I have the following code which exports to a new Excel but I want to export to an existing one:
 //      Microsoft.Office.Interop.Excel.Application xla = new Microsoft.Office.Interop.Excel.Application();
    //        Workbook thodoris = xla.Workbooks.Add(XlSheetType.xlWorksheet);
    //        Worksheet mike = (Worksheet)xla.ActiveSheet;
    //        xla.Visible = true;
    //     for (int i=1;i<dataGridView1.ColumnCount+1;i++)
    //    {
    //        xla.Cells[1, i] = dataGridView1.Columns[i - 1].HeaderText;
    //    }
    //     for (int i = 0; i < dataGridView1.RowCount; i++)
    //         {
    //             for (int j = 0; j < dataGridView1.ColumnCount; j++)
    //             {
    //                     xla.Cells[i + 2, j + 1] = dataGridView1.Rows[i].Cells[j].Value.ToString();
    //         }
    //       }
How can I do that?
 
    