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TDataSet.SparseArrays
TDataSet
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Determines whether an unique TField object is created for each element of an array field.

property SparseArrays: Boolean;

Description
When opening a table or client data set with an array field, SparseArrays determines whether a unique field component is created for each element of the array field. The default is False, where a TField descendant is created for each element of the array field. If you plan to bind data-aware controls to elements of the array field, SparseArrays must be set to False. Setting SparseArrays to True conserves memory, but does not allow applications to gain a reference to an element of the array field.


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