How to create a password protected Excel file?

Question

I have a list type of object and i need to create a excel file which should required password to open that excel file in ASP.NET C#.

I have tried ClosedXML package but that is not working well. And also I have tried much more example but I didn't found any good example.

Please, If any one have done these type of example then please let me know.

Much Appreciation !

Answer 1

If you want an Excel password all you need is something like this:

using Microsoft.Office.Interop.Excel

//create your spreadsheet here...

WorkbookObject.Password = password;
WorkbookObject.SaveAs("spreadsheet.xls")

This requires Excel to be installed.