1、写文件
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 \'声明一个StreamWriter对象
strwriterobj= File.CreateText(\"c:/aspnet.txt\") \'新建一个文本文件，赋值给StreamWriter对象
strwriterobj.WriteLine( \"Welcome to wonderfull world of ASP.NET Programming\" )
\'向文件中写内容
strwriterobj.Close \'关闭对象
Response.write(\"Done with the creation of text file and writing content into it\")
%>

2、读文件
readfile.aspx

<%@ Import Namespace=\"System.IO\" %>
<%
Response.write(\"Reading the content from the text file ASPNET.TXT <br>\")
Dim streamreaderobj As StreamReader \'声明一个StreamReader对象
Dim filecont As String \'声明一个变量保存读出的内容
streamreaderobj = File.OpenText( \"c:/aspnet.txt\" ) \'打开文件赋值到StreamReader对象
Do \'按行循环读取文件内容
filecont = streamreaderobj.ReadLine()
Response.Write( filecont & \"<br>\" )
Loop Until filecont = \"\"
streamreaderobj.Close \'关闭StreamReader对象
Response.write(\"<br> Done with reading the content from the file aspnet.txt\")
%>

3、删除文件
Filedelete.aspx

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