SMART datagrid v.1 > Classes > GridBase
It will be fired just before the user types Insert key in the existing row location or down key in the last row to start grid row appending.
It is the same when you call GridBase.insert. If explicitly call false within this event handler, you will not be able to do row appending. Just after starting appending, onInsertStarted will be fired.
grdMain.onInserting = function (grid, rowIndex) {
if ($('#chkInsert').is(':checked')) {
return false;
}
};