Delphi Database, Delphi Components from ComponentAce
Products Download Order Contact us
TDataSet.DisableControls
TDataSet
Top 


Disables data display in data-aware controls associated with the dataset.

procedure DisableControls;

Description
Call DisableControls prior to iterating through a large number of records in the dataset to prevent data-aware controls from updating every time the active record changes. Disabling controls prevents flicker and speeds performance because data does not need to be written to the display.

If controls are not already disabled, DisableControls records the current state of the dataset, broadcasts the state change to all associated data-aware controls and detail datasets, and increments the dataset's disabled count variable. Otherwise, DisableControls just increments the disabled count variable.

The disabled count is used internally by other methods and objects to determine whether to display data in data-aware controls. When the disable count variable is greater than zero, data is not displayed.

If the dataset is the master of a master/detail relationship, calling DisableControls also disables the master/detail relationship. Setting BlockReadSize instead of calling DisableControls updates the detail datasets as you scroll through the dataset, but does not update data-aware controls.

Note:
DisableControls can safely be called when controls are already disabled. In complex applications there may be separate operations that are sometimes nested, both of which need to disable controls.
        © 2003 - 2017 ComponentAce  | .net zip component | barcode for .net | delphi zip component | delphi database Dec 15, 2017