在 Virtual Box 中还原虚拟机快照时出错

Question

我在我的项目中使用 VirtualBox 和 Virtual Box API Microsoft Com C++。它是 VirtualBox 6.0.6 软件开发工具包 (SDK) 和 VirtualBox 6.0.6 平台包。我有个问题。我想恢复早期创建的快照系统，但程序显示错误。我的代码与评论：HRESULT rc; IVirtualBoxClient *virtualBoxClient = nullptr; IVirtualBox *virtualBox = nullptr; IMachine *machine = nullptr; ISession *session = nullptr; IProgress *progress = nullptr; ISnapshot* snapshot = nullptr; BSTR sessiontype = SysAllocString(L"gui"); BSTR machineName = SysAllocString(L"Win7x64"); HRESULT rc = CoCreateInstance(CLSID_VirtualBoxClient, NULL, CLSCTX_INPROC_SERVER, IID_IVirtualBoxClient, (void**)&virtualBoxClient); rc = virtualBoxClient->get_VirtualBox(&virtualBox); // looking for a machine with a name Win7x64 rc = virtualBox->FindMachine(machineName, &machine); // create a session object rc = CoCreateInstance(CLSID_Session, NULL, CLSCTX_INPROC_SERVER, IID_ISession, (void**)&session); if (!SUCCEEDED(rc)) { printf("Error creating Session instance! rc = 0x%x\n", rc); break; } // block the machine machine->LockMachine(session, LockType::LockType_Shared); // the name of the snapshot system BSTR snapshotUUID = SysAllocString(L"Win7_test_snapshot"); // looking for a snapshot system rc = machine->FindSnapshot(snapshotUUID, &snapshot); // recover snapshot. ERROR: variable rc - E_NOTIMPL Not implemented. rc = machine->RestoreSnapshot(snapshot, &progress); printf("Starting VM, please wait ...\n"); //waiting for the end of the operation. Abnormal termination- progress == nullptr ! rc = progress->WaitForCompletion(-1); // unlocking the machine rc = session->UnlockMachine(); if (!SUCCEEDED(rc)) { printf("Error restore state machine!\n"); break; }此外，我创建了一个简单的 C# 应用程序，并在那里得到了完全相同的错误。怎么了？这是错误的API？我什至多次更改操作系统（虚拟）：你能帮我吗，如何修复调用方法错误“RestoreSnapshot - E_NOTIMPL Not implemented”或者如何正确恢复系统快照？谢谢你。PS：我在官方论坛上问过这个问题，没人帮我。

Answer 1

我找到了问题的解决方案。应使用会话的当前系统恢复快照。所以代码将如下所示：

HRESULT rc = machine->LockMachine(session, LockType::LockType_Shared);

rc = machine->FindSnapshot(snapshotUUID, &snapshot);

IMachine* currentMachine(nullptr);

rc = session->get_Machine(&currentMachine);

rc = currentMachine->RestoreSnapshot(snapshot, &progress);

rc = progress->WaitForCompletion(300000);

rc = session->UnlockMachine();

它适用于此代码。