如何在异步过程中从shell中检索完整的结果?

时间:2010-05-20 04:15:53

标签: c# plsql io asynchronous

参考这些帖子:here1here2最后我通过构建异步解决方案来解决我的问题,并且它运行良好!但是我遇到了一个问题,现在我的代码是这样的:

class MyProcessStarter
    {
        private Process process;
        private StreamWriter myStreamWriter;
        private static StringBuilder shellOutput = null;
        public String GetShellOutput { get { return shellOutput.ToString(); }}

        public MyProcessStarter(){
            shellOutput = new StringBuilder("");
            process = new Process();            
            process.StartInfo.FileName = "sqlplus";
            process.StartInfo.UseShellExecute = false;
            process.StartInfo.CreateNoWindow = true;
            process.OutputDataReceived += new DataReceivedEventHandler(ShellOutputHandler);

            process.StartInfo.RedirectStandardInput = true;
            process.StartInfo.RedirectStandardOutput = true;
            //process.StartInfo.RedirectStandardError = true;
            process.Start();
            myStreamWriter = process.StandardInput;
            process.BeginOutputReadLine();
        }

        private static void ShellOutputHandler(object sendingProcess,DataReceivedEventArgs outLine)
        {
            if (!String.IsNullOrEmpty(outLine.Data))
                shellOutput.Append(Environment.NewLine + outLine.Data);
        }

        public void closeConnection()
        {
            myStreamWriter.Close();
            process.WaitForExit();
            process.Close(); 
        }

        public void RunCommand(string arguments)
        {
            myStreamWriter.WriteLine(arguments);
            myStreamWriter.Flush();
            process.WaitForExit(100);
            Console.WriteLine(shellOutput);
            Console.WriteLine("============="+Environment.NewLine);
            process.WaitForExit(2000);
            Console.WriteLine(shellOutput);            
        }
    } 

我的输入是这样的:

 myProcesStarter.RunCommand("myusername/mypassword");
 Console.writeline(myProcesStarter.GetShellOutput);

但看看我的外线:

SQL*Plus: Release 11.1.0.6.0 - Production on Thu May 20 11:57:38 2010
Copyright (c) 1982, 2007, Oracle.  All rights reserved.
=============


SQL*Plus: Release 11.1.0.6.0 - Production on Thu May 20 11:57:38 2010
Copyright (c) 1982, 2007, Oracle.  All rights reserved.
Enter user-name: 
Connected to:
Oracle Database 11g Enterprise Edition Release 11.1.0.6.0 - Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options

因为你看到运行的输出功能在不同的时间是不一样的!所以现在你会给我一个方面,并帮助我,我可以等到所有输出完成其他意味着我如何自定义我的过程到等到输出结束?因为我想写一个sqlcompiler所以我需要shell的确切输出。

请尽快帮助我.thanxxxxxxxxxxxx:X

1 个答案:

答案 0 :(得分:1)

您应该在SQL * Plus上使用-S参数。根据帮助,这个参数

  

设置静音模式,抑制   显示SQL * Plus横幅,   提示,并回显命令。

理想情况下,这会使输出保持一致。