How to make a website that is able to export an excel file?

[Ivan Stefanov]

Hello, I have the following problem:
I created a website project and I want in that website to be make a button, which will export some data in an excel file. This is the code that I have:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using Excel = Microsoft.Office.Interop.Excel;

namespace TU_Sofia_PublicationSystem
{
    public partial class Default : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {

        }

        protected void ExportToExcel(object sender, EventArgs e)
        {
            Excel.Application excelApp = new Excel.Application();
            excelApp.Workbooks.Add();
            Excel._Worksheet workSheet = excelApp.ActiveSheet;
            workSheet.Cells[1, "A"] = "Make";
            workSheet.Cells[1, "B"] = "Colorqqqqqqqqq";
            workSheet.Cells[1, "C"] = "Pet Namesdvbpofsdajnvbdajbi";
            workSheet.SaveAs(@"C:\Inventory.xlsx", Excel.XlFileFormat.xlWorkbookDefault, Excel.XlSaveAsAccessMode.xlNoChange);
            excelApp.Workbooks.Close();
            excelApp.Quit();
            excelApp = null;
        }
    }

Now this will work only if in the SaveAs method I change "C:\Inventory.x lsx" with "Inventory.xlsx " and the file will be saved in My Documents. If I try to specify a path the following error is shown:

Microsoft Excel cannot access the file 'C:\094B4000'. There are several possible reasons:
• The file name or path does not exist.
• The file is being used by another program.
• The workbook you are trying to save has the same name as a currently open workbook.

I suppose that this is tottaly not the way that I have to do it; however I was unable to find some valuable information using Google and a lots of books that I have(from Apress).

Any help like code, or like in which book can I find information is highly appreciated.