RAD Studio VCL Reference
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TField.LookupList Property
TField Class | TField Members | DB Namespace | Description | See Also
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Indicates a cache of values from the LookupDataSet indexed by a set of values from the KeyFields property.

Pascal
property LookupList: TLookupList;
C++
__property TLookupList LookupList;
Description

Inspect LookupList to find the cached value assigned to the field for a given set of values on the fields specified by KeyFields. The value of LookupList is set when the dataset is open or the RefreshLookupList method is called.

Tip: Applications can also fill LookupList programmatically to provide lookup values as long as the LookupDataSet property is not set.
The ValueOfKey method of the LookupList returns the value of the LookupResultField for a set of values on the LookupKeyFields. This allows the value of the lookup field object to be computed as follows:

Copy Code
Value := LookupList.ValueOfKey(DataSet.FieldValues[KeyFields]);

 

Copy Code
Value = LookupList->ValueOfKey(DataSet->FieldValues[KeyFields]);

Note: LookupList is only meaningful when the value of FieldKind is fklookup and the LookupCache property is true.
 

See Also
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