private void button11_Click(object sender, EventArgs e)
{
FolderBrowserDialog dilog = new FolderBrowserDialog();
dilog.Description = "请选择文件夹";
if (dilog.ShowDialog() == DialogResult.OK || dilog.ShowDialog() == DialogResult.Yes)
{
TreeviewHelper class1 = new TreeviewHelper();
class1.SetTreeNoByFilePath(treeView1, dilog.SelectedPath, imageList1);
}
}