Returns whether you have gone above the first
record of the record set. (Call this function before scrolling from
record to record.)
|
Function |
Group |
Execution |
Windows |
Embedded |
Thin Client |
| ODBCIsBOF
|
ODBC |
Synchronous |
Supported |
Not
supported |
Executed on
Server |
Syntax
ODBCIsBOF(numHandler)
- numHandler
- The handler returned by the
ODBCOpen function.
Returned value
| 0 |
Record
found |
|
non-zero |
Record
set contains no records or you move backward, above the first
record |
You also can use this function along with the
ODBCIsEOF function to
determine whether the record set contains any records or is empty.
Immediately after calling the
ODBCQuery function, and if the record set contains no
records, ODBCIsBOF returns
non-zero. When you open a record set with at least one record, the
first record is the current record and ODBCIsBOF returns a zero (0). If the first record is the current record,
and you call ODBCMovePrev, ODBCIsBOF will subsequently return a
non-zero.
Examples
|
Tag Name |
Expression |
|
Tag |
ODBCIsBOF( 1 )
|