private void OpenExcel(string strFileName)        {            object missing = System.Reflection.Missing.Value;            Microsoft.Office.Interop.Excel.Application excel = new Microsoft.Office.Interop.Excel.Application();//启动Excel应用程序            if (excel == null)            {                MessageBox.Show("Can't access excel");            }            else            {                excel.Visible = false;//对象是否可见                excel.UserControl = true;//如果应用程序可见或者由用户创建或启动，则为true。 如果您使用CreateObject或GetObject函数以编程方式创建或启动应用程序，并且隐藏应用程序，则为False。                //只读方式打开EXCEL文件                Workbook wb = excel.Application.Workbooks.Open(strFileName, missing, true, missing, missing, missing, missing, missing,                                                                 missing, true, missing, missing, missing, missing, missing);                             //取得第1个工作薄                Worksheet ws = (Worksheet)wb.Worksheets.get_Item(1);               Range value1 = ws.Cells[2][5];//单元格:B-5               Range value2 = ws.Cells[1][2];//单元格:A-2                             this.textBox1.Text =value2.Text;            }            excel.Quit(); excel = null;//退出Microsoft Excel            System.Diagnostics.Process[] procs = System.Diagnostics.Process.GetProcessesByName("excel");            foreach (Process pro in procs)            {                pro.Kill();//没有更好的方法,只有杀掉进程            }            GC.Collect();        }