The Microsoft Active Directory Service Interfaces (ADSI) Provider allows ADO to connect to heterogeneous directory services through ADSI. This gives ADO applications read-only access to the Microsoft Windows NT® 4.0 and Microsoft Windows 2000 directory services, in addition to any LDAP-compliant directory service and Novell Directory Services. ADSI itself is based on a provider model, so if there is a new provider giving access to another directory, the ADO application will be able to access it seamlessly. The ADSI provider is free-threaded and unicode enabled.
Connection String Parameters
To connect to this provider, set the Provider argument of the ConnectionString property to:
ADSDSOObject
Reading the Provider property will return this string as well.
Typical Connection String
A typical connection string for this provider is:
"Provider=ADSDSOObject;User ID=userName;Password=userPassword;"
Consisting of these keywords:
| Keyword | Description |
| Provider | Specifies the OLE DB Provider for Microsoft Active Directory Service. |
| User ID | Specifies the user name. If this keyword is omitted, then the current logon is used. |
| Password | Specifies the user password. If this keyword is omitted, then the current logon is used. |
Command Text
A four-part command text string is recognized by the provider in the following syntax:
"Root; Filter; Attributes[; Scope]"
| Value | Description |
| Root | Indicates the ADsPath object from which to start the search (that is, the root of the search). |
| Filter | Indicates the search filter in the RFC 960 format. |
| Attributes | Indicates a comma-delimited list of attributes to be returned. |
| Scope | Optional. A String that specifies the scope of the search. Can be one of the following:
|
For example:
"<LDAP://DC=ArcadiaBay,DC=COM>;(objectClass=*);sn, givenName; subtree"
The provider also supports SQL SELECT for command text. For example:
"SELECT title, telephoneNumber From 'LDAP://DC=Microsoft, DC=COM' WHERE objectClass='user' AND objectCategory='Person'"
The provider does not accept stored procedure calls or simple table names (for example, the CommandType property will always be adCmdText). See the Active Directory Service Interfaces documentation for a more complete description of the command text elements.
Recordset Behavior
The following tables list the features available on a Recordset object opened with this provider. Only the Static cursor type (adOpenStatic) is available.
For more detailed information about Recordset behavior for your provider configuration, run the Supports method and enumerate the Properties collection of the Recordset to determine whether provider-specific dynamic properties are present.
Availability of standard ADO Recordset properties:
| Property | Availability |
| AbsolutePage | read/write |
| AbsolutePosition | read/write |
| ActiveConnection | read-only |
| BOF | read-only |
| Bookmark | read/write |
| CacheSize | read/write |
| CursorLocation | always adUseServer |
| CursorType | always adOpenStatic |
| EditMode | always adEditNone |
| EOF | read-only |
| Filter | read/write |
| LockType | read/write |
| MarshalOptions | not available |
| MaxRecords | read/write |
| PageCount | read-only |
| PageSize | read/write |
| RecordCount | read-only |
| Source | read/write |
| State | read-only |
| Status | read-only |
Availability of standard ADO Recordset methods:
| Method | Available? |
| AddNew | No |
| Cancel | No |
| CancelBatch | No |
| CancelUpdate | No |
| Clone | Yes |
| Close | Yes |
| Delete | No |
| GetRows | Yes |
| Move | Yes |
| MoveFirst | Yes |
| MoveLast | Yes |
| MoveNext | Yes |
| MovePrevious | Yes |
| NextRecordset | Yes |
| Open | Yes |
| Requery | Yes |
| Resync | Yes |
| Supports | Yes |
| Update | No |
| UpdateBatch | No |
See Also For more general information about ADSI and the specifics of the provider, please refer to the Active Directory Service Interfaces documentation or visit the ADSI Web page.