Read an excel file example about npoi

[yang-xiaodong]

https://gist.github.com/yuleyule66/1e2c9bba2dba00337535a282f1a0c1eb

[CharlesOkwuagwu]

@yuleyule66 Please can you guide me in this scenario:

I have an existing excel file template.xlsx. I make a copy of this file, and I want to write to the copy with new data retaining the formatting of the template.xlsx file.

My attempt

https://gist.github.com/CharlesOkwuagwu/a9a34647070b87a86a170875a8468ced

The problem is that the code runs through successfully, but the new file never gets updated.

Thanks.

[sherpya]

@CharlesOkwuagwu try this way:

XSSFWorkbook wb;

using (var fs = File.OpenRead(template))
{
    wb = new XSSFWorkbook(fs);
}

using (var fs = new FileStream(dest, FileMode.Create, FileAccess.Write))
{
    var ws = wb.GetSheetAt(0);
    ...
    ...
    wb.Write(fs);
}