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() & ".")
' 当需要给它添加新内容时打开或创建文件
file.close()
end sub %>
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