LockObject (Command Interface)
Nota
Questa caratteristica verrà rimossa a partire dalla prossima versione di Microsoft SQL Server. Non utilizzare questa caratteristica in un nuovo progetto di sviluppo e modificare non appena possibile le applicazioni in cui è attualmente implementata.
The LockObject method of the Command interface locks an object to prevent multiple users from concurrently changing the object.
Applies To: clsDatabaseCommand
Sintassi
object.LockObject(ByVal LockType As OlapLockTypes, ByVal LockDescription As String)
Parametri
object
The object to lock.LockType
One of the lock types of the OlapLockTypes enumeration. For more information, see OlapLockTypes.LockDescription
A string that contains a description of the lock. This argument is available to other applications attempting to obtain a lock.
Osservazioni
Of the four types of locks defined by the OlapLockTypes enumeration, only olapLockRead and olapLockWrite apply to the Command interface.
Lock type |
Applies to |
|---|---|
olapLockRead |
Applications can read the properties of the command object from the repository but cannot make changes until the lock is released (this includes the application that created the lock). |
olapLockWrite |
The application that created the lock can modify the object's properties and save them in the repository using the Update method. Other applications cannot read the properties of the object until the lock is released. |
For more information about object locking, see LockObject.
Esempio
The following example locks a command object so that it can be modified. It then unlocks the object and updates the repository information for that object.
'Assume a command object (dsoCmd) exists.
dsoCmd.LockObect OlapLockRead, "Updating command, please wait."
' (Insert code to change command object here.)
dsoCmd.Update
dsoCmd.UnlockObject