public static SafeFileHandle CreateSafeFileHandle(
this IStorageFile windowsRuntimeFile,
FileAccess access = FileAccess.ReadWrite,
FileShare share = FileShare.Read,
FileOptions options = FileOptions.None)
{
if (windowsRuntimeFile == null)
{
throw new ArgumentNullException(nameof(windowsRuntimeFile));
}
HANDLE_ACCESS_OPTIONS accessOptions = FileAccessToHandleAccessOptions(access);
HANDLE_SHARING_OPTIONS sharingOptions = FileShareToHandleSharingOptions(share);
HANDLE_OPTIONS handleOptions = FileOptionsToHandleOptions(options);
IStorageItemHandleAccess handleAccess = windowsRuntimeFile.As <IStorageItemHandleAccess>();
if (handleAccess == null)
{
return(null);
}
return(handleAccess.Create(
accessOptions,
sharingOptions,
handleOptions,
IntPtr.Zero));
}
public static SafeFileHandle GetSafeFileHandle(this IStorageItem Item)
{
IntPtr ComInterface = Marshal.GetComInterfaceForObject(Item, typeof(IStorageItemHandleAccess));
IStorageItemHandleAccess StorageHandleAccess = (IStorageItemHandleAccess)Marshal.GetObjectForIUnknown(ComInterface);
const uint READ_FLAG = 0x120089;
const uint WRITE_FLAG = 0x120116;
const uint SHARE_READ_FLAG = 0x1;
StorageHandleAccess.Create(READ_FLAG | WRITE_FLAG, SHARE_READ_FLAG, 0, IntPtr.Zero, out IntPtr handle);
return(new SafeFileHandle(handle, true));
}
public static SafeFileHandle CreateSafeFileHandle(
this IStorageFile windowsRuntimeFile,
FileAccess access = FileAccess.ReadWrite,
FileShare share = FileShare.Read,
FileOptions options = FileOptions.None)
{
if (windowsRuntimeFile == null)
{
throw new ArgumentNullException(nameof(windowsRuntimeFile));
}
HANDLE_ACCESS_OPTIONS accessOptions = FileAccessToHandleAccessOptions(access);
HANDLE_SHARING_OPTIONS sharingOptions = FileShareToHandleSharingOptions(share);
HANDLE_OPTIONS handleOptions = FileOptionsToHandleOptions(options);
IStorageItemHandleAccess handleAccess = ((object)windowsRuntimeFile) as IStorageItemHandleAccess;
if (handleAccess == null)
{
return(null);
}
SafeFileHandle handle;
int result = handleAccess.Create(
accessOptions,
sharingOptions,
handleOptions,
IntPtr.Zero,
out handle);
if (result != 0)
{
throw Win32Marshal.GetExceptionForWin32Error(Win32Marshal.TryMakeWin32ErrorCodeFromHR(result), windowsRuntimeFile.Name);
}
return(handle);
}
