vb.net如何将带空格的字符串传递到命令行 [英] vb.net How to pass a string with spaces to the command line

问题描述

我正在尝试使用Process调用外部程序：

I am trying to call an external program using Process:

    Dim strExe As String = "E:\Projects\Common Files\mktorrent.exe"
    Dim p As New Process
    Dim pinfo As New ProcessStartInfo
    pinfo.UseShellExecute = False
    pinfo.RedirectStandardOutput = True
    pinfo.Arguments = " -a http://blah.com/announce.php -l " & FileSizeMarker & " " & fn
    pinfo.FileName = strExe
    pinfo.WorkingDirectory = fn.Substring(0, fn.LastIndexOf("\"))
    pinfo.WindowStyle = ProcessWindowStyle.Normal
    pinfo.CreateNoWindow = True
    p.StartInfo = pinfo
    p.Start()

问题在于文件名（上面的变量fn）。如果有空格，则命令会阻塞-没有空格，则可以正常工作。我尝试添加1、2或3个引号，例如：

The problem is with the filename (variable fn above). If it has spaces, the command chokes - without spaces, it works fine. I have tried adding 1, 2 or3 quotes, like this:

    fn = Chr(34) & Chr(34) & Chr(34) & fn & Chr(34) & Chr(34) & Chr(34)

，而且

    fn = "\") & Chr(34) & fn & "\"& Chr(34)

和许多其他组合，但仍然给我一个错误。关于如何使它起作用的任何想法？
TIA

and many other combinations, but it still gives me an error. Any thoughts on how I can get this to work? TIA

推荐答案

工作原理：

Dim current_path, current_rulename, cmd1 as STRING

current_path = "C:\this folder\file name.exe"    
current_rulename = "file name.exe"

cmd1 = "netsh advfirewall firewall add rule name = """ + current_rulename + """ dir = in action = block program = """ + current_path + """"
cmd1 &= " & "
cmd1 &= "netsh advfirewall firewall add rule name = """ + current_rulename + """ dir = out action = block program = """ + current_path + """"
cmd1 &= " & pause"

Process.Start("cmd", "/c " + cmd1)

基本上，带空格的变量需要这样括起来：

Basically, the variables with spaces need to be enclosed like this:

""" + string_with_spaces + """

分为几部分：

cmd1 = 
"
netsh advfirewall firewall add rule name = 
""" + current_rulename + """
dir=in action=block
program=
""" + current_path + """
"

此代码连接两个单独的命令，这些命令使用带空格的STRINGS。

This code joins two separate commands that use STRINGS with spaces.

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