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单元格相关事件常见问题

问题1：在CellChanged事件中，为什么修改单元格会触发两次该事件

答：CellChanged 的info信息中有个property 信息，一次修改会触发两次，一次是value变化，一次是style变化。

问题2：公式单元格值改变为什么不会触发ValueChanged事件

答：如果是公式本身的单元格发生改变会触发valueChanged事件，如果是引用的单元格发生改变也会触发valueChanged，但是是因为引用的单元格发生改变而被触发，公式本身的单元格因为引用单元格值改变而改变公式计算结果是不会触发valueChanged事件。因为如果公式所有的引用都会触发相应事件，那么这个就会触发特别多次，公式之间还有可能循环引用，这样监听的话性能太差。如果非常希望能够监听公式计算完后能够触发的事件，可以尝试监听RangeChanged事件：

sheet.bind(GC.Spread.Sheets.Events.RangeChanged, function (data, args) {
  var cells = args.changedCells;
});

问题3：单元格值被删除为什么不会触发ValueChanged事件

答：该问题与问题2一样，如果是通过Delete和右键清除按钮对单元格值进行清除是不会触发valuechanged事件的，想要监听删除操作，可以通过RangeChanged事件的监听来实现

sheet.bind(GC.Spread.Sheets.Events.RangeChanged, function (event, info) {
    if (info.action === Gc.Spread.Sheets.RangeChangedAction.Clear) {
        alert('您清除了内容')
    }
});

作者: Grapecity.China | 审核：Lynn.Dou | 更新时间：2023.12.12