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       
(Showing Draft Content)

文件格式错误问题

type=warning

注意:在 v16.0 后续版本中,SpreadJS 已经使用 sheet.io 替换了原先的 ExcelIO,同时发布了性能更高、文件更小的 SJS 格式

后续 ExcelIO 将逐步被废弃

问题:在使用 excelIo.save() 函数进行文件保存时,控制台报错: errorMessage'文件格式错误'


解决方案:

SpreadJS支持导入导出xlsx版本的Excel文件,通过使用ExcelIO组件可将Excel文件转换成SpreadJS的ssjson。

具体可参考:链接

image

Excel的opensave方法都包含四个参数,‘文件格式错误’的错误信息就是从第三个参数的错误回调中获取到的。

image

image

当出现了’文件格式错误‘,我们按照如下步骤排查问题

1. 导入Excel时,确定Excel格式

SpreadJS支持xlsx格式的Excel文件,老版本的xls是不支持的,通过改文件后缀的方式并不能改变文件的存储格式,如果是xls的文件,需要使用Excel应用另存为xlsx的文件再导入

2. 导出Excel时,确定是否引用了FileSaver.js第三方资源包

导出的成功回调中的saveAs方法就是这个包的方法,如果有用框架,需要通过import的方式引入

3. 判断成功回调中是否有代码异常

由于JavaScript是单线程,成功回调中执行的代码也是excelIO逻辑的一部分,如果这里的代码出了一场,也会被excelIO内部catch,然后通过失败回调提示。由于被catch这里的异常经常被忽视。

调试方法有两种:

a. 成功回调中打断点,如果进入断点则说明,Excel IO的open和save逻辑已经完成,异常肯定在后面,继续调试即可。

如下图中,成功进入成功回调,并且Excel文件的blob已经生成,但是由于s.s不存在,单步执行时直接进入失败回调。

image

b. 开启浏览器异常暂停功能

开启后,try 中的异常也会被捕获到直接抛出,这样就知道是哪里的问题了。

image


如果以上三种都不是,那就说明的确是文件的问题了,将发生异常的文件提交到技术论坛,我们技术顾问会来协助你。

作者: Grapecity.China | 审核:Clark.Pan | 更新时间:2023.09.27