C#

private Excel.Application app = null;
        private Excel.Workbook workbook = null;
        private Excel.Worksheet worksheet = null;
       // private Excel.Range workSheet_range = null;
        object misValue = System.Reflection.Missing.Value;
         
       

        public void createDoc()
        {
            try
            {
                app = new Excel.Application();
                app.Visible = true;
                workbook = app.Workbooks.Add(1);
                worksheet = (Excel.Worksheet)workbook.Sheets[1];
            }
            catch (Exception e)
            {
                Console.Write("Error");
            }
            finally
            {

            }
        }

        public void addData()
        {
            string s;
            int i = 1;

            foreach (ListViewItem li in listView2.Items)
            {
                s = "A" + i.ToString();
                worksheet.get_Range(s, misValue).Formula = li.Text;
                i++;
            }
        }


        public void addData1()
        {
            string s;
            int i = 1;

            foreach (ListViewItem li in listView1.Items)
            {
                s = "A" + i.ToString();
                worksheet.get_Range(s, misValue).Formula = li.Text;
                i++;
            }

        }

satendrasitu wrote:

app.Visible = true;