//Form1_Load
private void Form1_Load(object sender, EventArgs e)
{
List <TreeNode> lstDriveNodes = CFileSystem.RetrieveDriveList(trvFolders);
foreach (TreeNode tnDrive in lstDriveNodes)
{
CFileSystem.RetrieveFolderList(tnDrive.FullPath, trvFolders, tnDrive);
}
}
//trvFolders_BeforeExpand
private void trvFolders_BeforeExpand(object sender, TreeViewCancelEventArgs e)
{
List <TreeNode> lstPaths;
List <TreeNode> lstSubPaths;
//Clear the child nodes out (to refresh / update information)
e.Node.Nodes.Clear();
lstPaths = CFileSystem.RetrieveFolderList(e.Node.FullPath, trvFolders, e.Node);
foreach (TreeNode tnPath in lstPaths)
{
lstSubPaths = CFileSystem.RetrieveFolderList(tnPath.FullPath, trvFolders, tnPath);
//Go down a second level for knowing which folders can expand
if (lstSubPaths != null)
{
foreach (TreeNode tnSubPath in lstSubPaths)
{
CFileSystem.RetrieveFolderList(tnSubPath.FullPath, trvFolders, tnSubPath);
}
}
}
}//end of trvFolders_BeforeExpand
