ListView 根据 文件路径 或 扩展名 显示系统文件图标

 private void 获取文件button1_click(object sender, eventargs e)

        {

            folderbrowserdialog1.showdialog();

            string path = folderbrowserdialog1.selectedpath;

            listview1.view = view.list;

            listview1.items.clear();               directoryinfo dir = new directoryinfo(path);               #region 递归遍历文件夹

            foreach (directoryinfo dirfolder in dir.getdirectories())

            {                 listview1.smallimagelist = imagelist1;

                listview1.items.add(dirfolder.name, 0);

            }

            #endregion               #region 递归遍历文件;

            foreach (fileinfo dirfile in dir.getfiles())

            {

                // listview1.items.add(dirfile.name, 1);

                if (!imagelist1.images.keys.contains(dirfile.extension))

                {

                    imagelist1.images.add(dirfile.extension,icon.extractassociatedicon(dirfile.fullname));

                }                 listviewitem lvi = new listviewitem();

                lvi.text = dirfile.name;

                lvi.imageindex = imagelist1.images.keys.indexof(dirfile.extension);

                listview1.items.add(lvi);

             }

             #endregion

        }