Hi,
VirtualBox 4.2 has introduced a new lock type for VM frontends:
LockType.LockType_VM. You have to use this lock type, otherwise the
Console related objects are not initialized.
Ivo
Op 9-3-2013 7:12, Pavel Murygin schreef:
Hi everybody!
I wrote a virtual box frontend in C# using com api. I haven't touched
my code for about a year. During that year I've moved to a laptop from
pc. Last time I ran my code it worked fine. Now I cannot access
IDisplay because it's null;
here is my code:
var vb = new VirtualBoxClass();
_machine = vb.FindMachine(machineName);
var monitors = _machine.MonitorCount;
Monitors = new MMFFrameBuffer[monitors];
for (byte i = 0; i < monitors; i++)
{
var name = string.Format("monitor{0}", i + 1);
Monitors[i] = MMFFrameBuffer.CreateNew(name)
;
}
_session = new SessionClass();
_machine.LockMachine(_session, LockType.LockType_Shared);
for (int i = 0; i < MonitorsCount; i++)
{
_session.Console.Display.SetFramebuffer((uint) i, Monitors[i]);
}
My program fails on the line where I'm trying to set framebuffer. I
get NullreferenceException: _session.Console.Display is null.
My current version of Vbox is the latest: 4.2.8 r83876. I can't
remember the exact version on which my code ran correctly. I can only
say It was the latest one about 1 year ago. Host OS is Win7 pro x64
(same as it was on my previous PC)
I'm completely clueless about my issue. Any help would be highly
appreciated!
Regrads,
Pavel Murygin.
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