请教c#怎么实现将oracle数据库备份成*dmp类型的文件

请问c#如何实现将oracle数据库备份成*.dmp类型的文件
如题，是用程序实现，谢谢大家

[解决办法]
学习了http://dava.itpub.net/post/2653/279019
[解决办法]

C# code

   /// <summary>        /// MrTom        /// Oracle数据库备份        /// </summary>        private void OracleBackUp()        {            //创建一个进程实例            Process p = new Process();            //生成备份文件的文件名称            string filename = "E:\\DBData" + System.DateTime.Today.ToString("yyyyMMdd") + ".dmp";            //导出程序路径            p.StartInfo.FileName = "D:\\oracle\\product\\10.2.0\\db_1\\BIN\\exp.exe";            //D:\oracle\product\10.2.0\db_1\bin\imp.exe            //启用操作系统外壳程序执行            p.StartInfo.UseShellExecute = true;            //显示dos窗口执行过程            p.StartInfo.CreateNoWindow = false;            //执行参数用户名和密码还有本机配置的Oracle服务名[kdtc/bjdscoal@tns:orcl file=" + filename + ]            string username = txtUsername.Text.Trim();            string pwd = txtPwd.Text.Trim();            string ipAddress = TxtIpAddress.Text.Trim();            p.StartInfo.Arguments = username + "/" + pwd + "@" + ipAddress + "  file=" + filename;
[解决办法]
        /// <summary>
       /// run command ang get the result info
       /// </summary>
       /// <param name="command"></param>
       /// <returns></returns>
       public static string RunCmd(string command)
       {
           Process p = new Process();

           p.StartInfo.FileName = "cmd.exe";           //filename
           p.StartInfo.Arguments = "/c " + command;    //argument
           p.StartInfo.UseShellExecute = false;        //close Shell
           p.StartInfo.RedirectStandardInput = true;   //redirect input
           p.StartInfo.RedirectStandardOutput = true;  //redirect output
           p.StartInfo.RedirectStandardError = true;   //redirect error
           p.StartInfo.CreateNoWindow = true;          //no window

           p.Start();   //start

           //p.StandardInput.WriteLine(command);       //input the command
           //p.StandardInput.WriteLine("exit");        //Exit or will cause collapse

           return p.StandardOutput.ReadToEnd();        //return the result

       }