Question

我要从cmd获取输出，此命令在命令行中正常工作： 如果存在\ qwerty（net use T：\ querty）else（echo false） 但是，当我从c＃那里做到这一点并不起作用。方法如下：

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

获取了代码

编辑：取代＆＃39;调试＆＃39; FOR＆＃39; Console＆＃39;。

Answer 1

如果您的应用程序是＆＃34;命令行应用程序＆＃34;，则应使用Console.WriteLine。

请参阅：

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

以及

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

修改：再次检查原始代码......它已在使用Console.WriteLine。

<强> EDIT2：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);
}

编辑3：好的，我想我已经找到了：尝试在＆＃39;＆＃34; +服务器+＆＃34;＆＃39;之间添加空格。和＆＃39;（网＆＃39; ...：

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

Answer 2

您的代码对我来说没问题，正如您在进行一次更改时所期望的那样

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

如果你在前面放了一个空格（它按预期回来了

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

为什么Process不能从cmd C＃打印输出？

2 个答案: