To fetch all the files from directory you need to use Programming language only ASP.NET tag is not enough,
By Assuming you are comfortable with C# I am pasting code here that may help you.
void Page_Load(object s, EventArgs e)
DirectoryInfo di = new DirectoryInfo("c:/inetpub/wwwroot/demos");
FileInfo rgFiles = di.GetFiles("*.aspx");
foreach(FileInfo fi in rgFiles)
Response.Write("<br><a href=" + fi.Name + ">" + fi.Name + "</a>");
and Accept Answer
if it Helped.