如果在程序中显示控制台信息

如果在程序中显示控制台信息我在程序中调用windows的命令提示行就是运行"cmd.exe"，然后在命令提示行里运行一个批处理文件。在命令提示行里会出现运行结果.我现在想把这些结果取出来，而且要实行的取出来！不知道有没有办法！高手没有吗？试试用STARTUPINFO重定向。Test.bat内容:dir c:\执行命令:cmd /c c:\Test.bat > c:\Test.txt把Test.txt里的内容读出来即可【如何在VB中截获shell程序的输出】 在Windows环境下的所谓shell程序就是dos命令行程序，比如VC的CL.exe命令行编译器，JDK的javac编译器，启动java程序用的java.exe都是标准的shell程序。截获一个shell程序的输出是很有用的，比如说您可以自己编写一个IDE(集成开发环境)，当用户发出编译指令时候，你可以在后台启动shell 调用编译器并截获它们的输出，对这些输出信息进行分析后在更为友好的用户界面上显示出来。为了方便起见，我们用VB作为本文的演示语言。 通常，系统启动Shell程序时缺省给定了3个I/O信道，标准输入(stdin), 标准输出stdout, 标准错误输出stderr。之所以这么区分是因为在早期的计算机系统如PDP-11的一些限制。那时没有GUI， 将输出分为stdout,stderr可以避免程序的调试信息和正常输出的信息混杂在一起。 通常， shell程序把它们的输出写入标准输出管道(stdout)、把出错信息写入标准错误管道(stderr)。缺省情况下，系统将管道的输出直接送到屏幕，这样一来我们就能看到应用程序运行结果了。 为了捕获一个标准控制台应用程序的输出，我们必须把standOutput和standError管道输出重定向到我们自定义的管道。 下面的代码可以启动一个shell程序,并将其输出截获。 '执行并返回一个命令行程序(shell程序)的标准输出和标准错误输出'通常命令行程序的所有输出都直接送到屏幕上Private Function ExecuteApp(sCmdline As String) As String Dim proc As PROCESS_INFORMATION, ret As Long Dim start As STARTUPINFO Dim sa As SECURITY_ATTRIBUTES Dim hReadPipe As Long '负责读取的管道 Dim hWritePipe As Long '负责Shell程序的标准输出和标准错误输出的管道 Dim sOutput As String '放返回的数据 Dim lngBytesRead As Long, sBuffer As String * 256 sa.nLength = Len(sa) sa.bInheritHandle = True ret = CreatePipe(hReadPipe, hWritePipe, sa, 0) If ret = 0 Then MsgBox "CreatePipe failed. Error: " & Err.LastDllError Exit Function End If start.cb = Len(start) start.dwFlags = STARTF_USESTDHANDLES Or STARTF_USESHOWWINDOW' 把标准输出和标准错误输出重定向到同一个管道中去。start.hStdOutput = hWritePipe start.hStdError = hWritePipe start.wShowWindow = SW_HIDE ’隐含shell程序窗口 ' 启动shell程序, sCmdLine指明执行的路径 ret = CreateProcessA(0&, sCmdline, sa, sa, True, NORMAL_PRIORITY_CLASS, _ 0&, 0&, start, proc) If ret = 0 Then MsgBox "无法建立新进程，错误码：" & Err.LastDllError Exit Function End If ' 本例中不必向shell程序送信息，因此可以先关闭hWritePipe CloseHandle hWritePipe ' 循环读取shell程序的输出，每次读取256个字节。 Do ret = ReadFile(hReadPipe, sBuffer, 256, lngBytesRead, 0&) sOutput = sOutput & Left$(sBuffer, lngBytesRead) Loop While ret <> 0 ' 如果ret=0代表没有更多的信息需要读取了 ' 释放相关资源 CloseHandle proc.hProcess CloseHandle proc.hThread CloseHandle hReadPipe ExecuteApp = sOutput ' 输出结果End Function 我对这个程序进行一些解释。 ret = CreatePipe(hReadPipe, hWritePipe, sa, 0) 大家可以看到，首先我们建立一个匿名管道。该匿名管道稍候将用来取得与被截获的应用程序的联系。其中hReadPipe用来获取shell程序的输出，而hWritePipe可以用来向应用程序发送信息。如同现实世界中的水管一样，水从管道的一端流进从另一端流出。您把水想象为信息，水管就是匿名管道,这样一来就很好理解这段程序了。 然后就是设置shell应用程序的初始属性。 Dwflags可以指示系统在创建新进程时新进程使用了自定义的wShowWindow, hStdInput,hStdOutput和hStdError。（windows显示属性，标准输入，标准输出，标准错误输出。） 再把shell应用程序的标准输出和标准错误输出都定向到我们预先建好的管道中。 代码如下: start.dwFlags = STARTF_USESTDHANDLES Or STARTF_USESHOWWINDOW start.hStdOutput = hWritePipe start.hStdError = hWritePipe 好，现在可以调用建立新进程的函数了： ret = CreateProcessA(0&, sCmdline, sa, sa, True, NORMAL_PRIORITY_CLASS, 0&, 0&, start, proc) 然后，循环读管道里的数据直到无数据可读为止。 Do ret = ReadFile(hReadPipe, sBuffer, 256, lngBytesRead, 0&) '每次读256字节 sOutput = sOutput & Left$(sBuffer, lngBytesRead) '送入一个字符串中 Loop While ret <> 0 '若 ret = 0 表明没有数据等待读?gt;>?nbsp;然后，释放不用的资源。 用法很简单：比如： MsgBox ExecuteApp("c:\windows\command\mem.exe) 是很方便吧？ 不过，这些程序是在NT下的，如果要在95下实现还需要一点点改动。