Question

我一直在关注Stackoverflow线程ActiveX control without a form，并且在取得一些成功后，我遇到了障碍。

我似乎能够创建我的AX实例，但我不知道如何访问调用方法的东西。这是我的实施：

class DirectAudio : UserControl, IDisposable
{
private myAxControl myAx;
private Thread axThread;

public DirectAudio()
{
    BuildAx();
}

private void BuildAx()
{
    axThread = new Thread((ThreadStart) delegate
    {
        myAx = new PanasonicOCXControl();
        myAx.CreateControl();
        System.Windows.Forms.Application.Run();
    });
    axThread.SetApartmentState((ApartmentState.STA));
    axThread.IsBackground = true;
    axThread.Start();
}

public void Dispose()
{
    axThread.Abort();
    aX.Dispose();
}

public void Connect(CameraConfig cameraConfig)
{
    try
    {
        myAx.Invoke(new Action(() => myAx.Disconnect()));  //how do I do this??
    }
    catch (Exception ex)
    {
        Logger.ToDebug(ex);
    }            
}
}

当Connect（）方法中的myAx.Invoke运行时，我得到了这个：

{"Invoke or BeginInvoke cannot be called on a control until the window handle has been created."}

我该怎么称呼myAx？

Answer 1

如果您想直接在不使用UI的情况下使用ActiveX，则可以尝试

[DllImport("ole32.dll", PreserveSig = false)]
[
 return :MarshalAs(UnmanagedType.Interface)
]
public static extern object CoCreateInstance([In] ref Guid clsid, [MarshalAs(UnmanagedType.Interface)] object punkOuter, int context, [In] ref Guid iid);

public object createComOCXObject() {
 Guid IID_IUnknown = new Guid("{00000000-0000-0000-C000-000000000046}");

 var clsid = new Guid("{6bf52a52-394a-11d3-b153-00c04f79faa6}"); //your ocx clsid 

 object ocxObj = CoCreateInstance(ref clsid, (object) null, 1, ref IID_IUnknown);
 return ocxObj;
}

您可以在这个问题see link中引用我的答案

在没有UI的WPF中使用ActiveX

1 个答案: