Unit 'DB' Package
[Overview][Constants][Types][Classes][Procedures and functions][Variables][Index] [#fcl]

TMasterParamsDataLink

[Properties (by Name)] [Methods (by Name)] [Events (by Name)]

Class to establish a master-detail relationship between dataset, based on parameters.

Declaration

Source position: db.pas line 2104

type TMasterParamsDataLink = class(TMasterDataLink)

public

  constructor Create(); override;

  

Initialize a new TMasterParamsDataLink instance.

  procedure RefreshParamNames; virtual;

  

Refresh the list of parameter names.

  procedure CopyParamsFromMaster(); virtual;

  

Copy parameter values from master dataset.

  property Params: TParams; [rw]

  

Parameters of detail dataset.

end;

Inheritance

TMasterParamsDataLink

  

Class to establish a master-detail relationship between dataset, based on parameters.

|

TMasterDataLink

  

Datalink for Master-Detail relationships between datasets.

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TDetailDataLink

  

Represents the link between a detail data source and a master datasource.

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TDataLink

  

Data event handling agent for controls.

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TPersistent

|

TObject,IFPObserved

Description

TMasterParamsDataLink is a TDataLink descendent that can be used to establish a master-detail relationship between 2 TDataset instances where the detail dataset is parameterized using a TParams instance. It takes care of closing and opening the detail dataset and copying the parameter values from the master dataset whenever the data in the master dataset changes.

See also

TDatalink

  

Data event handling agent for controls.

TDataset

  

Base class for records-based data-access.

TParams

  

A collection of parameter values for SQL-based datasets.

TParam

  

Parameter description class.


Documentation generated on: Oct 27 2024