为什么处理打印输出从cmd C＃？ [英] Why Process not printing output from cmd C#?

问题描述

我正在从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）
但是当我这样做从c＃不工作。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; 
 
进程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 exists+ server +（net use+ driveChar +：+ server +/ user：+ user ++ password + ）; 
 //应该打印'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）; 
} 
  

我从这里

编辑：
'Debug'FOR'Console'。

解决方案

您的代码对我来说是正常的， / p>

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

如果您在前面放置一个空格（按预期返回）

其他进程的输出
Microsoft Windows [版本6.1.7601]
其他进程的输出
版权所有（c）2009 Microsoft Corporation。保留所有权利
其他进程的输出

其他进程的输出
C：\Users\me\Documents\Visual Studio 2015 \Projects \ConsoleApplication2 \Conso
leApplication2 \bin\Debug>如果存在\\server01\share（net use Z：\\server01\share
/ user :. ）else（echo false）
其他进程的输出
false
其他进程的输出


I'm tring to get the output from cmd, this command is working fine in the command line: if exist \qwerty (net use T: \querty ) else (echo false) But when I do that from c# doesn't work. Here the methods:

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);
}

I took the code from here

EDIT: Replaced 'Debug' FOR 'Console'.

解决方案

Your code worked fine for me as you would have expected when I made one change

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

If you put a space in front of ( it came back as expected

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

这篇关于为什么处理打印输出从cmd C＃？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！