C＃：如何使用directshow.net来显示此对话框？ [英] C# : How to use directshow.net to show this dialog?

问题描述

如何使用Directshow.net调用此对话框？

How to call this dialog using Directshow.net?

过滤器图

推荐答案

这样的事情可以工作，假设你有一个IBaseFilter参考：

Something like this would work, assuming you have an IBaseFilter reference:

[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);
    }

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