因为如果该函数调用一个纯win32的程序，没问题。可是95是16,win32混合的系统，当你试图调用一个16位的DOS应用程序那么，那么这个办法会导致相关进程挂起。因为这涉及到WindowsNT和Windows 95对shell的不同实现。 在win95中，16位shell程序关闭时并不保证重定向的管道也关闭，这样，当你的程序试图读取一个已经关闭的shell程序的重定向管道时，你的程序就挂了。 那么，有解决办法吗？回答是肯定的。 解决办法就是用一个win32的应用程序作为您的应用程序和shell程序的中间人。中间人程序继承并重定向了主程序的输入输出，然后中间人程序启动指定的shell程序。该shell程序也就继承并重定向了主程序的输入输出。中间人程序一直等到shell程序结束才结束。 当shell程序结束时，中间人程序也结束，同时因为中间人程序是一个win32程序，那么它就会关闭相应的重定向了管道。这样，你的程序可以发现管道已经关闭，便可以跳出循环。你的程序就不会挂起了。 下面是相关的中间人程序C代码的实现： #include #include void main (int argc, char *argv[]){ BOOL bRet = FALSE; STARTUPINFO si = {0}; PROCESS_INFORMATION pi = {0}; // Make child process use this app's standard files. si.cb = sizeof(si); si.dwFlags = STARTF_USESTDHANDLES; si.hStdInput = GetStdHandle (STD_INPUT_HANDLE); si.hStdOutput = GetStdHandle (STD_OUTPUT_HANDLE); si.hStdError = GetStdHandle (STD_ERROR_HANDLE); bRet = CreateProcess (NULL, argv[1], NULL, NULL, TRUE, 0, NULL, NULL, &si, &pi ); if (bRet) { WaitForSingleObject (pi.hProcess, INFINITE); CloseHandle (pi.hProcess); CloseHandle (pi.hThread); }} 把该程序编译为conspawn.exe并放在系统可以调用到的路径目录中。 然后把文章开头提到的代码中的CreateProcessA语句改为： ret = CreateProcessA(0&, "conspawn """ & sCmdline & """", sa, sa, True, NORMAL_PRIORITY_CLASS, 0&, 0&, start, proc) 好，这样一来，我们这个函数可以同时很好的支持WindowsNT和Windows95/98了。 一个办法是使用Shell语句来实现重定向，例如在Windows 9x下可以使用下面的语句将运行结果输出到c:\temp\A.txt。 Shell "Command.com /c net use > c:\temp\A.txt" 例如，可以使用.Text = RunCommand("ipconfig")调用ipconfig命令并将输出存入文本框。 Option Explicit Option Base 0 'Code written by JoshT. Use at your own risk Private Declare Function CreateProcess Lib "kernel32" Alias "CreateProcessA" _ (ByVal lpApplicationName As String, _ ByVal lpCommandLine As String, _ lpProcessAttributes As SECURITY_ATTRIBUTES, _ lpThreadAttributes As SECURITY_ATTRIBUTES, _ ByVal bInheritHandles As Long, _ ByVal dwCreationFlags As Long, _ lpEnvironment As Any, _ ByVal lpCurrentDirectory As String, _ lpStartupInfo As STARTUPINFO, _ lpProcessInformation As PROCESS_INFORMATION) As Long Private Declare Function CloseHandle Lib "kernel32.dll" (ByVal hObject As Long) As Long Private Declare Function ReadFile Lib "kernel32" (ByVal hFile As Long, _ lpBuffer As Any, ByVal nNumberOfBytesToRead As Long, lpNumberOfBytesRead As Long, _ lpOverlapped As Long) As Long Private Declare Function WaitForSingleObject Lib "kernel32" _ (ByVal hHandle As Long, ByVal dwMilliseconds As Long) As Long Private Declare Function CreatePipe Lib "kernel32" (phReadPipe As Long, _ phWritePipe As Long, lpPipeAttributes As SECURITY_ATTRIBUTES, _ ByVal nSize As Long) As Long Private Type STARTUPINFO cb As Long lpReserved As String lpDesktop As String lpTitle As String dwX As Long dwY As Long dwXSize As Long dwYSize As Long dwXCountChars As Long dwYCountChars As Long dwFillAttribute As Long dwFlags As Long wShowWindow As Integer cbReserved2 As Integer lpReserved2 As Long hStdInput As Long hStdOutput As Long hStdError As Long End Type Private Type PROCESS_INFORMATION hProcess As Long hThread As Long dwProcessId As Long dwThreadId As Long End Type Private Type SECURITY_ATTRIBUTES nLength As