IDADelta

From RemObjects Software

This is a Data Abstract Architecture entry
Feel free to add your notes to this topic below.

Overview

The IDADelta interface represents a set of changes to be transmitted between client and server. These can be client-side changes that are pending to be applied to the server database, or server-side changes that are being propagated back to the client. This interface is implemented by the TDADelta class.

File

• uDADelta

Hierarchy

• IDADelta

Properties

Property	Type	Description
Changes	TDADeltaChange	Provides access to all the individual changes contained in the delta. The indexer is zero-based and the number of elements is indicated by the Count property.
Count	Integer	Returns the number of Changes contained within the delta.
KeyFieldCount	Integer	Indicates the number of fields that comprise the key for this delta.
KeyFieldNames	String	Lists the names of the fields that comprise the key for this delta. The indexer is zero-based and the number of elements is indicated by the KeyFieldCount property.
LoggedFieldCount	Integer	Shows the number of fields that comprise the data for this delta.
LoggedFieldNames	String	Holds the names of the fields that comprise the data for this delta. The indexer is zero-based and the number of elements is indicated by the LoggedFieldCount property.
LoggedFieldTypes	TDADataType	Lists the data types of the fields that comprise the data for this delta. The indexer is zero-based and the number of elements is indicated by the LoggedFieldCount property.
LogicalName	String	Definrs the name of the logical entity that this delta pertains to. Usually, this will be the name of the data table that changes should be applied to.

Methods

Method	Description
Add	Adds a new delta change to to the list of changes maintained within the delta.
Clear	Clears the delta and discards all the individual changes that it contains.
IsNewRecord	Indicates whether the record in question represents a newly inserted record that doesn't exist on the server yet (true) or a changed record that already exists on the server (false). If called without parameter (or with -1), the result value will indicate the status of the current record in the data table associated with the delta (client-side only). If called with a non-negative record id, it will indicate the status of that record.
RemoveChange	Removes a delta change to the list of changes maintained within the delta.

See Also

• TDADelta
• Lists
  • Namespaces
  • Classes: .NET — Delphi
  • Interfaces: .NET — Delphi
  • Enums: .NET — Delphi
  • Types: Data — File

Product: RemObjects Data Abstract
Current version: Data Abstract 'Vinci' (5.0)

Lists — Glossary — Features — How To — Drivers — Components — Tools — Samples — Articles — Architecture — Issues