TMasterParamsDataLink¶

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

Declaration¶

Source position: db.pas line 2108

type

  TMasterParamsDataLink = class(TMasterDataLink)
  public
    constructor Create;
    procedure RefreshParamNames;
    procedure CopyParamsFromMaster;
    property Params: TParams; {rw}
  end;

Inheritance¶

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.

Properties¶

Member	Visibility	Description
Params	public	Parameters of detail dataset.

See all Properties

Methods¶

Member	Visibility	Description
CopyParamsFromMaster	public	Copy parameter values from master dataset.
Create	public	Initialize a new TMasterParamsDataLink instance.
RefreshParamNames	public	Refresh the list of parameter names.

See all Methods

Name	Description
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.