readfile_in_asp

Membaca file teks di ASP.

Cara membaca file teks di server menggunakan VBScript di ASP

Salah satu tugas terpenting dalam bahasa pemrograman apa pun adalah kemampuan membaca dan menulis file. Langkah-langkah yang terlibat dalam ASP tidak berbeda dengan banyak bahasa lainnya:

1. Tentukan lokasi file
2. Tentukan apakah file tersebut ada
3. Dapatkan pegangan untuk file tersebut
4. Baca isinya
5. Tutup file dan lepaskan semua sumber daya yang digunakan

File I/O di ASP dapat dilakukan dengan menggunakan komponen FileSystemObject . Saat membuka file teks, Anda cukup membukanya sebagai aliran teks, dan aliran teks inilah yang Anda gunakan untuk mengakses konten file.

FileSystemObject memungkinkan Anda melakukan semua operasi penanganan file dan folder. Itu bisa mengembalikan file yang kemudian bisa dibuka sebagai aliran teks, atau bisa mengembalikan objek aliran teks secara langsung.

Berikut ini saya menyajikan dua metode berbeda. Metode pertama mendapatkan objek file dan menggunakannya untuk membuka aliran teks, dan metode kedua membuka aliran teks langsung dari FileSystemObject .

Metode 1:

File: " & Filename & " (size " & FileSize &_ " bytes)

---

" Response.Write "

"

    ' Open the file
    Dim TextStream
    Set TextStream = file.OpenAsTextStream(ForReading, TristateUseDefault)

    ' Read the file line by line
    Do While Not TextStream.AtEndOfStream
        Dim Line
        Line = TextStream.readline
    
        ' Do something with "Line"
        Line = Line & vbCRLF
    
        Response.write Line 
    Loop

    Response.Write "

---

" Set TextStream = nothing Else Response.Write "

File " & Filename &_ " does not exist

" End If Set FSO = nothing %>">

 <% Option Explicit

Const Filename = " /readme.txt "    ' file to read
Const ForReading = 1 , ForWriting = 2 , ForAppending = 3
Const TristateUseDefault = - 2 , TristateTrue = - 1 , TristateFalse = 0

' Create a filesystem object
Dim FSO
set FSO = server . createObject ( " Scripting.FileSystemObject " )

' Map the logical path to the physical system path
Dim Filepath
Filepath = Server . MapPath (Filename)

if FSO.FileExists(Filepath) Then

    ' Get a handle to the file
    Dim file    
    set file = FSO.GetFile(Filepath)

    ' Get some info about the file
    Dim FileSize
    FileSize = file.Size

    Response . Write " 
File: " & Filename & " (size " & FileSize  & _
                   " bytes)
 "
    Response . Write " 
 "

    ' Open the file
    Dim TextStream
    Set TextStream = file.OpenAsTextStream(ForReading, TristateUseDefault)

    ' Read the file line by line
    Do While Not TextStream.AtEndOfStream
        Dim Line
        Line = TextStream.readline
    
        ' Do something with "Line"
        Line = Line & vbCRLF
    
        Response . write Line 
    Loop

    Response . Write " 
 "

    Set TextStream = nothing
    
Else

    Response . Write " 
 File " & Filename & _
                       " does not exist
 "

End If

Set FSO = nothing
%>

Metode 2:

" & Contents & "

---

" TextStream.Close Set TextStream = nothing Else Response.Write "

File " & Filename &_ " does not exist

" End If Set FSO = nothing %>">

 <% Option Explicit

Const Filename = " /readme.txt "    ' file to read
Const ForReading = 1 , ForWriting = 2 , ForAppending = 3
Const TristateUseDefault = - 2 , TristateTrue = - 1 , TristateFalse = 0

' Create a filesystem object
Dim FSO
set FSO = server . createObject ( " Scripting.FileSystemObject " )

' Map the logical path to the physical system path
Dim Filepath
Filepath = Server . MapPath (Filename)

if FSO.FileExists(Filepath) Then

    Set TextStream = FSO.OpenTextFile(Filepath, ForReading, False , TristateUseDefault)

    ' Read file in one hit
    Dim Contents
    Contents = TextStream.ReadAll
    Response . write " 
 " & Contents & " 
 "
    TextStream.Close
    Set TextStream = nothing
    
Else

    Response . Write " 
 File " & Filename & _
                   " does not exist
 "

End If

Set FSO = nothing
%>