Table of Contents
- Getting Started
- EO.Pdf
- EO.Web
- EO.WebBrowser
- EO.Wpf
- Common Topics
- Reference
- .NET API Reference
- JavaScript API Reference
- EO.Web
- EO.Web
- Objects
- Global Functions
- Event Handlers
- Event Handlers
- calendar_event_handler
- callback_after_execute_handler
- callback_after_update_handler
- callback_before_execute_handler
- clientside_error_handler
- clientside_evalvar
- clientside_generic_handler
- clientside_message_handler
- contextmenu_handler
- dialog_event_handler
- editablelabel_change_handler
- editor_contextmenu
- editor_paste_handler
- grid_column_beginedit
- grid_column_endedit
- grid_customcolumn_gettext
- grid_itemcommand_handler
- grid_itemevent_handler
- navigator_event_handler
- spellchecker_correct_error_handler
- toolbar_event_handler
- treeview_afterpopulate_handler
- treeview_checkstatechanging_handler
- treeview_dragdrop_handler
- treeview_rename_handler
- uploader_fileselected_handler
- uploader_progress_handler
- EO.WebEngine
- EO.Web
| callback_before_execute_handler |
Client side event handler for Callback.ClientSideBeforeExecute and CallbackPanel.ClientSideBeforeExecute.
Note: This is a prototype, not a function. You should provide a function that matches this prototype if you wish to handle the corresponding event on the client side. The prototype provides information about the arguments and return value of the function you provide.
Syntax
Parameters
- callback
- The Callback object that triggered the callback.
Return Value
-
Returns false to cancel the callback.
Remarks
You should provide this function if you want to use client side event handling. This function gives you an opportunity to examine the parameter or perform any other action before a callback is started. You can also optionally cancel the callback by returning false from this function.
You can use getTriggerId and getParam to get more information about the current callback.
See Also
