C#：如何使用directshow.net显示此对话框？

Question

如何使用Directshow.net调用此对话框？

Filter graph

Answer 1

假设您有一个IBaseFilter引用，下面这样的代码就可以工作了：

[DllImport("oleaut32.dll", CharSet = CharSet.Auto)]
    internal static extern int OleCreatePropertyFrame(
        IntPtr hwndOwner,
        uint x, uint y,
        [MarshalAs(UnmanagedType.LPWStr)]
        string caption,
        uint objectCount,
        [MarshalAs(UnmanagedType.LPArray, ArraySubType = UnmanagedType.IUnknown)]
        object[] lplpUnk,
        int cPages,
        IntPtr pageClsID,
        Guid lcid,
        uint dwReserved,
        IntPtr lpvReserved);

    public void DisplayPropertyPages(Form form, IBaseFilter filter)
    {
            var propertyPages = filter as ISpecifyPropertyPages;
            DsCAUUID pages;
            FilterInfo info;
            int hr = filter.QueryFilterInfo(out info);
            DsError.ThrowExceptionForHR(hr);
            if (propertyPages == null)
            {
                throw new ApplicationException("IBaseFilter doesn't implement ISpecifyPropertyPages");
            }
            hr = propertyPages.GetPages(out pages);
            DsError.ThrowExceptionForHR(hr);
            var filters = new IBaseFilter[1];
            filters[0] = filter;
            hr = OleCreatePropertyFrame(form.Handle, 0, 0, info.achName, 1, filters,
                pages.cElems, pages.pElems, Guid.Empty, 0, IntPtr.Zero);
            Marshal.FreeCoTaskMem(pages.pElems);
            DsError.ThrowExceptionForHR(hr);
    }

Answer 2

请查看MSDN中OleCreatePropertyFrame()的描述。

Guid lcid is invalid. Result:
Managed Debugging Assistant 'PInvokeStackImbalance' has detected a problem in 'D:\CVS\Dev\Filters\H264\H264mfxEncoder\Samples\C#\H264EncoderTest\bin\Debug\H264EncoderTest.vshost.exe'.
Additional Information: A call to PInvoke function 'H264EncoderTest!H264EncoderTest.CGraph::OleCreatePropertyFrame' has unbalanced the stack. This is likely because the managed PInvoke signature does not match the unmanaged target signature. Check that the calling convention and parameters of the PInvoke signature match the target unmanaged signature.

必须是：

uint lcid and hr = OleCreatePropertyFrame(form.Handle, 0, 0, info.achName, 1, filters, pages.cElems, pages.pElems, 0, 0, IntPtr.Zero);