ActiveConnection Property (ADO)
Sets or returns a String value that contains a definition for a connection if the connection is closed, or a Variant containing the current Connection object if the connection is open. Default is a null object reference. See the ConnectionString property.
Use the ActiveConnection property to determine the Connection object over which the specified Command object will execute or the specified Recordset will be opened.
For Command objects, the ActiveConnection property is read/write.
If you attempt to call the Execute method on a Command object before setting this property to an open Connection object or valid connection string, an error occurs.
If a Connection object is assigned to the ActiveConnection property, the object must be opened. Assigning a closed Connection object causes an error.
Microsoft Visual Basic Setting the ActiveConnection property to Nothing disassociates the Command object from the current Connection and causes the provider to release any associated resources on the data source. You can then associate the Command object with the same or another Connection object. Some providers allow you to change the property setting from one Connection to another, without having to first set the property to Nothing.
If the Parameters collection of the Command object contains parameters supplied by the provider, the collection is cleared if you set the ActiveConnection property to Nothing or to another Connection object. If you manually create Parameter objects and use them to fill the Parameters collection of the Command object, setting the ActiveConnection property to Nothing or to another Connection object leaves the Parameters collection intact.
Closing the Connection object with which a Command object is associated sets the ActiveConnection property to Nothing. Setting this property to a closed Connection object generates an error.
For open Recordset objects or for Recordset objects whose Source property is set to a valid Command object, the ActiveConnection property is read-only. Otherwise, it is read/write.
You can set this property to a valid Connection object or to a valid connection string. In this case, the provider creates a new Connection object using this definition and opens the connection. Additionally, the provider may set this property to the new Connection object to give you a way to access the Connection object for extended error information or to execute other commands.
If you use the ActiveConnection argument of the Open method to open a Recordset object, the ActiveConnection property will inherit the value of the argument.
If you set the Source property of the Recordset object to a valid Command object variable, the ActiveConnection property of the Recordset inherits the setting of the Command object's ActiveConnection property.
Remote Data Service Usage When used on a client-side Recordset object, this property can be set only to a connection string or (in Microsoft Visual Basic or Visual Basic, Scripting Edition) to Nothing.
This property is read/write when the Record object is closed, and may contain a connection string or reference to an open Connection object. This property is read-only when the Record object is open, and contains a reference to an open Connection object.
A Connection object is created implicitly when the Record object is opened from a URL. Open the Record with an existing, open Connection object by assigning the Connection object to this property, or using the Connection object as a parameter in the Open method call. If the Record is opened from an existing Record or Recordset, then it is automatically associated with that Record or Recordset object's Connection object.