CommandTimeout does not inherit from Connection timeout (195489)

SYMPTOMS

If a Connection's CommandTimeout property is set to some value and a Command object is associated to that Connection, the Command object does not pickup the Connection's CommandTimeout setting. Instead, the Command object's CommandTimeout is set to its default setting or whatever it was set to prior to being associated with the Connection.

CAUSE

ActiveX Data Objects (ADO) does not practice inheritance. Due to the stand alone capability of its objects, a Command object can be associated with more than one Connection object. The one exception is the CursorLocation property.

MORE INFORMATION

Steps to reproduce the behavior

Start a Visual Basic Project.
Set a Project Reference to the Microsoft ActiveX Data Objects Library.

Paste the following code in the Form_Load() event of the default form. You need to modify the connection string so that it references a valid datasouce.

      Dim cnn As New ADODB.Connection
      Dim cnstring As String
      cnstring = "Provider = SQLOLEDB;" & _
                 "DATA SOURCE =<server name>;" & _
                 "USER ID = <user id>;" & _
                 "PASSWORD =<password>;" & _
                 "INITIAL CATALOG = <database>;"
      cnn.CommandTimeout = 0
      cnn.Open cnstring
      Dim cmd As New ADODB.Command
      cmd.ActiveConnection = cnn
      Debug.Print "Timeout on Connection: " & cnn.CommandTimeout
      Debug.Print "Timeout on Command:  " & cmd.CommandTimeout

Run the form. You should see that the timeout for the Connection object is set to zero (0) as expected, while the timeout for the Command object is 30 seconds (which is the default).