如何输出持续活动的CMD

Question

我正在运行一个打开CMD并通过API服务进行连接的应用程序。整天，新的内容都会显示在CMD中，我想将该信息导出到txt中，每次出现新的内容时，都会将该内容附加到同一文件中，或创建一个新文件。没关系

App.exe> /file.txt无效

Answer 1

重定向示例

  command >  filename     # Redirect command output to a file (overwrite)
  command >> filename     # APPEND into a file
  command 2> filename     # Redirect Errors from operation to a file(overwrite)
  command 2>> filename    # APPEND errors to a file
  command 2>&1            # Add errors to results
  command 1>&2            # Add results to errors
  command | command       # This is the basic form of a PowerShell Pipeline

# In PowerShell 3.0+

  command 3> warning.txt  # Write warning output to warning.txt 
  command 4>> verbose.txt # Append verbose.txt with the verbose output 
  command 5>&1            # Writes debug output to the output stream 
  command *> out.txt      # Redirect all streams (output, error, warning, verbose, and debug) to out.txt

您没有针对您的用例显示任何有关如何启动/使用cmd.exe的代码。猜猜这只是让人们试图帮助您。因此，重定向cmd.exe，例如：

$MyOutputFile = C:\MyOutputFile.txt
Start-Process -FilePath c:\windows\system32\cmd.exe -ArgumentList '/c C:\YourCommand.bat' -Wait -NoNewWindow -RedirectStandardOutput $MyOutputFile

最后，因为您已经让我们猜测。如果您是从PowerShell启动进程A，但进程A又是启动进程B，则必须由进程A捕获或重定向进程B的输出。PowerShell无法子如果进程A没有执行，则捕获。

资源

• About Redirection
• How-to: Redirection
• PowerShell Redirection Operators
• Understanding Streams, Redirection, and Write-Host in PowerShell
• Use PowerShell Redirection Operators for Script Flexibility