1 增加应用      Microsoft.Office.Interop.Excel2 引用命名空间  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){//createobject 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";//headlineworksheet.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){//openobject 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 countint 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 appapp.Quit();}