Navigation: ABC Library Reference > FileDropClass > FileDropClass Methods >====== ValidateRecord (a virtual to validate records)  ====== |    |
ValidateRecord, VIRTUAL
The ValidateRecord method is a virtual called when the FileDropClass object fills its display QUEUE. ValidateRecord returns a value indicating whether to include the current record in the displayed list. Thus ValidateRecord provides a filtering mechanism in addition to the ViewManager.SetFilter method. Valid return values include:
| Record:OK | includes the record | |
| Record:OutOfRange | excludes the record | |
| Record:Filtered | excludes the record |
Implementation:
The ResetQueue method calls the ValidateRecord method. The ValidateRecord method calls the PARENT.ValidateRecord method (ViewManager.ValidateRecord).
Return value EQUATEs are declared in \LIBSRC\ABFILE.EQU:
Record:OK EQUATE(0) !Record passes range and filter
Record:OutOfRange EQUATE(1) !Record fails range test
Record:Filtered EQUATE(2) !Record fails filter tests
Return Data Type: BYTE
Example:
MyFileDropClass.ResetQueue PROCEDURE
i LONG
CODE
SETCURSOR(CURSOR:Wait)
FREE(SELF.ListQueue)
SELF.ApplyRange
SELF.Reset
LOOP UNTIL SELF.Next()
IF SELF.ValidateRecord()=Record:OK !Validate Records
SELF.SetQueueRecord
ADD(SELF.ListQueue)
ASSERT(~ERRORCODE())
IF SELF.UpdateFields.Equal()
i=RECORDS(SELF.ListQueue)
END
END
END
!procedure code
See Also: ResetQueue, ViewManager.SetFilter, ViewManager.ValidateRecord