1、寫文件
writefile.aspx

<%@ Import Namespace="System.IO" %> '引入所需的NameSpace
<%
Response.write("Writing the content into Text File in ASP.NET <BR>")
Dim strwriterobj As StreamWriter '聲明一個StreamWriter對象
strwriterobj= File.CreateText("c:aspnet.txt") '新建一個文本文件，賦值給StreamWriter對象
strwriterobj.WriteLine( "Welcome to wonderfull world of ASP.NET Programming" )
'向文件中寫內容
strwriterobj.Close '關閉對象
Response.write("Done with the creation of text file and writing content into it")
%>

2、讀文件
readfile.aspx

<%@ Import Namespace="System.IO" %>
<%
Response.write("Reading the content from the text file ASPNET.TXT <br>")
Dim streamreaderobj As StreamReader '聲明一個StreamReader對象
Dim filecont As String '聲明一個變量保存讀出的內容
streamreaderobj = File.OpenText( "c:aspnet.txt" ) '打開文件賦值到StreamReader對象
Do '按行循環讀取文件內容
filecont = streamreaderobj.ReadLine()
Response.Write( filecont & "<br>" )
Loop Until filecont = ""
streamreaderobj.Close '關閉StreamReader對象
Response.write("<br> Done with reading the content from the file aspnet.txt")
%>

3、刪除文件
Filedelete.aspx

<%@ Import Namespace="System.IO" %>
<%
File.Delete("c:aspnet.txt" ) '刪除文件
Response.write("The File aspnet is deleted successfully !!!" )
%>