How to loop through all files in a folder using C#

// How much deep to scan. (of course you can also pass it to the method)
const int HowDeepToScan=4;

public static void ProcessDir(string sourceDir, int recursionLvl)
{
if (recursionLvl<=HowDeepToScan)
{
// Process the list of files found in the directory.

string [] fileEntries = Directory.GetFiles(sourceDir);
foreach(string fileName in fileEntries)
{
// do something with fileName
Console.WriteLine(fileName);
}

// Recurse into subdirectories of this directory.
string [] subdirEntries = Directory.GetDirectories(sourceDir);
foreach(string subdir in subdirEntries)
// Do not iterate through reparse points
if ((File.GetAttributes(subdir) & FileAttributes.ReparsePoint) != FileAttributes.ReparsePoint)
{
ProcessDir(subdir,recursionLvl+1);
}
}
}

Source: weblogs.asp.net

// Function: Get specified files (fileType) form sub-directory (sourceDir)
// Return: void
public void getJPGFromSubDir(string sourceDir, string fileType)
{
string[] dirEntries = Directory.GetDirectories(sourceDir);
string fileName, filePath, fullFileName;

foreach (string subDir in dirEntries)
{
DirectoryInfo dir = new DirectoryInfo(subDir);
FileInfo[] imgFiles = dir.GetFiles(fileType);

foreach (FileInfo imgFile in imgFiles)
{
fileName = imgFile.Name;
filePath = imgFile.DirectoryName;
fullFileName = filePath + “\\” + fileName;);
}
}
}