X# Runtime and VO SDK Reference
X# Runtime and SDK Reference
VO Namespace
DbServer Class
DbServer Methods
DbServer.Append Method
DbServer.AppendDB Method
DbServer.AppendDelimited Method
DbServer.AppendSDF Method
DbServer.Average Method
DbServer.BLOBDirectExport Method
DbServer.BLOBDirectGet Method
DbServer.BLOBDirectImport Method
DbServer.BLOBDirectPut Method
DbServer.BLOBExport Method
DbServer.BLOBGet Method
DbServer.BLOBImport Method
DbServer.BLOBRootGet Method
DbServer.BLOBRootLock Method
DbServer.BLOBRootPut Method
DbServer.BLOBRootUnlock Method
DbServer.ClearFilter Method
DbServer.ClearIndex Method
DbServer.ClearLocate Method
DbServer.ClearOrderScope Method
DbServer.ClearRelation Method
DbServer.ClearScope Method
DbServer.Close Method
DbServer.Commit Method
DbServer.ConstructUniqueAlias Method
DbServer.Continue Method
DbServer.CopyDB Method
DbServer.CopyDelimited Method
DbServer.CopySDF Method
DbServer.CopyStructure Method
DbServer.Count Method
DbServer.CreateIndex Method
DbServer.CreateOrder Method
DbServer.DataField Method
DbServer.Delete Method
DbServer.DeleteAll Method
DbServer.DeleteOrder Method
DbServer.Error Method
DbServer.Eval Method
DbServer.FIELDGET Method
DbServer.FieldGetBytes Method
DbServer.FieldGetFormatted Method
DbServer.FieldHyperLabel Method
DbServer.FieldInfo Method
DbServer.FieldName Method
DbServer.FieldPos Method
DbServer.FIELDPUT Method
DbServer.FieldPutBytes Method
DbServer.FieldSpec Method
DbServer.FieldStatus Method
DbServer.FieldSym Method
DbServer.FieldValidate Method
DbServer.FLOCK Method
DbServer.GetArray Method
DbServer.GetLocate Method
DbServer.GetLookupTable Method
DbServer.GoBottom Method
DbServer.GoTo Method
DbServer.GoTop Method
DbServer.INDEXKEY Method
DbServer.INDEXORD Method
DbServer.Info Method
DbServer.Join Method
DbServer.Locate Method
DbServer.LockCurrentRecord Method
DbServer.LockSelection Method
DbServer.NoIVarGet Method
DbServer.NoIVarPut Method
DbServer.Notify Method
DbServer.OrderDescend Method
DbServer.OrderInfo Method
DbServer.OrderIsUnique Method
DbServer.OrderKeyAdd Method
DbServer.OrderKeyCount Method
DbServer.OrderKeyDel Method
DbServer.OrderKeyGoTo Method
DbServer.OrderKeyNo Method
DbServer.OrderScope Method
DbServer.OrderSkipUnique Method
DbServer.Pack Method
DbServer.RDDINFO Method
DbServer.Recall Method
DbServer.RecallAll Method
DbServer.RecordInfo Method
DbServer.Refresh Method
DbServer.Reindex Method
DbServer.Relation Method
DbServer.Replace Method
DbServer.ResetNotification Method
DbServer.RLOCK Method
DbServer.RLockVerify Method
DbServer.Seek Method
DbServer.SELECT Method
DbServer.SetDataField Method
DbServer.SetFilter Method
DbServer.SetIndex Method
DbServer.SetOrder Method
DbServer.SetOrderCondition Method
DbServer.SetRelation Method
DbServer.SetSelectiveRelation Method
DbServer.Skip Method
DbServer.Sort Method
DbServer.Sum Method
DbServer.SuspendNotification Method
DbServer.Total Method
DbServer.UnLock Method
DbServer.Update Method
DbServer.Zap Method
Click or drag to resize

DbServer.Error Method

X#
Provide a method for handling error conditions raised during database processing.

Namespace:  VO
Assembly:  VORDDClasses (in VORDDClasses.dll) Version: 2.21
Syntax
Copy
 VIRTUAL METHOD Error(
	oError,
	symMethod
) AS USUAL CLIPPER
Request Example View Source

Parameters

oError (Optional)
Type: Usual
An Error object describing the error condition.
symMethod (Optional)
Type: Usual
The symbolic name of the method that originated the error.

Return Value

Type: Usual
Remarks
Tip Tip
This is an event handler and is automatically called by other methods; the developer does not normally need to call the DBServer:Error() method, but might want to replace or amend it.
All methods of the DBServer trap serious errors with a recover statement and send them to this method. Ordinary failures, such as locking conflicts or record-not-found, do not raise error conditions; they are simply indicated through failure return values. The standard Error() handling method fills in some more information about the errors and about the DBServer object that originates the error, sets the status value for the server object, and passes the problem to its client, if there is one, in its standard Error() handling method. If there is no client who wants to deal with the problem, the method passes it up the call stack by issuing a BREAK with the same Error object.
Tip Tip
If an error comes in while one is being handled, the Error() method immediately breaks.
Examples
The Skip() method uses the Error() method like this:
X#
Copy
1METHOD Skip(n) CLASS DBServer
2LOCAL oError AS USUAL
3BEGIN SEQUENCE
4RETURN (wWorkarea)->(VODBSkip(...))
5RECOVER USING oError
6SELF:Error(oError,#Skip)
7RETURN FALSE
8END SEQUENCE
See Also