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       
(Showing Draft Content)

合并追加工作表

合并追加工作表常见问题


背景:

在填报、报表场景中,客户需要将多个工作簿的个别工作表添加到别的工作簿当中,实现合并部分工作表到其它工作簿的需求。

解决方案:

正常来说,只需要简单的工作表级别的toJSON()和fromJSON()即可。但是Excel文件比较特殊,会包含公式、样式、图表、图形透视表等多种元素,且元素中的命名也有一定要求。主要包含以下几点:

(1)同一个工作簿中,工作表名称、图表、表格名称不允许重复。

(2)工作表中的公式单元格可能会依赖其它工作表,该依赖工作表不一定会存在于目标合并文件中。

(3)Excel中包含命名样式,如果被合并的工作表中用到之前工作簿上的命名样式,而目标合并文件上并不存在这一命名样式,会导致样式无法正常显示。


接下来,针对上述集中情况,给出具体的解决方法。

(1)同一个工作簿中,工作表名称、图表、表格名称不允许重复。

这个解决方法比较简单,只需要依次遍历需要合并的工作表中的相关元素,重命名加上一个独一无二的标志即可。当然,这一点还是需要研发和业务精心设计,去确定一个独一无二的标志。

(2)工作表中的公式单元格可能会依赖其它工作表,该依赖工作表不一定会存在于目标合并文件中。

SpreadJS提供获取单元格公式的相关API,需要去判断公式中是否有别的工作表引用,如果有的话,在合并时,需要根据业务需求,去决定删除公式还是同时合并公式依赖的工作表。注意,被依赖的工作表有可能也存在其它表依赖,这块需要递归查找。

(3)Excel中包含命名样式,如果被合并的工作表中用到之前工作簿上的命名样式,而目标合并文件上并不存在这一命名样式,会导致样式无法正常显示。

Excel中的命名样式,分为文件级别和工作表级别。如果是工作表级别,其实不需要太多额外处理,直接toJSON即可。但如果是文件级别的命名样式,这时就需要额外处理了。我们可以将要合并的工作表所在的工作簿上的命名样式,全部再添加到工作表级别。具体代码实现看这里

JSCodeMine Sample:gFQcxf2CE0i9U-PNKNGyHQ
Edit Codemine Block
Edit in JS CodeMine
codemineBlock

但是它的弊端其实也比较明显,大部分客户的文件,可能都是一些在excel中制作的历史文件,有的可能被多个人修改,里边存在的命名样式达到几百个,但是并不是每一个命名样式当前工作表会用到,这导致会有一定的数据冗余,甚至会造成一些性能问题。

总结:以上是SpreadJS上合并追加sheet的实现细节,需要注意的是,目前SpreadJS官方并没有直接支持外部sheet的追加合并,因此所有的方案,都会有一些未知的风险。

作者: Grapecity.China | 审核:Ellia.Duan | 更新时间:2023.12.28