DbServer.Eval Method

 VIRTUAL METHOD Eval(
	cbBlock,
	cbForBlock,
	cbWhileBlock,
	uScope
) AS USUAL CLIPPER

[ClipperCallingConventionAttribute(new string[] { ... })]
public virtual Usual Eval(
	Usual cbBlock = default,
	Usual cbForBlock = default,
	Usual cbWhileBlock = default,
	Usual uScope = default
)

Parameters

cbBlock (Optional)

Type: Usual
The code block to execute for each record processed.

cbForBlock (Optional)

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 (Optional)

Type: Usual
The condition evaluated for each record from the first record until the condition returns FALSE. It provides the same functionality as the WHILE clause of record processing commands.

uScope (Optional)

Type: Usual
The range of records to process, providing the same functionality as the ALL, REST and NEXT clauses of record processing commands.

Constant	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.

Return Value

Reference