C# .NET - datas export to excel from datagridview

 hi, i am working now windows application , i need to datagridview datas export to excel but i am set checkbox in the datagridview . that checkbox rows to checked is true that rows only export to excel. i am use below code headertext is not export how to use please help me very urgent...

 Microsoft.Office.Interop.Excel.ApplicationClass excel = new Microsoft.Office.Interop.Excel.ApplicationClass();
            excel.Application.Workbooks.Add(Type.Missing);
            excel.Columns.ColumnWidth = 20;

            string billno = "";                          
            int i = 0;
            int j = 0;
            int s = 0;
           
            for (i = 0; i <= dataGridView1.RowCount - 1; i++)
            {
              if (Convert.ToBoolean(dataGridView1.Rows[i].Cells[0].Value) == true)
              {   
                for (j = 0; j <= dataGridView1.ColumnCount - 1; j++)
                {                  
                  DataGridViewCell cell = dataGridView1[j, i];                  
                  excel.Cells[i + 1, j + 1] = cell.Value;
                }   
              }
            }
            
            // excel.Visible = true;
            Worksheet worksheet = (Worksheet)excel.ActiveSheet;
            worksheet.Activate();

            string ss = System.DateTime.Now.ToString("dd MM yyyy-hh mm");
            string fileName = selectPath + String.Format("\\Excel-{0}.xls", ss);
            excel.ActiveWorkbook.SaveCopyAs(fileName);
            excel.ActiveWorkbook.Saved = true;
            excel.Quit();

Instead going for Excel Automation, go for the OLEDB.net. The Excel Automation requires excel to be installed on the client computer where OLEDB.net requires only drivers.

Here are few examples

http://blueraiden.exofire.net/blog/import-excel-spreadsheet-data-to-datagridview-using-vb-net

http://csharp.net-informations.com/datagridview/csharp-datagridview-load-excel.htm

Go for the First One

You can see this article, it uses a dataexport component and use 9 solutions to export data to excel with C#, including datagridview, please chack, this article will helpful to you:
http://www.codeproject.com/Articles/164582/8-Solutions-to-Export-Data-to-Excel-for-ASP-NET