Excel: can only open file if using absolute path, why?

Question

I have some trouble to understande why I´m getting an exception. I have something like this:

string path = \"file.xls\";
if (File.Exists(path))
{
  Excel.App         


        

Answer 1

I found Matthew Watson's answer very helpful. It's also useful to set a relative path for Workbooks.Add() method. Here is my code for reference:

Excel.Application xlApp = new Excel.Application();

string path = "TestTemplete.xltx";
path = System.IO.Path.GetFullPath(path);
Workbook wb = xlApp.Workbooks.Add(path);