public override void Eject()
{
IntPtr fileHandle = IntPtr.Zero;
try {
// Create an handle to the drive
fileHandle = WindowsAPI.CreateFile(this.CreateDeviceIOPath,
WindowsAPI.GENERICREAD, 0, IntPtr.Zero,
WindowsAPI.OPENEXISTING, 0, IntPtr.Zero);
if ((int)fileHandle != WindowsAPI.INVALID_HANDLE)
{
// Eject the disk
uint returnedBytes;
WindowsAPI.DeviceIoControl(fileHandle, WindowsAPI.IOCTL_STORAGE_EJECT_MEDIA,
IntPtr.Zero, 0,
IntPtr.Zero, 0,
out returnedBytes,
IntPtr.Zero);
}
} catch {
throw new Exception(Marshal.GetLastWin32Error().ToString());
} finally {
// Close Drive Handle
WindowsAPI.CloseHandle(fileHandle);
fileHandle = IntPtr.Zero;
}
}
/// <summary>
/// Creates a FileStream from the specified path, return NULL if fail.
/// </summary>
/// <param name="path"></param>
/// <param name="mode"></param>
/// <param name="access"></param>
/// <param name="share"></param>
/// <param name="bufferSize"></param>
/// <param name="isAsync"></param>
/// <returns></returns>
public static FileStream CreateFileStream(string path, FileMode mode, FileAccess access, FileShare share, int bufferSize, bool isAsync)
{
if (string.IsNullOrWhiteSpace(path))
{
throw new ArgumentException("path is null or empty.", "path");
}
WindowsAPI.FileAccessMode accessMode = WindowsAPI.FileAccessMode.None;
switch (access)
{
case FileAccess.Read:
accessMode = WindowsAPI.FileAccessMode.Read;
break;
case FileAccess.Write:
accessMode = WindowsAPI.FileAccessMode.Write;
break;
case FileAccess.ReadWrite:
accessMode = WindowsAPI.FileAccessMode.Read | WindowsAPI.FileAccessMode.Write;
break;
}
WindowsAPI.FileShareMode shareMode = WindowsAPI.FileShareMode.None;
switch (share)
{
case FileShare.Read:
shareMode = WindowsAPI.FileShareMode.Read;
break;
case FileShare.Write:
shareMode = WindowsAPI.FileShareMode.Write;
break;
case FileShare.ReadWrite:
shareMode = WindowsAPI.FileShareMode.Read | WindowsAPI.FileShareMode.Write;
break;
case FileShare.Delete:
shareMode = WindowsAPI.FileShareMode.Delete;
break;
}
WindowsAPI.FileCreationMode creationMode = WindowsAPI.FileCreationMode.CreateAlways;
switch (mode)
{
case FileMode.Create:
creationMode = WindowsAPI.FileCreationMode.CreateAlways;
break;
case FileMode.CreateNew:
creationMode = WindowsAPI.FileCreationMode.CreateNew;
break;
case FileMode.Open:
case FileMode.Append:
creationMode = WindowsAPI.FileCreationMode.OpenExisting;
break;
case FileMode.OpenOrCreate:
creationMode = WindowsAPI.FileCreationMode.OpenAlways;
break;
case FileMode.Truncate:
creationMode = WindowsAPI.FileCreationMode.TruncateExisting;
break;
}
WindowsAPI.FileFlagAndAttribute flagAndAttribute = WindowsAPI.FileFlagAndAttribute.AttributeNormal;
if (isAsync)
{
flagAndAttribute |= WindowsAPI.FileFlagAndAttribute.FlagOverlapped;
}
FileStream stream = null;
IntPtr ptr = WindowsAPI.CreateFile(path, accessMode, shareMode, IntPtr.Zero, creationMode, flagAndAttribute, IntPtr.Zero);
SafeFileHandle handle = new SafeFileHandle(ptr, true);
if (!handle.IsInvalid)
{
stream = new FileStream(handle, access, bufferSize, isAsync);
}
else
{
handle.Dispose();
}
return(stream);
}
