Visual C# 2008, How to mass rename files

[rickymccall]

i have a website and that website allows users to upload images the website is hosted on our Intranet and the file names are changed to have a random file name and for ease of use i am to create an application which searches for the file names within a directory and for each image change it from a randomly generated number such as "1279220339" to something such as "pic1" though to "pic4000" it is my understanding that the best method of doing this would be a for next loop however i do not understand how i would implement the plan of renaming a large quantity of files please any help would be most deeply appreciated, the images are in ".jpg" format and i am using Microsoft Visual C# Express Edition to create the application preferably in the form of a windows form application.

[EINSTEIN_007]

Try the below code:

@echo off
if .%1==./? (
echo Changes all filenames in the given dir to lowercase
echo.
echo %~n0 dir [/s]
echo.
echo dir The directory.
echo /s Include subdirectories of 'dir'.
goto :EOF)
setlocal
pushd %1
if .%2==. (
set DIRCMD=/L/B
echo Rename all filenames in %1 to lowercase filenames?&goto :Anykey
) else if /i .%1==./S (
set DIRCMD=/L/B/S/A-D
echo Rename all filenames in %1 and its subdirs to lowercase filenames?&goto :Anykey
) else (
echo Invalid switch: %*&goto :End)
:Anykey ---------------------------------------------------------------
for /f "tokens=*" %%F in ('dir/s') do move "%%F" "%%F"
:End ------------------------------------------------------------------
popd&endlocal&goto :EOF

[rickymccall]

Thanks for the speedy reply i am assuming from the format of the code that this is a .bat batch file however would you mind explaining to me how this works and how i can get the images to start as "123456789" to go to "pic123456789"
Many Thanks Ricky

[JAMES_911]

The most simple requirement and above script without indention makes it hard to read, and some variable isn't utilized throughout the script after lots of if-else checking, eg. DIRCMD


@echo off & setlocal enabledelayedexpansion

for /f "tokens=*" %%a in ('dir/b/s/l') do (
set f=%%a
set f=!f:%%~dpa=!
ren "%%a" "!f!"

[rickymccall]

im sorry its just i still do not understand the only language i have used and have been taught to use at college was Visual C# in creating form applications and those applications i have created do not save nor access external files, the language is different and i do not understand all of the code however what is required is changing all file names from one directory there is 0 sub directories and all file names are randomly assigned using integers at 9 - 11 numbers per name and then the file extension .jpg i need to keep the file names the same whilst also adding "pic" at the beginning of the file name

[$tatic]

If you are using Visual C# to change the file name (renaming the file) then you must use something similar to the below code:

using System;
using System.IO;
namespace FileRename
{
class MyClass
{
static void Main(string[] args)
{
try
{
DirectoryInfo mydir = new DirectoryInfo(@"F:\Pictures\New Folder");
FileInfo[] a = mydir.GetFiles("*.jpg");
int i = 0, j = 0;
string filePath;
foreach (FileInfo j in a)
{
filePath = @"F:\Pictures\New Folder\" + "pic" + i.ToString(j)+".jpg";
a.MoveTo(filePath);
i++;
j++;
}
Console.WriteLine("Successful");
}
catch (Exception e)
{
Console.WriteLine("Failed", e.ToString());
}
}
}
}

[rickymccall]

the code is good but 5 errors

Error 1 A local variable named 'j' cannot be declared in this scope because it would give a different meaning to 'j', which is already used in a 'parent or current' scope to denote something else

Error 2 The best overloaded method match for 'int.ToString(System.IFormatProvider)' has some invalid arguments


Error 3 Argument '1': cannot convert from 'System.IO.FileInfo' to 'System.IFormatProvider'


Error 4 'System.Array' does not contain a definition for 'MoveTo' and no extension method 'MoveTo' accepting a first argument of type 'System.Array' could be found (are you missing a using directive or an assembly reference?)


Error 5 Operator '++' cannot be applied to operand of type 'System.IO.FileInfo'