API:Vcl.ValEdit.TValueListStrings.UpdateCount
Delphi
property UpdateCount: Integer read FUpdateCount;
C++
__property UpdateCount;
Properties
| Type | Visibility | Source | Unit | Parent |
|---|---|---|---|---|
| property | protected | Vcl.ValEdit.pas Vcl.ValEdit.hpp |
Vcl.ValEdit | TValueListStrings |
Description
Indicates the number of calls to BeginUpdate that have not been matched by a call to EndUpdate.
Vcl.ValEdit.TValueListStrings.UpdateCount inherits from System.Classes.TStrings.UpdateCount. All content below this line refers to System.Classes.TStrings.UpdateCount.
Indicates the number of calls to BeginUpdate that have not been matched by a call to EndUpdate.
TStrings uses UpdateCount to keep track of calls to the BeginUpdate and EndUpdate methods. Every time a call is made to BeginUpdate, TStrings increments the value of UpdateCount. Every call to EndUpdate causes TStrings to decrement UpdateCount.
When UpdateCount changes from 0 to 1, TStrings calls the SetUpdateState method with a parameter of true. When UpdateCount changes from 1 to 0, TStrings calls the SetUpdateState method with a parameter of false. This allows descendant classes to perform optimizations when handling multiple updates.