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Question

我使用this answer中的示例代码。它有效。

但我需要将标准输入/输出重定向到文件中。 流程启动信息结构包含字段：

public IntPtr hStdInput;
public IntPtr hStdOutput;
public IntPtr hStdError;

我试过这样的事情：

StartupInfo startupInfo = new StartupInfo();
startupInfo.cb = Marshal.SizeOf((object)startupInfo);
startupInfo.dwFlags = 128;

FileStream fs = new FileStream(filePath, FileMode.Open);
startupInfo.hStdInput = fs.Handle;

它不起作用。

如何将文件作为标准输入/输出传递？

UPD1

如何调用CreateProccess：

StartupInfo startupInfo = new StartupInfo();
startupInfo.cb = Marshal.SizeOf((object)startupInfo);
startupInfo.dwFlags = 128;

FileStream fs = new FileStream(filePath, FileMode.Open);
startupInfo.hStdInput = fs.Handle;

Pinvoke.SetErrorMode(ErrorModes.SEM_FAILCRITICALERRORS | ErrorModes.SEM_NOALIGNMENTFAULTEXCEPT | ErrorModes.SEM_NOGPFAULTERRORBOX | ErrorModes.SEM_NOOPENFILEERRORBOX);
CreationFlags dwCreationFlags = CreationFlags.CREATE_BREAKAWAY_FROM_JOB | CreationFlags.CREATE_SUSPENDED | CreationFlags.CREATE_SEPARATE_WOW_VDM;
SecurityAttributes securityAttributes = new SecurityAttributes();
securityAttributes.bInheritHandle = 1;
ProcessInformation pi;

if (!Pinvoke.CreateProcess(null, configuration.RunString, ref securityAttributes, ref securityAttributes, boolInheritHandles: true, dwCreationFlags: dwCreationFlags, lpEnvironment: IntPtr.Zero, lpszCurrentDir: configuration.Directory, startupInfo: ref startupInfo, pi: out pi))
    throw new Win32Exception(Marshal.GetLastWin32Error());

UPD2 即可。 我添加了SetHandleInformation来电，但没有帮助：

FileStream fs = new FileStream(@"C:\input.txt", FileMode.Open, FileAccess.Read);
Pinvoke.SetHandleInformation(fs.Handle, 0x00000001, 0x00000001);
startupInfo.hStdInput = fs.Handle;

Answer 1

基于评论。

1. 将startupInfo.dwFlags设为0x00000100

2. 添加新功能CreateFile：

   [DllImport("kernel32.dll", SetLastError = true)]
   public static extern IntPtr CreateFile(string lpFileName, DesiredAccess dwDesiredAccess, uint dwShareMode, ref SecurityAttributes lpSecurityAttributes, CreationDisposition dwCreationDisposition, uint dwFlagsAndAttributes, IntPtr hTemplateFile);
   

3. 创建输入/输出处理程序：

   var input = Pinvoke.CreateFile(inputFile, DesiredAccess.GENERIC_READ, 0, ref securityAttributes,
               CreationDisposition.OPEN_EXISTING, 0, IntPtr.Zero);
   
   var output = Pinvoke.CreateFile(outputFile, DesiredAccess.GENERIC_WRITE, 0, ref securityAttributes,
                CreationDisposition.CREATE_NEW, 0, IntPtr.Zero);
   
   startupInfo.hStdInput = input;
   startupInfo.hStdOutput = output;
   
   ...
   
   public enum DesiredAccess : uint
   {
       GENERIC_WRITE = 30,
       GENERIC_READ = 31
   }
   
   public enum CreationDisposition : uint
   {
       CREATE_NEW = 1,
       CREATE_ALWAYS = 2,
       OPEN_EXISTING = 3,
       OPEN_ALWAYS = 4,
       TRUNCATE_EXISTING = 5
   }