ADO Open Method
Definition and Usage
The Open method can open a connection to a data source. When the connection is open, you can execute commands on the data source.
Syntax
connection.Open connectionstring,userID,password,options
| parameters | Description |
|---|---|
| connectionstring |
Optional. A string value containing information about the connection. The string is composed of a series of parameter=value statements separated by semicolons. For details on valid settings, please refer to ConnectionString property. |
| userID | Optional. A string value containing the user name to be used when establishing the connection. |
| password | Optional. A string value containing the password to be used when establishing the connection. |
| options | Optional. A ConnectOptionEnum value determines whether this method should return after (synchronously) or before (asynchronously) the connection is established. |
instance
DSN-less connection:
<%
set conn=Server.CreateObject("ADODB.Connection")
conn.Provider="Microsoft.Jet.OLEDB.4.0"
conn.Open "c:/webdata/northwind.mdb"
%>
DSN-less connection with userID and password (write the conn.open statement on a single line):
<%
set conn=Server.CreateObject("ADODB.Connection")
conn.Open "Provider=Microsoft.Jet.OLEDB.4.0;
data source=c:/webdata/northwind.mdb;
userID=xxx;
password=yyy"
%>
ODBC Database Connection:
<%
set conn=Server.CreateObject("ADODB.Connection")
conn.Open "northwind"
%>
ConnectOptionEnum
| Constant | Value | Description |
|---|---|---|
| adConnectUnspecified | -1 | Default value. Synchronously open the connection. |
| adAsyncConnect | 16 | Asynchronously open the connection. The ConnectComplete event can be used to determine when the connection is available. |
