
Asp Textstream in ASP
Sure! Heres a focused explanation of TextStream in Classic ASP:
ASP TextStream Object
The TextStream object is part of the FileSystemObject (FSO) and is used to read from or write to text files on the server.
How to Use TextStream
Step 1: Create a FileSystemObject
<%Set fso = Server.CreateObject("Scripting.FileSystemObject")%>
Step 2: Open or Create a Text File with TextStream
Open for Reading
Set file = fso.OpenTextFile(Server.MapPath("example.txt"), 1) ' 1 = ForReadingDim contentcontent = file.ReadAllfile.CloseResponse.Write content
Open for Writing (Overwrite)
Set file = fso.OpenTextFile(Server.MapPath("example.txt"), 2, True) ' 2 = ForWriting, True = create if not existsfile.WriteLine("Hello World!")file.Close
Open for Appending
Set file = fso.OpenTextFile(Server.MapPath("example.txt"), 8, True) ' 8 = ForAppendingfile.WriteLine("Appending this line.")file.Close
Modes for OpenTextFile
Mode Value | Constant | Description |
---|---|---|
1 | ForReading | Open file for reading only |
2 | ForWriting | Open file for writing only (overwrite) |
8 | ForAppending | Open file for writing (append) |
Useful Methods
ReadAll
Reads entire file contents as a string.ReadLine
Reads a single line from the file.Write
Writes a string to the file.WriteLine
Writes a string followed by a newline.Close
Closes the file.
Example: Reading a File Line by Line
<%Set fso = Server.CreateObject("Scripting.FileSystemObject")Set file = fso.OpenTextFile(Server.MapPath("example.txt"), 1)Do Until file.AtEndOfStream Response.Write file.ReadLine() & "<br>"Loopfile.Close%>
Notes
Make sure the ASP process has write permissions on the folder when writing/appending files.
Use
Server.MapPath
to convert virtual paths to physical paths.Always close the file after done to free resources.
If you want a sample to create, read, update, or delete files using TextStream or help with permissions and best practices, just ask!