C#中用Treeview控件加载整个硬盘

//加载节点
private void FillNode(TreeNode TN)
{
if (TN.Text.ToString() != "我的电脑")
{
EnumDirectories(TN);
}
else
{
EnumDrives(TN);
}
}

// 加载盘符
private void EnumDrives(TreeNode ParentNode)
{
if (ParentNode.Nodes.Count == 0)
{
foreach (string drive in Directory.GetLogicalDrives())
{
treeView_disk.SelectedNode = ParentNode;
TreeNode TempNode = new TreeNode();
TempNode.Text = drive.Substring(0, drive.Length - 1);
TempNode.Tag = drive;
TempNode.ImageIndex = 3;
TempNode.SelectedImageIndex = 3;
treeView_disk.SelectedNode.Nodes.Add(TempNode);
treeView_disk.SelectedNode.Nodes[treeView_disk.SelectedNode.Nodes.Count - 1].EnsureVisible();
FillNode(TempNode);
}
}
}

// 递归实现   加载目录
private void EnumDirectories(TreeNode ParentNode)
{
treeView_disk.SelectedNode = ParentNode;
string DirectoryPath = ParentNode.Tag.ToString();
if (ParentNode.Nodes.Count == 0)
{
if (DirectoryPath.Substring(DirectoryPath.Length - 1) != @"/")
DirectoryPath += @"/";
try
{
foreach (string directory in Directory.GetDirectories(DirectoryPath))
{
TreeNode TempNode = new TreeNode();
TempNode.Text = directory.Substring(directory.LastIndexOf(@"/") + 1);
TempNode.Tag = directory;
TempNode.ImageIndex = 1;
TempNode.SelectedImageIndex = 2;
treeView_disk.SelectedNode.Nodes.Add(TempNode);
treeView_disk.SelectedNode.Nodes[treeView_disk.SelectedNode.Nodes.Count - 1].EnsureVisible();
FillNode(TempNode);
}
}
catch (Exception)
{
//异常发生
}
}
}

private void treeView_disk_AfterSelect(object sender, TreeViewEventArgs e)
{ }

//初始化
FillNode(treeView_disk.Nodes[0]);