GetPrevious Method (currentId, foundCurrent, atStart)

BizBlox

Find the Item in the DOCollection that precedes the Item with the specified UID.

Declaration Syntax

Visual Basic

Visual C++

public DataObject GetPrevious(
	Guid currentId,
	ref bool foundCurrent,
	ref bool atStart
)

Public Function GetPrevious ( _
	currentId As Guid, _
	ByRef foundCurrent As Boolean, _
	ByRef atStart As Boolean _
) As DataObject

public:
DataObject^ GetPrevious(
	Guid currentId, 
	bool% foundCurrent, 
	bool% atStart
)

Parameters

currentId (Guid): The UID of the current Item

foundCurrent ( Boolean %): Returns true if the current Item has been found in the Collection. This is designed for dynamic collections, where Items may be removed.

atStart ( Boolean %): Returns true if the current Item is the first Item in the Collection.

Return Value

If the Item with UID currentId is not found in the DOCollection, or if it is the first Object in the DOCollection, the method returns a null value. Otherwise, it returns the previous DataObject in the Collection.

Remarks

This method is used in conjunction with GetNext for navigating DOCollections.

Examples

Dim sColl as New StudentCollection sColl.FindAll() If sColl.Count > 0 Then Dim currentStudent As Student = sColl(SColl.Count() - 1) Dim foundCurrent As Boolean = False Dim atStart As Boolean = False Dim previousStudent As Student = sColl.GetPrevious(currentStudent, foundCurrent, atStart) End If

Assembly: pixolut.BizBlox (Module: pixolut.BizBlox) Version: 1.8.5.0