Opening a huge .csv file with Excel Interop

Question

I have an application that write huge .csv files about the size ranging from 1 GB to 2 GB.

I need to color code the file and save it as .xlsx.

So I have tried using Excel Interop and it works great for small files, but when I try to open a 1.3 GB .csv file with Excel, I get an Hresult error.

Any ideas as to how I could accomplish this task either with using Excel, or if there is any other way of doing it.

Answer 1

Are you exceeding 1M rows ? Maybe thats the reason for the HRESULT error.

64K rows max before Excel 2007. 1M rows for 2007

Answer 2

There are ways to write and read excel files without using the excel interop. I'm pretty sure I remember microsoft themself have open specifications on the excel fileformat.

Answer 3

感谢您的反馈，在考虑之后，我决定只使用.csv文件。