Question

我正在运行以下代码来执行来自vb.net app的命令。

    Dim CMDServer As Diagnostics.ProcessStartInfo
    Dim CMDReply As Diagnostics.Process
    CMDServer = New Diagnostics.ProcessStartInfo
    CMDServer.WorkingDirectory = "C:/"
    CMDServer.FileName = "cmd.exe"
    CMDServer.UseShellExecute = False
    CMDServer.RedirectStandardOutput = True
    CMDServer.RedirectStandardError = True
    CMDServer.CreateNoWindow = True
    CMDServer.Arguments = "/C " + command
    CMDReply = Process.Start(CMDServer)
    MsgBox("START")
    Dim Reply As String = ""
    If Not CMDReply.HasExited Then
        CMDReply.WaitForExit()
    End If
    MsgBox("EXIT")
    Try
        Dim ext = CMDReply.ExitCode
        Reply = CMDReply.StandardOutput.ReadToEnd()
        MsgBox(ext.ToString + "   " + Reply)
    Catch ex As Exception
        MsgBox(ex.ToString)
    End Try

它适用于几乎所有命令，但当command="help"程序卡在CMDReply.WaitForExit()上时。任何人都可以解释这里可能出现的问题吗？

Answer 1

标准死锁。首先读取输出然后等待退出。该程序无法退出，直到您已读取其所有输出。代码你只有在适合缓冲区的输出很少时才能工作。

来自Hans Passant的评论

cmd进程没有退出

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