读取控制台进程输出

Question

我正在尝试使用以下代码读取控制台进程的全部内容（3 秒后）：

Dim NewProcess As New System.Diagnostics.Process()
With NewProcess.StartInfo
    .FileName = EXE_PATH
    .RedirectStandardOutput = True
    .RedirectStandardError = True
    .RedirectStandardInput = True
    .UseShellExecute = False
    .WindowStyle = ProcessWindowStyle.Normal
    .CreateNoWindow = False 
End With

NewProcess.Start()

System.Threading.Thread.Sleep(3000)

MsgBox(NewProcess.StandardOutput.ReadToEnd)

但是，在尝试“ReadToEnd”时，应用程序似乎暂停了，我认为这是因为控制台进程是连续输出，并且永远不会真正结束。 'ReadLine' 工作正常，但只获取第一行，但在那个阶段我需要控制台的全部内容。

我该如何解决这个问题？

Answer 1

我会尝试使用 Process.OutputDataReceived 事件来异步读取输出。

见：http://msdn.microsoft.com/en-us/library/system.diagnostics.process.outputdatareceived.aspx#Y242

Private Shared processOutput As StringBuilder = Nothing

Public Shared Sub StartSomeProcess()
processOutput = new StringBuilder()
Dim NewProcess As New System.Diagnostics.Process()
With NewProcess.StartInfo
    .FileName = EXE_PATH
    .RedirectStandardOutput = True
    .RedirectStandardError = True
    .RedirectStandardInput = True
    .UseShellExecute = False
    .WindowStyle = ProcessWindowStyle.Normal
    .CreateNoWindow = False 
End With

' Set our event handler to asynchronously read the sort output.
AddHandler NewProcess.OutputDataReceived, AddressOf OutputHandler
NewProcess.Start()
NewProcess.BeginOutputReadLine()
NewProcess.WaitForExit()
MsgBox(processOutput.ToString())
End Sub

Private Shared Sub OutputHandler(sendingProcess As Object, outLine As DataReceivedEventArgs)    
         ' Collect the sort command output.
         If Not String.IsNullOrEmpty(outLine.Data) Then    
            ' Add the text to the collected output.
            processOutput.AppendLine(outLine.Data)
         End If
      End Sub 

Answer 2

'用于捕获输出和错误

    AddHandler NewProcess.OutputDataReceived, AddressOf OutputHandler
    AddHandler NewProcess.ErrorDataReceived, AddressOf OutputHandler

    NewProcess.Start()
    NewProcess.BeginOutputReadLine()
    NewProcess.BeginErrorReadLine()