I am about to develop a web application, basically it will be a treeview interface in the left frame ,which displays my folder/file structures on hard drive. when user click a node, the image files displays on the right frame --------Should I use ASP.NET ? IF SO, I couldn't find a treeview control in the tool box.

If i should download a control some where else, where is it and just want to make sure I don't want to use database or xml file to display the treeview, I hope to be looping through the file structure directly under ,say,c:\sampleimages\image_1974\

thanks