如何对文件进行操作？-巨人网络通讯

如何对文件进行操作？

%@ LANGUAGE="VBScript" %>

% 'Set file i/o constants.
Const ForReading = 1
Const ForWriting = 2
Const ForAppending = 8
filename = "test.txt"
path = Server.MapPath("data") "\" filename

' 映射文件名到服务器的物理路径.
operation = Request.Form("operation") %>

' 得到请求操作.
html>
head>
title>千花飞舞之处理文件/title>
/head>
body>
font face="Arial,Helvetica" size=2>

table bgcolor="#000000" border=0 cellpadding=1 cellspacing=0>tr>td>
table bgcolor="#008080" border=0 cellpadding=8 cellspacing=0>tr valign=bottom>td>
font face="Arial,Helvetica" size=2>
form action="% = Request.ServerVariables("script_NAME") %>" method="post">
input name="operation" type="radio" value="create"> 创建
input name="operation" type="radio" value="delete"> 删除
input name="operation" type="radio" value="read" checked> 读取
input name="operation" type="radio" value="write"> 写入
input name="operation" type="radio" value="append"> 添加
p>
center>
input type="submit" value="确定"> input type="reset" value="重置">
/center>
/form>
p>
a href="fileops.html">b>返回/b>/a>
/font>
/td>/tr>/table>
/td>/tr>/table>
p>

%
if operation = "create" then
call CreateFile(path)
call ReadFile(path)
elseif operation = "delete" then
call DeleteFile(path)
elseif operation = "read" then
call ReadFile(path)
elseif operation = "write" then
call WriteFile(path)
call ReadFile(path)
elseif operation = "append" then
call AppendFile(path)
call ReadFile(path)
end if

' 执行请求操作.
%>
p>
/font>
/body>/html>

% sub CreateFile(path)
dim fs, file
set fs = CreateObject("Scripting.FileSystemObject")
if fs.FileExists(path) then
Response.Write(b>噢,文件" filename " 已经存在,创建失败!/b>br>" vbCrLf)

' 如果文件早已存在则显示一个错误信息
else
Response.Write(恭喜, " filename "创建成功!br>" vbCrLf)

' 否则创建它并写入数据
set file = fs.CreateTextFile(path)
Response.Write(向" filename "写入数据...br>" vbCrLf)
file.WriteLine("Line 1 added " Now() ".")
file.WriteLine("Line 2 added " Now() ".")
file.WriteLine("Line 3 added " Now() ".")
file.WriteLine("Line 4 added " Now() ".")
file.WriteLine("Line 5 added " Now() ".")
file.Close()
end if
end sub
sub DeleteFile(path)
dim fs, file
set fs = CreateObject("Scripting.FileSystemObject")
if not fs.FileExists(path) then

' 如果文件不存在则显示一个错误信息.
Response.Write(b>噢,文件" filename "不存在,您删除什么!/b>br>" vbCrLf)
else
Response.Write(恭喜," filename "删除成功!br>" vbCrLf)

' 否则删除它.
fs.DeleteFile(path)
end if
end sub
sub ReadFile(path)
dim fs, file
set fs = CreateObject("Scripting.FileSystemObject")
if not fs.FileExists(path) then
Response.Write(b>噢,文件" filename "不存在,您读取什么!/b>br>" vbCrLf)
' 如果文件不存在则显示一个错误信息.

else
set file = fs.OpenTextFile(path, ForReading)
Response.Write(恭喜," filename "读取成功!" vbCrLf)

' 否则打开它并显示内容.
Response.Write("p>" vbCrLf)
Response.Write("hr size=1>" vbCrLf)
Response.Write("font size=3>pre>" vbCrLf)
do while not file.AtEndOfStream
Response.Write(file.ReadLine vbCrLf)
loop
Response.Write("/pre>/font>" vbCrLf)
Response.Write("hr size=1>" vbCrLf)
file.Close()
end if
end sub
sub WriteFile(path)
dim fs, file
set fs = CreateObject("Scripting.FileSystemObject")
if not fs.FileExists(path) then
Response.Write(b>噢,文件" filename "不存在,您写入什么!/b>br>" vbCrLf)

' 如果文件不存在则显示一个错误信息.

else
set file = fs.OpenTextFile(path, ForWriting)

' 否则,改写内容.
Response.Write(Rewriting file " filename ".br>" vbCrLf)
file.WriteLine("Rewritting file with line 1 added " Now() ".")
file.WriteLine("Rewritting file with line 2 added " Now() ".")
file.WriteLine("Rewritting file with line 3 added " Now() ".")
file.Close()
end if

end sub

sub AppendFile(path)

dim fs, file

set fs = CreateObject("Scripting.FileSystemObject")

if fs.FileExists(path) then
set file = fs.GetFile(path)
if file.size > 500 then

' 如果文件存在,检查它的大小并退出,如果它超过500K.
Response.Write(b>噢,文件" filename "超过了大小限制, 添加失败!/b>br>"
vbCrLf)
exit sub
end if

else
Response.Write(噢,文件" filename "不存在!但它将会被创建...br>" vbCrLf)
end if
' 如果文件不存在,显示一个提示信息.

Response.Write(添加内容到文件" filename "...br>" vbCrLf)
set file = fs.OpenTextFile(path, ForAppending, true)
file.WriteLine("添加的新内容:" Now() ".")