C# Excel 생성 및 쓰기

        1        Microsoft.Office.Interop.Excel

        2    using Excel = Microsoft.Office.Interop.Excel;

        /// <summary>

        /// If the supplied excel File does not exist then Create it

        /// </summary>

        /// <param name="FileName"></param>

        private void CreateExcelFile(string FileName)

        {

            //create

            object Nothing = System.Reflection.Missing.Value;

            var app = new Excel.Application();

            app.Visible = false;

            Excel.Workbook workBook = app.Workbooks.Add(Nothing);

            Excel.Worksheet worksheet = (Excel.Worksheet)workBook.Sheets[1];

            worksheet.Name = "Work";

            //headline

            worksheet.Cells[1, 1] = "FileName";

            worksheet.Cells[1, 2] = "FindString";

            worksheet.Cells[1, 3] = "ReplaceString";



            worksheet.SaveAs(FileName, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Excel.XlSaveAsAccessMode.xlNoChange, Type.Missing, Type.Missing, Type.Missing);

            workBook.Close(false, Type.Missing, Type.Missing);

            app.Quit();

        }



        /// <summary>

        /// open an excel file,then write the content to file

        /// </summary>

        /// <param name="FileName">file name</param>

        /// <param name="findString">first cloumn</param>

        /// <param name="replaceString">second cloumn</param>

        private void WriteToExcel(string excelName,string filename,string findString,string replaceString)

        {

            //open

            object Nothing = System.Reflection.Missing.Value;

            var app = new Excel.Application();

            app.Visible = false;

            Excel.Workbook mybook = app.Workbooks.Open(excelName, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing);

            Excel.Worksheet mysheet = (Excel.Worksheet)mybook.Worksheets[1];

            mysheet.Activate();     

            //get activate sheet max row count

            int maxrow = mysheet.UsedRange.Rows.Count + 1;

            mysheet.Cells[maxrow, 1] = filename;

            mysheet.Cells[maxrow, 2] = findString;

            mysheet.Cells[maxrow, 3] = replaceString;

            mybook.Save();

            mybook.Close(false, Type.Missing, Type.Missing);

            mybook = null;

            //quit excel app

            app.Quit();

        }