RAD Studio VCL Reference
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TDataSource.Enabled Property

Determines if the data-aware controls associated with the data source component display data.

Pascal
property Enabled: Boolean;
C++
__property Boolean Enabled;

Use Enabled to control whether data-aware controls connected to a data source display data. If Enabled is true (the default), data are displayed. If Enabled is false, all controls associated with the data source are blank.

Note: While an application can set Enabled to false to blank out data-aware controls during processing of multiple records, a better choice is to use the TDataSet EnableControls and DisableControls methods. Using these methods prevents the controls from blanking out during processing.
 

State 

DisableControls 

EnableControls 

Editing Data in a Control 

Enabling and Disabling the Data Source

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