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temp = temp & "</table>"
'temp賦值完畢,把它再返回給函數(shù)
DisplayRecords = temp
Else
DisplayRecords = "Data Not Available."
End If
'釋放內(nèi)存
rs.Close
conn.Close
Set rs = Nothing
Set conn = Nothing
End Function

'該函數(shù)是寫入緩存
Function DisplayCachedRecords(Secs)
Dim retVal, datVal, temp1
'Secs是每次要刷新數(shù)據(jù)的時(shí)間, retVal是數(shù)據(jù),datVal是剩余時(shí)間
retVal = Application("cache_demo") '取得appliction的值
datVal = Application("cache_demo_date") '取得appliction的值
'判斷datVal 的值,也就是要計(jì)算時(shí)間過去了沒
If datVal = "" Then
'如果是空,datVal值為當(dāng)前時(shí)間按秒加上secs定義的時(shí)間
datVal = DateAdd("s",Secs,Now)
End If
'temp1是判斷當(dāng)前時(shí)間和datVal的秒差
temp1 = DateDiff("s", Now, datVal)
'如果retVal已經(jīng)是上面函數(shù)的返回值且時(shí)間大于0
If temp1 > 0 And retVal <> "" Then
'本函數(shù)返回記錄數(shù)
DisplayCachedRecords = retVal
Response.Write "<b><font color=""green"">利用緩存讀取數(shù)據(jù)"
Response.Write " ... (" & temp1 & " 秒剩余)</font></b>"
Response.Write "<br><br>"
Else
'retVal 是空的話,就賦予DisplayRecords的值給變量temp2
Dim temp2
temp2 = DisplayRecords()
'保存到Application.------------------>重點(diǎn)
Application.Lock
Application("cache_demo") = temp2
Application("cache_demo_date") = DateAdd("s",Secs,Now)
Application.UnLock
DisplayCachedRecords = temp2
' 這里隨便寫上了記錄的緩存的過去時(shí)間,相對(duì)總秒數(shù)倒差 :
Response.Write "<b><font color=""red"">刷新緩存顯示 ..."
Response.Write "</font></b><br><br>"
End If
End Function
%>

<%
Function DisplayRecords()
Dim sql, conn, rs
sql = "SELECT id, [szd_f], [szd_t] FROM admin"
Set conn = Server.CreateObject("ADODB.Connection")
conn.Open "DRIVER={Microsoft Access Driver (*.mdb)}; DBQ="&Server.MapPath("db.mdb")
Set rs = Server.CreateObject("ADODB.Recordset")
rs.Open sql, conn, 1, 3
If Not rs.EOF Then
Dim temp
temp = "<table width=""90%"" align=""center"""
temp = temp & " border=""1"" bordercolor=""silver"""
temp = temp & " cellspacing=""2"" cellpadding=""0"">"
temp = temp & "<tr bgcolor=""#CCDDEE""><td width=""5%"""
temp = temp & ">ID</td><td>操作</td>"
temp = temp & "<td>數(shù)值</td></tr>"
While Not rs.EOF
temp = temp & "<tr><td bgcolor=""#CCDDEE"">"
temp = temp & rs("ID") & "</td><td>" & rs("szd_f")
temp = temp & "</td><td>" & rs("szd_t")
temp = temp & "</td></tr>"
rs.MoveNext
Wend
temp = temp & "</table>"
DisplayRecords = temp
Else
DisplayRecords = "Data Not Available."
End If
rs.Close
conn.Close
Set rs = Nothing
Set conn = Nothing
End Function

Function DisplayCachedRecords(Secs)
Dim retVal, datVal, temp1
retVal = Application("cache_demo")
datVal = Application("cache_demo_date")
If datVal = "" Then
datVal = DateAdd("s",Secs,Now)
End If
temp1 = DateDiff("s", Now, datVal)
If temp1 > 0 And retVal <> "" Then
DisplayCachedRecords = retVal
Response.Write "<b><font color=""green"">利用緩存讀取數(shù)據(jù)"
Response.Write " ... (" & temp1 & " 秒剩余)</font></b>"
Response.Write "<br><br>"
Else
Dim temp2
temp2 = DisplayRecords()
Application.Lock
Application("cache_demo") = temp2
Application("cache_demo_date") = DateAdd("s",Secs,Now)
Application.UnLock

DisplayCachedRecords = temp2
Response.Write "<b><font color=""red"">刷新緩存顯示 ..."
Response.Write "</font></b><br><br>"
End If
End Function
%>