Managed .NET Equivalent to CreateFile & WriteFile from WinBase (kernel32.dll)
- by StevenH
I am working with a legacy file format.
The file is created using unmanaged C++ that utilizes the WinBase.h CreateFile() & WriteFile() functions (found in the kernel32.dll).
I have been using P/Invoke interop to access these native functions like so:
[DllImport("kernel32.dll")]
public static extern bool WriteFile(
IntPtr hFile,
byte[] lpBuffer,
uint nNumberOfBytesToWrite,
out uint lpNumberOfBytesWritten,
[In] ref NativeOverlapped lpOverlapped);
[DllImport("kernel32.dll", SetLastError = true)]
public static extern bool WriteFileEx(
IntPtr hFile,
byte[] lpBuffer,
uint nNumberOfBytesToWrite,
[In] ref NativeOverlapped lpOverlapped,
WriteFileCompletionDelegate lpCompletionRoutine);
[DllImport("kernel32.dll", SetLastError = true)]
public static extern IntPtr CreateFile(
string lpFileName, uint dwDesiredAccess,
uint dwShareMode, IntPtr lpSecurityAttributes,
uint dwCreationDisposition,
uint dwFlagsAndAttributes, IntPtr hTemplateFile);
[DllImport("kernel32.dll", SetLastError = true)]
public static extern bool CloseHandle(IntPtr hObject);
public delegate void WriteFileCompletionDelegate(
UInt32 dwErrorCode,
UInt32 dwNumberOfBytesTransfered,
ref NativeOverlapped lpOverlapped);
The issue with this is when I call WriteFile(), the file is always overwritten by the proceeding call.
I need to find a compatible .NET equivalent that would allow me to produce the exact same format of output.
Thanks.
