使用 c# 中的 Excel 互操作从多个.xlsx 文件中提取数据的最有效方法？

Question

I have just started getting into Excel Interop and was wondering how I could improve the performance of my application by implementing either multithreading or multitasking.

My code looks something like this atm:

foreach(var path in arrayOfExcelFilePaths){
    excelApp.Workbooks.Open(path);
}
foreach(var wb in excelApp.Workbooks){
    //Read stuff and maybe write stuff
}

Thanks in advance for anybody looking into this.

Answer 1

Using Interop is a bad idea in general. The execution of your code won't differ much from its equivalent written in a VBA macro, because Interop simply runs the Excel process in the background and replicates its functionality 1-to-1.

Try OfficeOpenXML or any other library that allows you manipulate the content of excel sheets without running MS Excel as Interop does.

Answer 2

I highly recommend you use the EPPlus 5 library, which is a newer version of the EPPlus library. Its fast and reliable, I've been using it for years without any issues.