DbServer Methods (Typed)

DbServer.Append Method

DbServer.AppendDB Method (Typed)

DbServer.AppendDelimited Method (Typed)

DbServer.AppendSDF Method (Typed)

DbServer.Average Method (Typed)

DbServer.BLOBDirectExport Method

DbServer.BLOBDirectGet Method (Typed)

DbServer.BLOBDirectImport Method

DbServer.BLOBDirectPut Method (Typed)

DbServer.BLOBExport Method

DbServer.BLOBGet Method (Typed)

DbServer.BLOBImport Method (Typed)

DbServer.BLOBRootGet Method (Typed)

DbServer.BLOBRootLock Method (Typed)

DbServer.BLOBRootPut Method (Typed)

DbServer.BLOBRootUnlock Method (Typed)

DbServer.ClearFilter Method (Typed)

DbServer.ClearIndex Method (Typed)

DbServer.ClearLocate Method (Typed)

DbServer.ClearOrderScope Method (Typed)

DbServer.ClearRelation Method (Typed)

DbServer.ClearScope Method (Typed)

DbServer.Close Method (Typed)

DbServer.Commit Method (Typed)

DbServer.ConstructUniqueAlias Method (Typed)

DbServer.Continue Method (Typed)

DbServer.CopyDB Method (Typed)

DbServer.CopyDelimited Method (Typed)

DbServer.CopySDF Method (Typed)

DbServer.CopyStructure Method

DbServer.Count Method (Typed)

DbServer.CreateIndex Method (Typed)

DbServer.CreateOrder Method (Typed)

DbServer.DataField Method (Typed)

DbServer.Delete Method

DbServer.DeleteAll Method (Typed)

DbServer.DeleteOrder Method (Typed)

DbServer.Error Method (Typed)

DbServer.Eval Method (Typed)

DbServer.FieldGet Method (Typed)

DbServer.FieldGetBytes Method (Typed)

DbServer.FieldGetFormatted Method (Typed)

DbServer.FieldHyperLabel Method (Typed)

DbServer.FieldInfo Method (Typed)

DbServer.FieldName Method (Typed)

DbServer.FieldPos Method (Typed)

DbServer.FieldPut Method (Typed)

DbServer.FieldPutBytes Method (Typed)

DbServer.FieldSpec Method (Typed)

DbServer.FieldStatus Method (Typed)

DbServer.FieldSym Method (Typed)

DbServer.FieldValidate Method (Typed)

DbServer.FLock Method (Typed)

DbServer.GetArray Method (Typed)

DbServer.GetLocate Method (Typed)

DbServer.GetLookupTable Method (Typed)

DbServer.GoBottom Method (Typed)

DbServer.GoTo Method (Typed)

DbServer.GoTop Method (Typed)

DbServer.IndexKey Method (Typed)

DbServer.IndexOrd Method (Typed)

DbServer.Info Method (Typed)

DbServer.Join Method (Typed)

DbServer.Locate Method (Typed)

DbServer.LockCurrentRecord Method (Typed)

DbServer.LockSelection Method (Typed)

DbServer.NoIVarGet Method (Typed)

DbServer.NoIVarPut Method (Typed)

DbServer.Notify Method (Typed)

DbServer.OrderDescend Method

DbServer.OrderInfo Method (Typed)

DbServer.OrderIsUnique Method

DbServer.OrderKeyAdd Method

DbServer.OrderKeyCount Method

DbServer.OrderKeyDel Method

DbServer.OrderKeyGoTo Method (Typed)

DbServer.OrderKeyNo Method

DbServer.OrderScope Method (Typed)

DbServer.OrderSkipUnique Method (Typed)

DbServer.Pack Method (Typed)

DbServer.RddInfo Method (Typed)

DbServer.Recall Method (Typed)

DbServer.RecallAll Method (Typed)

DbServer.RecordInfo Method (Typed)

DbServer.Refresh Method (Typed)

DbServer.Reindex Method (Typed)

DbServer.Relation Method (Typed)

DbServer.Replace Method (Typed)

DbServer.ResetNotification Method (Typed)

DbServer.RLock Method (Typed)

DbServer.RLockVerify Method (Typed)

DbServer.Seek Method

DbServer.Select Method (Typed)

DbServer.SetDataField Method (Typed)

DbServer.SetFilter Method (Typed)

DbServer.SetIndex Method

DbServer.SetOrder Method

DbServer.SetOrderCondition Method (Typed)

DbServer.SetRelation Method (Typed)

DbServer.SetSelectiveRelation Method (Typed)

DbServer.Skip Method (Typed)

DbServer.Sort Method

DbServer.Sum Method (Typed)

DbServer.SuspendNotification Method (Typed)

DbServer.Total Method (Typed)

DbServer.UnLock Method (Typed)

DbServer.Update Method

DbServer.Zap Method (Typed)

DbServer.Error Method (Typed)

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

Namespace: XSharp.VO.SDK
Assembly: XSharp.VORDDClasses (in XSharp.VORDDClasses.dll) Version: 2.21

Syntax

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 VIRTUAL METHOD Error(
	oError AS Error,
	symMethod AS SYMBOL
) AS USUAL

public virtual Usual Error(
	Error oError,
	Symbol symMethod
)

Request Example View Source

Parameters

oError: Type: Error
An Error object describing the error condition.
symMethod: Type: Symbol
The symbolic name of the method that originated the error.

Return Value

Type: Usual

Remarks

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
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:

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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

Reference

DbServer Class

XSharp.VO.SDK Namespace