string fileName = Path.Combine(Application.StartupPath, "kfwh_yhxf.xls");Microsoft.Office.Interop.Excel.Application app = new Microsoft.Office.Interop.Excel.Application(); if (app == null){    MessageBox.Show("对不起，您的电脑没有安装Excel，下发失败！");    return;}app.Visible = false;app.UserControl = true;app.DisplayAlerts = false;app.AlertBeforeOverwriting = false;            Microsoft.Office.Interop.Excel.Workbooks workbooks = app.Workbooks;Microsoft.Office.Interop.Excel._Workbook workbook = workbooks.Add(fileName); //加载模板Microsoft.Office.Interop.Excel.Sheets sheets = workbook.Sheets;Microsoft.Office.Interop.Excel._Worksheet worksheet = (Microsoft.Office.Interop.Excel._Worksheet)sheets.get_Item(1); //第一个工作薄。if (worksheet == null){    return;  //工作薄中没有工作表.}try{    worksheet.Cells[11, 1] = "1";               worksheet.Cells[11, 2] = "123";             worksheet.Cells[11, 3] = "123";             worksheet.Cells[11, 4] = "123";             worksheet.Cells[11, 5] = "备注";            worksheet.Cells[11, 6] = "";                app.SaveWorkspace(Type.Missing);}catch (Exception exp){    // MessageBox.Show(exp.Message);}finally{    app.Quit();    app = null;}