/// <summary>
/// Implements a simple user interaction to ask for a directory to traverse
/// and compute statistics for.
/// </summary>
public static void DemoDirectoryTreeTraversal()
{
Console.WriteLine();
Console.WriteLine();
Console.WriteLine();
Console.WriteLine("This demo visits (traverses) all sub-directories of a");
Console.WriteLine("given directory and outputs the size of all files in the end.");
Console.WriteLine();
Console.WriteLine("Please input a path e.g. 'C:' (without quotes) or just press enter if you");
Console.WriteLine("do not want to see this demo right now.");
string path = Console.ReadLine();
if (string.IsNullOrEmpty(path) == true)
{
return;
}
if (path.Length == 2) // Change 'C:' into 'C:\' to make sure its a valid path
{
if (path[1] == ':')
{
path += '\\';
}
}
var res = new DirSizeResult(); // Initialize result object
// You can use LevelOrder<T>, PostOrder<T>, and PreOrder<T> here
var Order = new LevelOrder <DirSizeResult, DirectoryInfo>();
res = Order.Traverse(new DirectoryInfo(path)
, i => i.GetDirectories()
, res
, ComputeDirSize
, i => Console.Write(".") // print a simple progress indicator
, (i, exc, j) => // print a simple child exception indicator
{ Console.Write("D"); return(i); }
);
double kBSize = res.Size / 1024;
double mBSize = res.Size / 1024 / 1024;
double gBSize = res.Size / 1024 / 1024 / 1024;
Console.WriteLine();
Console.WriteLine();
Console.WriteLine(" Folders found: {0}", res.Folders);
Console.WriteLine(" Files found: {0}", res.Files);
Console.WriteLine("Directory Size is: {0} Kb, {1} Mb, {2} Gb", kBSize, mBSize, gBSize);
Console.WriteLine();
Console.WriteLine();
Console.WriteLine();
}
/// <summary>
/// Implements a method that computes statistics
/// (number of folders, files, and their size)
/// for each directory in <paramref name="d"/>.
/// </summary>
/// <param name="res"></param>
/// <param name="d"></param>
/// <returns></returns>
private static DirSizeResult ComputeDirSize(DirSizeResult res, DirectoryInfo d)
{
res.Folders++;
try
{
FileInfo[] fis = d.GetFiles();
foreach (FileInfo fi in fis)
{
res.Files++;
res.Size += fi.Length;
}
}
catch
{
// No access to files could be handled here ...
Console.Write("F");
}
return(res);
}
