void lbtnParentFolder_Click(object sender, EventArgs e)
{
String parFolder = PathConverter.GetInstance().GetParentDirectory(path);
if (parFolder == this.parentDirectory)
{
parFolder = PathConverter.GetInstance().GetParentDirectory(parFolder);
}
Response.Redirect(String.Format("{0}{1}?Path={2}", baseUrl, pageFilename, parFolder));
}