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DbServer.Eval Method

Evaluate a code block for each record matching a scope and condition.  If neither conditions nor scope is passed to the method, it is subject to the general server scope.

Namespace:  VO
Assembly:  VORDDClasses (in VORDDClasses.dll) Version: 2.5
Syntax
 VIRTUAL METHOD Eval(
	cbBlock AS USUAL,
	cbForBlock AS USUAL,
	cbWhileBlock AS USUAL,
	uScope AS USUAL
) AS USUAL

Parameters

cbBlock
Type: Usual
The code block to execute for each record processed.
cbForBlock
Type: Usual
The condition evaluated for each record in the scope; if TRUE, the record is included in the processing.  It provides the same functionality as the FOR clause of record processing commands.
cbWhileBlock
Type: Usual
The condition evaluated for each record from the current record until the condition returns FALSE.  It provides the same functionality as the WHILE clause of record processing commands.
uScope
Type: Usual
The range of records to process, providing the same functionality as the ALL, REST and NEXT clauses of record processing commands. Value Description DBSCOPEALL The scope is all the records in the table.  This is the default, although if a WHILE condition is specified, the scope becomes DBSCOPEREST. DBSCOPEREST The scope is the remaining records in the table from the current position. <nRecords> The scope is the next <nRecords> records.

Return Value

Type: Usual
TRUE if successful; otherwise, FALSE (but note that even in the case of a failure, some records may have been processed).
Remarks
Sends a NotifyIntentToMove message before the operation.  Sends a NotifyFileChange message upon completion, whether successful or not. On successful completion, the current record will be the last file record and DBServer:EOF will be TRUE.
See Also