Objek Rekaman ADO
Contoh
Contoh ini menunjukkan cara menggunakan metode GetRows.
Objek Rekaman
Objek ADO Recordset digunakan untuk menyimpan sekumpulan record dari tabel database. Sebuah objek Recordset terdiri dari record dan kolom (fields).
Di ADO, objek ini adalah yang paling penting dan paling sering digunakan untuk memanipulasi data dari database.
ID Prog
set objRecordset=Server.CreateObject("ADODB.recordset")
Saat Anda pertama kali membuka Recordset, penunjuk record saat ini akan menunjuk ke record pertama dan properti BOF dan EOF adalah False. Jika tidak ada catatan, properti BOF dan EOF adalah True.
Objek Recordset dapat mendukung dua jenis pembaruan:
- Pembaruan segera - semua perubahan ditulis segera ke database setelah Anda memanggil metode Pembaruan.
- Pembaruan batch - penyedia akan menyimpan beberapa perubahan dan mengirimkannya ke database dengan metode UpdateBatch.
Di ADO ada 4 jenis kursor berbeda yang ditentukan:
- Kursor dinamis - Memungkinkan Anda melihat penambahan, perubahan, dan penghapusan oleh pengguna lain.
- Kursor keyset - Seperti kursor dinamis, kecuali bahwa Anda tidak dapat melihat penambahan oleh pengguna lain, dan mencegah akses ke catatan yang telah dihapus pengguna lain. Perubahan data oleh pengguna lain akan tetap terlihat.
- Kursor statis - Menyediakan salinan statis dari kumpulan rekaman untuk Anda gunakan untuk menemukan data atau membuat laporan. Penambahan, perubahan, atau penghapusan oleh pengguna lain tidak akan terlihat. Ini adalah satu-satunya jenis kursor yang diizinkan saat Anda membuka objek Recordset sisi klien.
- Forward-only cursor - Memungkinkan Anda untuk hanya menggulir maju melalui Recordset. Penambahan, perubahan, atau penghapusan oleh pengguna lain tidak akan terlihat.
Jenis kursor dapat diatur oleh properti CursorType atau parameter CursorType dalam metode Open.
Catatan: Tidak semua penyedia mendukung semua metode atau properti dari objek Recordset.
Properti
| Property | Description |
|---|---|
| AbsolutePage | Sets or returns a value that specifies the page number in the Recordset object |
| AbsolutePosition | Sets or returns a value that specifies the ordinal position of the current record in the Recordset object |
| ActiveCommand | Returns the Command object associated with the Recordset |
| ActiveConnection | Sets or returns a definition for a connection if the connection is closed, or the current Connection object if the connection is open |
| BOF | Returns true if the current record position is before the first record, otherwise false |
| Bookmark | Sets or returns a bookmark. The bookmark saves the position of the current record |
| CacheSize | Sets or returns the number of records that can be cached |
| CursorLocation | Sets or returns the location of the cursor service |
| CursorType | Sets or returns the cursor type of a Recordset object |
| DataMember | Sets or returns the name of the data member that will be retrieved from the object referenced by the DataSource property |
| DataSource | Specifies an object containing data to be represented as a Recordset object |
| EditMode | Returns the editing status of the current record |
| EOF | Returns true if the current record position is after the last record, otherwise false |
| Filter | Sets or returns a filter for the data in a Recordset object |
| Index | Sets or returns the name of the current index for a Recordset object |
| LockType | Sets or returns a value that specifies the type of locking when editing a record in a Recordset |
| MarshalOptions | Sets or returns a value that specifies which records are to be returned to the server |
| MaxRecords | Sets or returns the maximum number of records to return to a Recordset object from a query |
| PageCount | Returns the number of pages with data in a Recordset object |
| PageSize | Sets or returns the maximum number of records allowed on a single page of a Recordset object |
| RecordCount | Returns the number of records in a Recordset object |
| Sort | Sets or returns the field names in the Recordset to sort on |
| Source | Sets a string value or a Command object reference, or returns a String value that indicates the data source of the Recordset object |
| State | Returns a value that describes if the Recordset object is open, closed, connecting, executing or retrieving data |
| Status | Returns the status of the current record with regard to batch updates or other bulk operations |
| StayInSync | Sets or returns whether the reference to the child records will change when the parent record position changes |
Metode
| Method | Description |
|---|---|
| AddNew | Creates a new record |
| Cancel | Cancels an execution |
| CancelBatch | Cancels a batch update |
| CancelUpdate | Cancels changes made to a record of a Recordset object |
| Clone | Creates a duplicate of an existing Recordset |
| Close | Closes a Recordset |
| CompareBookmarks | Compares two bookmarks |
| Delete | Deletes a record or a group of records |
| Find | Searches for a record in a Recordset that satisfies a specified criteria |
| GetRows | Copies multiple records from a Recordset object into a two-dimensional array |
| GetString | Returns a Recordset as a string |
| Move | Moves the record pointer in a Recordset object |
| MoveFirst | Moves the record pointer to the first record |
| MoveLast | Moves the record pointer to the last record |
| MoveNext | Moves the record pointer to the next record |
| MovePrevious | Moves the record pointer to the previous record |
| NextRecordset | Clears the current Recordset object and returns the next Recordset object by looping through a series of commands |
| Open | Opens a database element that gives you access to records in a table, the results of a query, or to a saved Recordset |
| Requery | Updates the data in a Recordset by re-executing the query that made the original Recordset |
| Resync | Refreshes the data in the current Recordset from the original database |
| Save | Saves a Recordset object to a file or a Stream object |
| Seek | Searches the index of a Recordset to find a record that matches the specified values |
| Supports | Returns a boolean value that defines whether or not a Recordset object supports a specific type of functionality |
| Update | Saves all changes made to a single record in a Recordset object |
| UpdateBatch | Saves all changes in a Recordset to the database. Used when working in batch update mode |
Acara
Catatan: Anda tidak dapat menangani peristiwa menggunakan VBScript atau JScript (hanya bahasa Visual Basic, Visual C++, dan Visual J++ yang dapat menangani peristiwa).
| Event | Description |
|---|---|
| EndOfRecordset | Triggered when you try to move to a record after the last record |
| FetchComplete | Triggered after all records in an asynchronous operation have been fetched |
| FetchProgress | Triggered periodically in an asynchronous operation, to state how many more records that have been fetched |
| FieldChangeComplete | Triggered after the value of a Field object change |
| MoveComplete | Triggered after the current position in the Recordset has changed |
| RecordChangeComplete | Triggered after a record has changed |
| RecordsetChangeComplete | Triggered after the Recordset has changed |
| WillChangeField | Triggered before the value of a Field object change |
| WillChangeRecord | Triggered before a record change |
| WillChangeRecordset | Triggered before a Recordset change |
| WillMove | Triggered before the current position in the Recordset changes |
Koleksi
| Collection | Description |
|---|---|
| Fields | Indicates the number of Field objects in the Recordset object |
| Properties | Contains all the Property objects in the Recordset object |
Properti Koleksi Fields
| Property | Description |
|---|---|
| Count | Returns the number of items in the fields collection. Starts at zero.
Example: countfields=rs.Fields.Count |
| Item(named_item/number) | Returns a specified item in the fields collection.
Example: itemfields=rs.Fields.Item(1) |
Properti Koleksi Properti
| Property | Description |
|---|---|
| Count | Returns the number of items in the properties collection. Starts at zero.
Example: countprop=rs.Properties.Count |
| Item(named_item/number) | Returns a specified item in the properties collection.
Example: itemprop = rs.Properties.Item(1) |