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Specifies to which Connection object the specified Command object currently belongs.
Sets or returns a String containing the definition for a connection or a Connection object. Default is a Null object reference.
Use the ActiveConnection property to determine the Connection object over which the specified Command object will execute.
For Command objects, the ActiveConnection property is read/write. If you attempt to call the ADO Command Object Execute Method on a Command object before setting this property to an open ADO Connection Object or valid connection string, an error occurs. 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 ADO 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 ADO Parameter Object 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.
This Visual Basic example uses the ActiveConnection, ADO Command Object CommandText Property, CommandTimeout, ADO Command Object CommandType Property, ADO Field Object ActualSize Property, and ADO Parameter Object Direction Property properties to execute a stored procedure:
Public Sub ActiveConnectionX()
Dim cnn1 As ADODB.Connection
Dim cmdByRoyalty As ADODB.Command
Dim prmByRoyalty As ADODB.Parameter
Dim rstByRoyalty As ADODB.Recordset
Dim rstAuthors As ADODB.Recordset
Dim intRoyalty As Integer
Dim strAuthorID As String
Dim strCnn As String
` Define a command object for a stored procedure.
Set cnn1 = New ADODB.Connection
strCnn = "driver={SQL Server};server=srv;" & _
"uid=sa;pwd=;database=pubs"
cnn1.Open strCnn
Set cmdByRoyalty = New ADODB.Command
Set cmdByRoyalty.ActiveConnection = cnn1
cmdByRoyalty.CommandText = "byroyalty"
cmdByRoyalty.CommandType = adCmdStoredProc
cmdByRoyalty.CommandTimeout = 15
` Define the stored procedure's input parameter.
intRoyalty = Trim(InputBox( _
"Enter royalty:"))
Set prmByRoyalty = New ADODB.Parameter
prmByRoyalty.Type = adInteger
prmByRoyalty.Size = 3
prmByRoyalty.Direction = adParamInput
prmByRoyalty.Value = intRoyalty
cmdByRoyalty.Parameters.Append prmByRoyalty
` Create a recordset by executing the command.
Set rstByRoyalty = cmdByRoyalty.Execute()
` Open the Authors table to get author names for display.
Set rstAuthors = New ADODB.Recordset
rstAuthors.Open "authors", strCnn, , , adCmdTable
` Print current data in the recordset, adding
` author names from Authors table.
Debug.Print "Authors with " & intRoyalty & _
" percent royalty"
Do While Not rstByRoyalty.EOF
strAuthorID = rstByRoyalty!au_id
Debug.Print , rstByRoyalty!au_id & ", ";
rstAuthors.Filter = "au_id = '" & strAuthorID & "'"
Debug.Print rstAuthors!au_fname & " " & _
rstAuthors!au_lname
rstByRoyalty.MoveNext
Loop
rstByRoyalty.Close
rstAuthors.Close
cnn1.Close
End Sub
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Copyright © 2003 Sun Microsystems, Inc. All rights reserved.