In Classic ASP, working with files (reading, writing, creating, deleting) is done using the FileSystemObject (FSO).

How to Work with Files in ASP using FileSystemObject

1. Create FileSystemObject

<%Dim fsoSet fso = Server.CreateObject("Scripting.FileSystemObject")%>

2. Check if a File Exists

If fso.FileExists(Server.MapPath("test.txt")) Then    Response.Write "File exists."Else    Response.Write "File does not exist."End If

3. Create and Write to a File

Dim filePath, filefilePath = Server.MapPath("test.txt")' Create a new text file and write text to itSet file = fso.CreateTextFile(filePath, True)  ' True = overwrite if existsfile.WriteLine "Hello from Classic ASP!"file.CloseSet file = Nothing

4. Read from a File

Dim filePath, file, contentfilePath = Server.MapPath("test.txt")If fso.FileExists(filePath) Then    Set file = fso.OpenTextFile(filePath, 1)  ' 1 = ForReading    content = file.ReadAll    file.Close    Set file = Nothing        Response.Write "File content:<br>" & Server.HTMLEncode(content)Else    Response.Write "File not found."End If

5. Append Text to a File

Dim filePath, filefilePath = Server.MapPath("test.txt")If fso.FileExists(filePath) Then    Set file = fso.OpenTextFile(filePath, 8)  ' 8 = ForAppending    file.WriteLine "Additional line appended."    file.Close    Set file = NothingElse    Response.Write "File not found."End If

6. Delete a File

Dim filePathfilePath = Server.MapPath("test.txt")If fso.FileExists(filePath) Then    fso.DeleteFile(filePath)    Response.Write "File deleted."Else    Response.Write "File not found."End If

File Mode Constants

Clean Up

Set fso = Nothing

Notes

• Use Server.MapPath to convert a relative URL path to a physical path on the server.

• Always handle errors when working with files (e.g., file may be locked, no permissions).

• Avoid storing sensitive info in plain text files.

If you want examples of reading binary files, uploading files with ASP, or listing files in a folder, let me know!