Long lpSecurityDescriptor As Long bInheritHandle As Long End Type Private Const NORMAL_PRIORITY_CLASS As Long = &H20& Private Const STARTF_USESTDHANDLES As Long = &H100& Private Const STARTF_USESHOWWINDOW As Long = &H1& Private Const SW_HIDE As Long = 0& Private Const INFINITE As Long = &HFFFF& Public Function RunCommand(CommandLine As String) As String Dim si As STARTUPINFO 'used to send info the CreateProcess Dim pi As PROCESS_INFORMATION 'used to receive info about the created process Dim retval As Long 'return value Dim hRead As Long 'the handle to the read end of the pipe Dim hWrite As Long 'the handle to the write end of the pipe Dim sBuffer(0 To 63) As Byte 'the buffer to store data as we read it from the pipe Dim lgSize As Long 'returned number of bytes read by readfile Dim sa As SECURITY_ATTRIBUTES Dim strResult As String 'returned results of the command line 'set up security attributes structure With sa .nLength = Len(sa) .bInheritHandle = 1& 'inherit, needed for this to work .lpSecurityDescriptor = 0& End With 'create our anonymous pipe an check for success ' note we use the default buffer size ' this could cause problems if the process tries to write more than this buffer size retval = CreatePipe(hRead, hWrite, sa, 0&) If retval = 0 Then Debug.Print "CreatePipe Failed" RunCommand = "" Exit Function End If 'set up startup info With si .cb = Len(si) .dwFlags = STARTF_USESTDHANDLES Or STARTF_USESHOWWINDOW 'tell it to use (not ignore) the values below .wShowWindow = SW_HIDE ' .hStdInput = GetStdHandle(STD_INPUT_HANDLE) .hStdOutput = hWrite 'pass the write end of the pipe as the processes standard output ' .hStdError = GetStdHandle(STD_ERROR_HANDLE) End With 'run the command line and check for success retval = CreateProcess(vbNullString, _ CommandLine & vbNullChar, _ sa, _ sa, _ 1&, _ NORMAL_PRIORITY_CLASS, _ ByVal 0&, _ vbNullString, _ si, _ pi) If retval Then 'wait until the command line finishes ' trouble if the app doesn't end, or waits for user input, etc WaitForSingleObject pi.hProcess, INFINITE 'read from the pipe until there's no more (bytes actually read is less than what we told it to) Do While ReadFile(hRead, sBuffer(0), 64, lgSize, ByVal 0&) 'convert byte array to string and append to our result strResult = strResult & StrConv(sBuffer(), vbUnicode) 'TODO = what's in the tail end of the byte array when lgSize is less than 64??? Erase sBuffer() If lgSize <> 64 Then Exit Do Loop 'close the handles of the process CloseHandle pi.hProcess CloseHandle pi.hThread Else Debug.Print "CreateProcess Failed" & vbCrLf End If 'close pipe handles CloseHandle hRead CloseHandle hWrite 'return the command line output RunCommand = Replace(strResult, vbNullChar, "") End Function ============================================引用：www.china-askpro.com这个代码：老外的，也可以实现目的。http://down.5ivb.net/source/file/5ivb_865114.zip不过 MmMVP(有分不要大逆不道.只讲算法不给代码.准备高考谢绝打扰) 这样的代码只能等程序执行完之后一下子取得结果。并不能实时取得结果。如果程序不结束。就取不到结果！可不可以一次只读取控制台的一行。如果这样可以的话就可以采用timer控件实时取得控制台的信息了！大家再想想办法，如何一次只读一行？还有一个，如何能让人可以与控制台进行交互，也就是当控制台需要参数输入的时候。用户输入参数。。。然后再执行！如果分不够，重新开贴！！！