How to read an Excel spreadsheet in c# quickly

Question

I am using Microsoft.Office.Interop.Excel to read a spreadsheet that is open in memory.

gXlWs = (Microsoft.Office.Interop.Excel.Worksheet)gXlApp.ActiveWorkbo         


        

Answer 1

I guess it's not the Convert the source of "slowing"...

Actually, retrieving cell values is very slow.

I think this conversion is not necessary:

(Microsoft.Office.Interop.Excel.Range)gXlWs

It should work without that.

And you can ask directly:

gXlWs.Cells[NumRow, 1].Value != null

Try to move the entire range or, at least, the entire row to an object Matrix and work with it instead of the range itself.