Rowvalidating event c electronic chart updating manual
An event is a message sent by an object to signal the occurrence of an action.
The action can be caused by user interaction, such as a button click, or it can result from some other program logic, such as changing a property’s value. The event sender doesn't know which object or method will receive (handle) the events it raises.
BUTTON1_PUSH: ENTER PRINT (SYSGUI)'TITLE'(100,"Button 1: VAR = " str(VAR)) PRINT (SYSGUI)'TITLE'(103,"") EXIT REM This Callback is registered using Subroutine Name REM and therfore does a RETURN BUTTON2_PUSH: PRINT (SYSGUI)'TITLE'(100,"") PRINT (SYSGUI)'TITLE'(103,"You Pressed Button 2!
Meanwhile, we can use the Validate Row event in the same way to prevent the user from exiting the current row.The Kettic Data Grid View allows users of the control easily validate data grid cells when data is committed to the data source.To validate data to grid cells and rows, we need to use the Validate Cell event, which will be raised by the Kettic Data Grid View when there are any changes to the current cell or when the grid cell loses input focus like.This article describes the major components of the delegate model, how to consume events in applications, and how to implement events in your code.For information about handling events in Windows 8.x Store apps, see Events and routed events overview.
A delegate is thus equivalent to a type-safe function pointer or a callback. In the context of events, a delegate is an intermediary (or pointer-like mechanism) between the event source and the code that handles the event.