深入浅析ASP在线压缩access数据库的方法

asp在线压缩access数据库原理很简单：利用jro.jetengine的压缩功能建立一个新的数据库文件，然后把原来的删掉、替换！既然这样，压缩程序只需几行就ok了！

把下面的代码保存为**.asp，数据库文件（db.md）放在相同目录下，执行asp搞定！

<%
olddb = server.mappath("db.mdb") '更改数据库地址
newdb = server.mappath("db_new.mdb") '生成临时文件
set fso = server.createobject("scripting.filesystemobject")
set engine = server.createobject("jro.jetengine")
prov = "provider=microsoft.jet.oledb.4.0;data source="
engine.compactdatabase prov & olddb, prov & newdb
set engine = nothing
fso.deletefile olddb '删除临时文件
fso.movefile newdb, olddb
set fso = nothing
response.write "ok"
%>

下面是一个asp在线压缩access数据库的封装函数

function compactdb(dbpath, boolis97)
dim fso, engine, strdbpath
strdbpath = left(dbpath,instrrev(dbpath,"\"))
set fso = createobject("scripting.filesystemobject")
if fso.fileexists(dbpath) then
set engine = createobject("jro.jetengine")
on error resume next
if boolis97 = "true" then
engine.compactdatabase "provider=microsoft.jet.oledb.4.0;data source=" & dbpath, _
"provider=microsoft.jet.oledb.4.0;data source=" & strdbpath & "temp.mdb;" _
& "jet oledb:engine type=" & jet_3x
else
engine.compactdatabase "provider=microsoft.jet.oledb.4.0;data source=" & dbpath, _
"provider=microsoft.jet.oledb.4.0;data source=" & strdbpath & "temp.mdb"
end if
 
if err then
response.write "<script language='javascript'>alert('无法识别数据库类型.');history.go(-1);</script>"
response.end
end if
fso.copyfile strdbpath & "temp.mdb",dbpath
fso.deletefile(strdbpath & "temp.mdb")
set fso = nothing
set engine = nothing
compactdb = "<script>alert('压缩成功！');javascript:history.go(-1);</script>"
else
compactdb = "<script>alert('找不到数据库！\n请检查数据库路径是否输入错误！');history.back();</script>"
end if
end function 

总结

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