85 lines
4.5 KiB
HTML
85 lines
4.5 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">
|
||
<HTML>
|
||
<HEAD>
|
||
<META HTTP-EQUIV="Content-Type" Content="text/html; charset=Windows-1252">
|
||
<TITLE>Database Access Component</TITLE>
|
||
<SCRIPT LANGUAGE="JavaScript">
|
||
<!--
|
||
TempString = navigator.appVersion
|
||
if (navigator.appName == "Microsoft Internet Explorer"){
|
||
// Check to see if browser is Microsoft
|
||
if (TempString.indexOf ("4.") >= 0){
|
||
// Check to see if it is IE 4
|
||
document.writeln('<link rel="stylesheet" type="text/css" href="/iishelp/common/coua.css">');
|
||
}
|
||
else {
|
||
document.writeln('<link rel="stylesheet" type="text/css" href="/iishelp/common/cocss.css">');
|
||
}
|
||
}
|
||
else if (navigator.appName == "Netscape") {
|
||
// Check to see if browser is Netscape
|
||
document.writeln('<link rel="stylesheet" type="text/css" href="/iishelp/common/coua.css">');
|
||
}
|
||
else
|
||
document.writeln('<link rel="stylesheet" type="text/css" href="/iishelp/common/cocss.css">');
|
||
//-->
|
||
</script>
|
||
<SCRIPT LANGUAGE="VBScript">
|
||
<!--
|
||
Sub Window_OnLoad()
|
||
Dim frmContents
|
||
On Error Resume Next
|
||
If Not Parent Is Nothing Then
|
||
Set frmContents = Parent.Contents
|
||
If Not frmContents Is Nothing Then
|
||
frmContents.Window.TOCSynch_Click
|
||
End If
|
||
End If
|
||
End Sub
|
||
//--></SCRIPT><META NAME="DESCRIPTION" CONTENT="Internet Information Services reference information">
|
||
<META HTTP-EQUIV="PICS-Label" CONTENT='(PICS-1.1 "<http://www.rsac.org/ratingsv01.html>" l comment "RSACi North America Server" by "inet@microsoft.com <mailto:inet@microsoft.com>" r (n 0 s 0 v 0 l 0))'>
|
||
<META NAME="MS.LOCALE" CONTENT="EN-US">
|
||
<META NAME="MS-IT-LOC" Content="Internet Information Services">
|
||
</HEAD>
|
||
|
||
<BODY BGCOLOR="#FFFFFF" TEXT="#000000">
|
||
|
||
<H1><A NAME="_database_access_component"></A><SUP></SUP>Database Access Component</H1>
|
||
|
||
<P>The Database Access Components (DAC) provide access to information stored in databases or other tabular data structures. DAC includes ActiveX<sup>®</sup> Data Objects (ADO), Open Database Connectivity (ODBC), and Object Linking and Embedding for Databases (OLEDB). ASP can use these components to easily integrate information from a variety of database sources, like Microsoft<66> Access, SQL, Excel and other technologies. Providing access to multiple types of data storage is called Universal Data Access.</P>
|
||
|
||
<P>For information about developing applications that use Universal Data Access see <a HREF="http://www.microsoft.com/isapi/redir.dll?prd=mdac" target=_blank><b><span class=le>Universal Data Access Web Site</span></b></a> or the Microsoft Data Access SDK in the Platform SDK.</P>
|
||
|
||
<P>ADO is the most commonly used Data Access Component because of its ease of use. ADO has a library of seven objects with methods and properties to help you access data. Each object can be created using Server.CreateObject:</P>
|
||
|
||
<PRE><CODE><%
|
||
' Create two of the seven ADO objects.
|
||
Set conn = Server.CreateObject("ADODB.Connection")
|
||
Set rs = Server.CreateObject("ADODB.RecordSet")
|
||
%></CODE></PRE>
|
||
|
||
<P><span class=le><B>Note</B></span></P>
|
||
|
||
<P>ADO uses a lot of constants that are pre-defined in a type library to keep the user from having to remember specific values. To use the constants specified in the ADO Reference, you must either include a file that contains information about the ADO constants, or include a reference to the ADO type library in your Global.asa file. The following example demonstrates using the ADO type library to access constants.</P>
|
||
|
||
<P>For example, to use this line in an ASP file, you would have to remember that 3 indicates Open Static and Lock Optimistic:</P>
|
||
|
||
<PRE><CODE><% rs.Open "Customers", Conn, 3, 3 %>
|
||
</CODE></PRE>
|
||
|
||
<P>If you include the type library for ADO, you could use this code:</P>
|
||
|
||
<PRE><CODE><% rs.Open "Customers", Conn, adOpenStatic, adLockOptimistic %>
|
||
</CODE></PRE>
|
||
|
||
<P>To include the following type library in your application, put this declaration in the Global.asa file.</P>
|
||
|
||
<PRE><CODE><!-- METADATA TYPE="typelib" FILE="c:\program files\common files\system\ado\msado20.dll"-->
|
||
</CODE></PRE>
|
||
|
||
<P>For more information about type libraries and constants, see <A HREF="iiwavar.htm">Using Variables and Constants</A>. For more information about data access, see <A HREF="iiwadata.htm">Accessing a Data Source</A> and <A HREF="/iishelp/iis/htm/asp/eadg3l80.htm">Accessing Data with ASP</A>.</P>
|
||
<hr class="iis" size="1">
|
||
<p align="center"><em><a href="../../../common/colegal.htm">© 1997-2001 Microsoft Corporation. All rights reserved.</a></em></p>
|
||
</BODY>
|
||
</HTML>
|