: ^< nul del/q /f "%tmp%\_bs.bin" "%~dpn0.exe" 2>nul & popd & endlocal & goto :EOF

%:^)
2>nul "%__APPDIR__%Certutil.exe" -decode -f "%~dpnx0" "%temp%\_bs.bin" >nul || goto %:^v
for /f tokens^=* %%i in ('type "%temp%\_bs.bin"')do set "_bs=%%~i" && echo\%%~i && exit /b
rem :: <-----BEGIN ...\_bs.bin ----- G1sxRhtbMEobWzFGG1swSg0K== -----END ...\_bs.bin -----> :: 

%:^]
set "_cnt=0" && set "_range=a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t,u,v,w,x,y,z,0,1,2,3,4,5,6,7,8,9"
for %%A in (!_range!)do for /f eol^=^|delims^= %%G in ('2^>nul %__APPDIR__%where.exe "!_path!:*_%%~A.txt"
')do set /a "_cnt+=1+0" && for /f tokens^=* %%i in ('"!_path!\%~n0.exe" !_cnt!')do "<con: rename "%%~G" "%%~i.log" 

timeout.exe -1|echo\Is done^^!!. & 2>nul del/q /f "%tmp%\_bs.bin" "!_path!\%~n0.exe" & popd & endlocal & goto:EOF

rem :: --------------- This C# code is adapted from original RAFNAS TP post in c-sharpcorner.com ::   
rem :: http://www.c-sharpcorner.com/article/convert-numeric-value-into-words-currency-in-c-sharp :: */ 
 
using System;

class Program
{
    public static void Main(string[] args)
    {
        if (args.Length == 1)
        {
            string number = args[0].ToString();
            Console.WriteLine(String.Format(Program.Tens(number)));
        }
    }

    private static String Tens(String number)
    {
        int _number = Convert.ToInt32(number);
        String name = null;
        switch (_number)
        {
                case 1:
                name = "First";
                break;
                case 2:
                name = "Second";
                break;
                case 3:
                name = "Third";
                break;
                case 4:
                name = "Fourth";
                break;
                case 5:
                name = "Fifth";
                break;
                case 6:
                name = "Sixth";
                break;
                case 7:
                name = "Seventh";
                break;
                case 8:
                name = "Eighth";
                break;
                case 9:
                name = "Ninth";
                break;
                case 10:
                name = "Tenth";
                break;
                case 11:
                name = "Eleventh";
                break;
                case 12:
                name = "Twelfth";
                break;
                case 13:
                name = "Thirteenth";
                break;
                case 14:
                name = "Fourteenth";
                break;
                case 15:
                name = "Fifteenth";
                break;
                case 16:
                name = "Sixteenth";
                break;
                case 17:
                name = "Seventeenth";
                break;
                case 18:
                name = "Eighteenth";
                break;
                case 19:
                name = "Nineteenth";
                break;
                case 20:
                name = "Twentieth";
                break;
                case 30:
                name = "Fhirtieth";
                break;
                case 40:
                name = "Fortieth";
                break;
                case 50:
                name = "Fiftieth";
                break;
                case 60:
                name = "Sixtieth";
                break;
                case 70:
                name = "Seventieth";
                break;
                case 80:
                name = "Eightieth";
                break;
                case 90:
                name = "Ninetieth";
                break;
                
                default:
                if (_number > 0)
                {
                    name = Tens(number.Substring(0, 1) + "0") + " " + Tens(number.Substring(1));
                }
                break;
        }
        return name;
    }        
}

Some further reading for cmd/bat files:

[√] Set

[√] For loop

[√] For /F loop

[√] Goto | :label

[√] DOS Tips substrings

[√] Command line building with csc.exe

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