Creating an Excel Spreadsheet and Adding Data to It Programmatically

This is the sample code to create an Excel Spreadsheet and Adding Data to It Programmatically.

using System;
using System.Reflection;
using System.Runtime.InteropServices;
using Excel;

class Excel {
public static int Main() {
Application exc = new Application();
if (exc == null) {
Console.WriteLine("ERROR: EXCEL couldn't be started!");
return 0;

exc.set_Visible(0, true);
Workbooks workbooks = exc.Workbooks;
_Workbook workbook = workbooks.Add(XlWBATemplate.xlWBATWorksheet, 0);
Sheets sheets = workbook.Worksheets;

_Worksheet worksheet = (_Worksheet) sheets.get_Item(1);
if (worksheet == null) {
Console.WriteLine ("ERROR: worksheet == null");

Range range1 = worksheet.get_Range("C1", Missing.Value);
if (range1 == null) {
Console.WriteLine ("ERROR: range == null");
const int nCells = 1;
Object[] args1 = new Object[1];
args1[0] = nCells;
range1.GetType().InvokeMember("Value", BindingFlags.SetProperty, null,range1, args1);
return 100;

Now let us observe how to send a single dimension array to Excel:
It is similar to set the value for the cell. Only change is we use array as args2[0] = array2.

const int nCell = 5;
Range range2 = worksheet.get_Range("A1", "E1");
int[] array2 = new int [nCell];
for (int i=0; i < array2.GetLength(0); i++) {
array2[i] = i+1;
Object[] args2 = new Object[1];
args2[0] = array2;
range2.GetType().InvokeMember("Value", BindingFlags.SetProperty, null, range2, args2);


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