vb.net – 读取控制台流程输出

发布时间：2020-12-17 07:23:54 所属栏目：百科来源：网络整理

导读：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 =

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,当尝试’ReadToEnd’时应用程序似乎暂停,我认为这是因为控制台进程是一个连续的输出,并且永远不会真正结束. ‘ReadLine’工作正常,但只获得第一行,但我需要在该阶段控制台的全部内容.

我怎么解决这个问题？

解决方法

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

（编辑：李大同）

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