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[Properties (by Name)] [Methods (by Name)] [Events (by Name)]
Datalink for Master-Detail relationships between datasets.
Source position: db.pas line 1455
type TMasterDataLink = class(TDetailDataLink) |
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protected |
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procedure ActiveChanged; override; |
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procedure CheckBrowseMode; override; |
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function GetDetailDataSet; override; |
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procedure LayoutChanged; override; |
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procedure RecordChanged(); override; |
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procedure DoMasterDisable; virtual; |
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procedure DoMasterChange; virtual; |
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public |
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constructor Create(); virtual; |
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Create a new instance of TMasterDataLink |
destructor Destroy; override; |
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Free the datalink instance from memory |
property FieldNames: String; [rw] |
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List of fieldnames that make up the master-detail relationship |
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List of fields as specified in FieldNames |
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property OnMasterChange: TNotifyEvent; [rw] |
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Called whenever the master dataset data changes |
property OnMasterDisable: TNotifyEvent; [rw] |
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Called whenever the master dataset is disabled |
end; |
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Datalink for Master-Detail relationships between datasets. |
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Represents the link between a detail data source and a master datasource. |
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Data event handling agent for controls |
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TMasterDataLink is a TDatalink descendent which handles master-detail relations. It can be used in TDataset descendents that must have master-detail functionality: the detail dataset creates an instance of TMasterDataLink to point to the master dataset, which is subsequently available through the TDataLink.Dataset property.
The class also provides functionailty for keeping a list of fields that make up the master-detail functionality, in the TMasterDatalink.FieldNames and TMasterDataLink.Fields properties.
This class should never be used in application code.
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Base class for records-based data-access |
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Datasource this datalink is connected to |
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Dataset this datalink is connected to |
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List of fieldnames that make up the master-detail relationship |
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List of fields as specified in FieldNames |
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