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BtServer Class
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<< Click to Display Table of Contents >> BtServer Class |
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Purpose
Class to use Btrieve data in combination with VO's DataWindow/Databrowser classes
Prototype
CLASS BtServer INHERIT DataServer
Access
| Bof | Is Server at BOF |
| ClientId | Get the client Id that was used to open this table |
| CurrStruct | Returns the current active structure definition of the file |
| DbStruct | Return the structure of the table |
| Deleted | Is the current record deleted ? |
| Eof | Is row pointer beyond the end of file |
| ErrInfo | An Error object identifying the error condition after the last operation |
| Fcount | Get number of fields in the current table |
| Filter | A string representing the current active filter. |
| FixedRecSize | A numeric value representing the length of the fixed portion of the record |
| Found | Was the last seek succesfull |
| MaxRecSize | A numeric value representing the (maximum) record length of the table in bytes |
| Name | Name of the BtServer Class |
| OrderBottomScope | Bottom boundary of scope |
| OrderKeyNo | Current position in index |
| OrderKeyVal | Return the key values of the active order on the current record |
| OrderTopScope | Top boundary of scope |
| PercentPosition | Relative position in current order/file |
| ReadOnly | Is the Server opened in Read only mode ? |
| RecCount | Number of records in the server table |
| Recno | Current record number |
| RecSize | Current record length |
| Shared | A logical value indicating whether the server is sharable or exclusive. |
| Table | Object reference to the underlying BtTable object |
| Used | A logical value indicating whether the server is currently open. |
Assign
| OrderBottomScope | Bottom boundary of scope |
| OrderKeyNo | Current position in index |
| OrderTopScope | Top boundary of scope |
| PercentPosition | Relative position in current order/file |
Method
| AddStruct() | Add alternative structure for open table |
| Append() | Append a blank record to the table |
| ClearFilter() | Clear filter condition |
| ClearOrderScope() | Clear the scope |
| ClearOwner() | Remove owner name |
| ClearRelation() | Clear all active relations |
| Close() | Close the table |
| Commit() | Write all changes to the current record to disk |
| CopyDb() | Copy contents of Btrieve server to DBF File |
| CopyFile() | Copy contents of Btrieve server to new Btrieve File |
| CreateIndex() | Create a new index |
| Delete() | Delete the current record |
| DeleteIndex() | Drop an index of the table |
| Error() | Handle error conditions raised during database processing. |
| FieldGet() | Get field value |
| FieldGetFormatted() | Return the formatted contents of a specified field |
| FieldLength() | Return the btrieve field length for the specified field |
| FieldName() | Name of a specified field as a string. |
| FieldOffset() | Return the btrieve field offset for the specified field |
| FieldPos() | Return the position of a specified field |
| FieldPut() | Set the field value |
| FieldSym() | Return the name of a specified field as a symbol |
| FieldType() | Return the btrieve field type for the specified field |
| FLock() | Stub method. |
| GoBottom() | Position the data server at the last record. |
| Goto() | Position the data server at a specified record number. |
| GoTop() | Position the data server at the first record. |
| INDEXKEY() | Return the key expression of the active order |
| INDEXORD() | Return the ordinal position of the controlling order in the order list. |
| Init() | Constructor |
| NoIVarGet() | Read field value |
| NoIVarPut() | Write field value |
| Notify() | An event handler that responds to events of this server |
| OrderInfo() | Information about orders and indexes |
| OrderKeyGoto() | Goto a specific order key position |
| OrderKeyNo() | Retrieve (approximate) logical record number for a specific index |
| OrderScope() | Get/Set the boundaries for scoping key values in the controlling order. |
| Recall() | Recall the current record |
| Refresh() | Reread the current record |
| Relation() | Return the linking expression of a specified relation. |
| ResetNotification() | Resume the broadcasting of Notify messages |
| RLock() | Try to lock a record in the table |
| Seek() | Find a record using its key value |
| SeekEq() | Find a record with an exact match to the given key(s) |
| SeekGe() | Find a record with a key value greater then or equal to the key(s) given |
| SeekGt() | Find a record with a key value greater than the key given |
| SeekLe() | Find a record with a key value smaller or equal to than the key given |
| SeekLt() | Find a record with a key value smaller than the key given |
| SetDataField() | Allows to override default datafields |
| SetFilter() | Method to set a filter on the server |
| SetOrder() | Change the index order |
| SetOwner() | Assign Owner name to Btrieve file |
| SetRelation() | Set a relation from this server to the child server. |
| SetSelectiveRelation() | Set a selective relation from this server to the child server |
| SetStruct() | Activate alternative structure for open table |
| Skip() | Move the record pointer forward or backward |
| SuspendNotification() | Suspend the broadcasting of Notify messages |
| Unlock() | Unlock a record, or all records in the server |
| Update() | Write all changes to the current record to disk |
See Also