public WimImage(WimFile file, int imageIndex)
{
if (file == null)
{
throw new ArgumentNullException(nameof(file));
}
if (imageIndex > file.ImagesCount)
{
throw new ArgumentOutOfRangeException(nameof(imageIndex), "The index does not exist in the specified WIM file.");
}
_handle = NativeMethods.WIMLoadImage(file.CheckDisposed(), imageIndex);
if (!NativeMethods.WIMGetImageInformation(_handle, out var builder, out var bytes))
{
throw new Win32Exception(Marshal.GetLastWin32Error());
}
// Ensure the length of the returned bytes to avoid garbage characters at the end.
var count = bytes / sizeof(char);
if (null != builder)
{
// Get rid of the unicode file marker at the beginning of the XML.
builder.Remove(0, 1);
builder.EnsureCapacity(count - 1);
builder.Length = count - 1;
// This isn't likely to change while we have the image open, so cache it.
var xml = XDocument.Parse(builder.ToString().Trim());
_xmlElement = xml.Root;
}
}
internal WimFileErrorEventArgs(WimFile file, WIM_MSG message, IntPtr wParam, IntPtr lParam)
: base(message, wParam, lParam)
{
Path = Marshal.PtrToStringUni(wParam);
RelativePath = file.GetRelativePath(Path);
ErrorCode = lParam.ToInt32();
if (ErrorCode != 0)
{
ErrorMessage = new Win32Exception(ErrorCode).Message;
}
}
internal WimFileProcessEventArgs(WimFile file, WIM_MSG message, IntPtr wParam, IntPtr lParam)
: base(message, wParam, lParam)
{
Path = Marshal.PtrToStringUni(wParam);
RelativePath = file.GetRelativePath(Path);
}