// Define the namespaces used by this sample.
using System;
using System.Text;
using System.IO;
using System.Diagnostics;
using System.Threading;
using System.ComponentModel;namespace ProcessAsyncStreamSamples
{class SortOutputRedirection{// Define static variables shared by class methods.private static StringBuilder sortOutput = null;private static int numOutputLines = 0;public static void SortInputListText(){// Initialize the process and its StartInfo properties.// The sort command is a console application that// reads and sorts text input.Process sortProcess;sortProcess = new Process();sortProcess.StartInfo.FileName = "Sort.exe";//捕獲Sort.exe的cout輸出// Set UseShellExecute to false for redirection.sortProcess.StartInfo.UseShellExecute = false;// Redirect the standard output of the sort command.  // This stream is read asynchronously using an event handler.sortProcess.StartInfo.RedirectStandardOutput = true;sortOutput = new StringBuilder("");// Set our event handler to asynchronously read the sort output.sortProcess.OutputDataReceived += new DataReceivedEventHandler(SortOutputHandler);// Redirect standard input as well.  This stream// is used synchronously.sortProcess.StartInfo.RedirectStandardInput = true;// Start the process.sortProcess.Start();// Use a stream writer to synchronously write the sort input.StreamWriter sortStreamWriter = sortProcess.StandardInput;// Start the asynchronous read of the sort output stream.sortProcess.BeginOutputReadLine();// Prompt the user for input text lines.  Write each // line to the redirected input stream of the sort command.Console.WriteLine("Ready to sort up to 50 lines of text");String inputText;int numInputLines = 0;do {Console.WriteLine("Enter a text line (or press the Enter key to stop):");inputText = Console.ReadLine();if (!String.IsNullOrEmpty(inputText)){numInputLines ++;sortStreamWriter.WriteLine(inputText);}}while (!String.IsNullOrEmpty(inputText) && (numInputLines < 50));Console.WriteLine("<end of input stream>");Console.WriteLine();// End the input stream to the sort command.sortStreamWriter.Close();// Wait for the sort process to write the sorted text lines.sortProcess.WaitForExit();if (numOutputLines > 0){// Write the formatted and sorted output to the console.Console.WriteLine(" Sort results = {0} sorted text line(s) ", numOutputLines);Console.WriteLine("----------");Console.WriteLine(sortOutput);}else {Console.WriteLine(" No input lines were sorted.");}sortProcess.Close();}private static void SortOutputHandler(object sendingProcess, DataReceivedEventArgs outLine){// Collect the sort command output.if (!String.IsNullOrEmpty(outLine.Data)){numOutputLines++;// Add the text to the collected output.sortOutput.Append(Environment.NewLine + "[" + numOutputLines.ToString() + "] - " + outLine.Data);}}}
}