.net程序里实现远程备份还原ORACLE数据库

string ls_dmp = "DATEBASE.dmp";
            string ls_log =  "DATABASE.log";
            string ls_name = "USRID"
            string ls_pwd = "USRPWD"
            string ls_tns = "TNS";
            string ls_cmd = "exp "+ls_name+"/"+ls_pwd+ls_tns+" file="+ls_dmp+" log="+ls_log;
    
            //开始创建文件 
            Process p = new Process(); 
            p.StartInfo.FileName = "cmd.exe"; 
            p.StartInfo.UseShellExecute = false; 
            p.StartInfo.RedirectStandardInput = true; 
            p.StartInfo.RedirectStandardOutput = true; 
            p.StartInfo.RedirectStandardError = true; 
            p.StartInfo.CreateNoWindow = true;            
            try 
            ...{ 
                p.Start(); 
                p.StandardInput.WriteLine(ls_cmd); 
                p.StandardInput.WriteLine("exit"); 
                //string ls_ret = p.StandardOutput.ReadToEnd();

                lab_ts.Text = "提示：数据库备份成功！";
                Response.Write("<script>alert('"+lab_ts.Text+"');</script>");
                p.Close();
            } 
            catch(Exception err)
            ...{ 
                lab_ts.Text = "提示：数据库备份失败！"+err.Message;
                Response.Write("<script>alert('"+lab_ts.Text+"');</script>");
            }