为什么进程不打印 cmd C# 的输出？

Question

我正在尝试从 cmd 获取输出，此命令在命令行中运行良好： 如果存在 \qwerty (net use T: \querty ) else (echo false) 但是当我从 c# 这样做时不起作用。这里的方法：

void mapDrive(String driveChar, string server,string user, string password){

    try
    {               
        ProcessStartInfo procStartInfo;
        procStartInfo=new ProcessStartInfo();
        procStartInfo.FileName = @"C:\windows\system32\cmd.exe";
        procStartInfo.RedirectStandardOutput = true;
        procStartInfo.RedirectStandardError = true;
        procStartInfo.RedirectStandardInput = true;
        procStartInfo.UseShellExecute = false;
        procStartInfo.CreateNoWindow = true;

        Process proc = new Process();
        proc.StartInfo = procStartInfo;
        proc.ErrorDataReceived += cmd_Error;
        proc.OutputDataReceived += cmd_DataReceived;
        proc.EnableRaisingEvents = true;
        proc.Start();
        proc.BeginOutputReadLine();
        proc.BeginErrorReadLine();

        proc.StandardInput.WriteLine(" if exist "+server+"(net use "+driveChar+": "+server+" /user:"+user+" "+password+" ) else (echo false)");
        //it should print 'false'
        proc.WaitForExit();     

    }
    catch (Exception e)
    {
        // MessageBox.Show(e.Message);
    }
}

static void cmd_DataReceived(object sender, DataReceivedEventArgs e)
{
    Console.WriteLine("Output from other process");
    Console.WriteLine(e.Data);
}

static void cmd_Error(object sender, DataReceivedEventArgs e)
{
    Console.WriteLine("Error from other process");
    Console.WriteLine(e.Data);
}

我从here获取代码

编辑： 将“调试”替换为“控制台”。

Answer 1

如果您的应用程序是“命令行应用程序”，则应使用Console.WriteLine。

见：

https://msdn.microsoft.com/en-us/library/zdf6yhx5(v=vs.110).aspx

还有

What's the difference between Console.WriteLine() vs Debug.WriteLine()?

编辑：再次检查原始代码...它已经在使用Console.WriteLine。

编辑2： 我试过这个并为我工作：

static void mapDrive(String driveChar, string server,string user, string password){

    try
    {               
        ProcessStartInfo procStartInfo;
        procStartInfo=new ProcessStartInfo();
        procStartInfo.FileName = @"C:\windows\system32\cmd.exe";
        procStartInfo.RedirectStandardOutput = true;
        procStartInfo.RedirectStandardError = true;
        procStartInfo.RedirectStandardInput = true;
        procStartInfo.UseShellExecute = false;
        procStartInfo.CreateNoWindow = true;

        Process proc = new Process();
        proc.StartInfo = procStartInfo;
        proc.ErrorDataReceived += cmd_Error;
        proc.OutputDataReceived += cmd_DataReceived;
        proc.EnableRaisingEvents = true;
        proc.Start();
        proc.BeginOutputReadLine();
        proc.BeginErrorReadLine();

        proc.StandardInput.WriteLine(" if exist v: (echo true) else (echo false)");
        //it should print 'false'
        proc.WaitForExit();     

    }
    catch (Exception e)
    {
        // MessageBox.Show(e.Message);
    }
}

static void cmd_DataReceived(object sender, DataReceivedEventArgs e)
{
    Console.WriteLine("Output from other process");
    Console.WriteLine(e.Data);
}

static void cmd_Error(object sender, DataReceivedEventArgs e)
{
    Console.WriteLine("Error from other process");
    Console.WriteLine(e.Data);
}

Edit3：好的，我想我找到了： 尝试在 '"+server+"' 和 '(net' 之间添加一个空格...：

proc.StandardInput.WriteLine(" if exist "+server+" (net use "+driveChar+": "+server+" /user:"+user+" "+password+" ) else (echo false)");

Answer 2

当我进行一次更改时，您的代码对我来说运行良好

proc.StandardInput.WriteLine(" if exist "+server+" (net use "+driveChar+": "+server+" /user:"+user+" "+password+" ) else (echo false)");

如果你在 ( 前面放一个空格，它会按预期返回

Output from other process
Microsoft Windows [Version 6.1.7601]
Output from other process
Copyright (c) 2009 Microsoft Corporation.  All rights reserved.
Output from other process

Output from other process
C:\Users\me\Documents\Visual Studio 2015\Projects\ConsoleApplication2\Conso
leApplication2\bin\Debug> if exist \\server01\share (net use Z: \\server01\share
 /user:. . ) else (echo false)
Output from other process
false
Output from other process