使用NPOI保存xlsx文件后，当我打开xlsx文件时，它说文件已损坏

Question

xlWorksheet.GetRow(1).GetCell(2).SetCellValue("Hello");
using (FileStream file = new FileStream("Test.xlsx", FileMode.Create, FileAccess.Write))
{
   XLWorkBook.Write(file);
   file.Close();
}

I used this code to write excel file. After writing the excel, when I open excel file manually it is corrupted. I am using NPOI binary 2.1.3.1 Please tell how to avoid excel getting corrupted.

Answer 1

Try adding file.Flush(); before file.Close(); :

xlWorksheet.GetRow(1).GetCell(2).SetCellValue("Hello");
using (FileStream file = new FileStream("Test.xlsx", FileMode.Create, FileAccess.Write))
{
   XLWorkBook.Write(file);
   file.Flush();
   file.Close();
}

Answer 2

I would not recommend using file.Close() in a repeat loop.

Plus, I would recommend opening the file, doing the looping, and then flushing and closing the file.

This method is much better time-wise because repeatedly opening and closing a file consumes a lot of time and requires a trip to the drive every time.