1. Working with Database in ASP
ADO Object Model
Database Connection
Record Set
Query Examples
Update & Insertion Examples
An Application Example

2. ADO is a Microsoft technology ADO stands for ActiveX Data Objects
ADO Object Model
ADO is a Microsoft technology
ADO stands for ActiveX Data Objects
ADO is a Microsoft Active-X component
ADO is automatically installed with Microsoft IIS
ADO is a programming interface to access data in a database
ADO can be accessed from within your Active Server Pages

3. Relationships Among the Objects

4. Accessing a Database from an ASP Page
The normal way to access a database from inside an ASP page is to:
Create an ADO connection to a database
Open the database connection
Create an ADO recordset
Open the recordset
Extract the data you need from the recordset
Close the recordset
Close the connection

5. Database Connection
The easiest way to connect to a database is to use a DSN-less connection. A DSN-less connection can be used against any Microsoft SQL database on your web site.
If you have a database called "northwind " located in your SQL Server, you can connect to the database with the following ASP code:

6. Database Connection, cont.
Create a file called “ADOConnection.asp” and type in the code below
<%
dim connobj
dim connstr
connstr = "Provider=SQLOLEDB;Data Source=MyServer;Database=Northwind;User Id=NorthUser;Password=abc;"
set connobj = Server.CreateObject("ADODB.Connection")
connobj.Open (connstr)
connobj.Close
set connobj = nothing
%>
2. The ADO Connection object is used to create an open connection to a data source. Through this connection, you can access and manipulate a database.

7. Create an ADO Table Recordset
1.Create the file “ADORecordset.asp” and type in the code below
<%
dim connobj
dim connstr
dim recobj
connstr = "Provider=SQLOLEDB;Data Source=MYSERVER;Database=Northwind;User Id=NorthUser;Password=abc;"
set connobj = Server.CreateObject("ADODB.Connection")
connobj.Open (connstr)'this part create and assign the recordset.
set recobj = Server.CreateObject("ADODB.Recordset")
'open the table customer using connobj as the default connection.
recobj.Open "Customers", connobj
Response.Write("Table Customers opened.")
connobj.Close
recobj.close
set recobj = nothing
set connobj = nothing
%>

8. Extract Data from the Recordset
Create a file called “ADORecordset2.asp” and type in the code below:
<%
dim connobj
dim connstr
dim recobj
connstr = "Provider=SQLOLEDB;Data Source=MYSERVER;Database=Northwind;User Id=NorthUser;Password=abc;"
set connobj = Server.CreateObject("ADODB.Connection")
connobj.Open (connstr)
'this part create and assign the recordset.
set recobj = Server.CreateObject("ADODB.Recordset")
'open the table customer using connobj as the default connection.
recobj.Open "Customers", connobj
Response.Write("Table Customers opened.<br />")
'retrieve data

9. Extract Data from the Recordset, cont.
for each x in recobj.fields
response.write(x.name)
response.write(" = ")
response.write(x.value & "<br />")
next
connobj.Close
recobj.Close
set recobj = nothing
set connobj = nothing
%>

10. Closing Recordset and closing Connection
1.After using the recordset and connection object, it is important to properly close and destroy the objects.
2.Below is the 4 lines necessary to perform such operations.
Recobj.close
Connobj.close
Set recobj = nothing
Set connobj = nothing

11. Database Connection Examples
ODBC source connection example:
Set myDBConnection = Server.CreateObject( "ADODB.Connection" )
ConnStr = “DSN=airline db; uid=cis8490; pwd=test”
myDBConnection.open connStr
OLE connection example
Set myDBConnection = Server.CreateObject( "ADODB.Connection " )
myDBConnection.Open “PROVAIDER=SQLOLEDB; DATA SOURCE = yourserver; UID=sa; PWD=secret; DATABASE=Pubs ”
ODBC Driver For Trusted Connection security connection example
myDBConnection.Open "Driver={SQL Server};" & _           "Server=MyServerName;" & _           "Database=myDatabaseName;" & _           "Uid=;" & "Pwd=;"

12. A Recordset object: the entire set of records Opened from a base table
Recordset Objects
A Recordset object: the entire set of records
Opened from a base table
Created by the results of an executed query
Record object: an record in the recordset
Current record
Only a single record can be referenced at any time
Field object: an attribute (field) in a record
Can be referenced by the attribute name or by its position (index)