How to format cells in excel sheet programmatically?

Question

We have an asp.net c# program that reads a sheet from an Excel file and writes it out in a new sheet (also adding one column if data come from a Sql Server table).

I

Answer 1

Just set the appropriate property on your cell (Range) objects.

Set NumberFormat to control the cell number formatting, i.e.:

newSheet.Cells[i, j].NumberFormat = "m/d/yyyy"

Set HorizontalAlignment to control the alignment, i.e.:

newSheet.Cells[i, j].HorizontalAlignment = ExcelAlignment.xlLeft; //or Excel.XlHAlign.xlHAlignLeft