Option #1: Recursive approach:
private void ListDirectory(TreeView treeView, string path)
{
treeView.Nodes.Clear();
var rootDirectoryInfo = new DirectoryInfo(path);
treeView.Nodes.Add(CreateDirectoryNode(rootDirectoryInfo));
}
private static TreeNode CreateDirectoryNode(DirectoryInfo directoryInfo)
{
var directoryNode = new TreeNode(directoryInfo.Name);
foreach (var directory in directoryInfo.GetDirectories())
directoryNode.Nodes.Add(CreateDirectoryNode(directory));
foreach (var file in directoryInfo.GetFiles())
directoryNode.Nodes.Add(new TreeNode(file.Name));
return directoryNode;
}
Option #2: Non-recursive approach:
private static void ListDirectory(TreeView treeView, string path)
{
treeView.Nodes.Clear();
var stack = new Stack<TreeNode>();
var rootDirectory = new DirectoryInfo(path);
var node = new TreeNode(rootDirectory.Name) { Tag = rootDirectory };
stack.Push(node);
while (stack.Count > 0)
{
var currentNode = stack.Pop();
var directoryInfo = (DirectoryInfo)currentNode.Tag;
foreach (var directory in directoryInfo.GetDirectories())
{
var childDirectoryNode = new TreeNode(directory.Name) { Tag = directory };
currentNode.Nodes.Add(childDirectoryNode);
stack.Push(childDirectoryNode);
}
foreach (var file in directoryInfo.GetFiles())
currentNode.Nodes.Add(new TreeNode(file.Name));
}
treeView.Nodes.Add(node);
}