C#中wpf如何通过HwndHost渲染视频

这篇文章主要为大家展示了"C#中wpf如何通过HwndHost渲染视频"，内容简而易懂，条理清晰，希望能够帮助大家解决疑惑，下面让小编带领大家一起研究并学习一下"C#中wpf如何通过HwndHost渲染视频"这篇文章吧。

一、如何实现

通过继承HwndHost并实现抽象方法即可作为一个带句柄的wpf控件在xaml中使用，代码如下：
win32Api版本：

class NativeHost : HwndHost{    new public IntPtr Handle    {        get { return (IntPtr)GetValue(HandleProperty); }        set { SetValue(HandleProperty, value); }    }    // Using a DependencyProperty as the backing store for Hwnd.  This enables animation, styling, binding, etc...    public static readonly DependencyProperty HandleProperty =        DependencyProperty.Register("Handle", typeof(IntPtr), typeof(NativeHost), new PropertyMetadata(IntPtr.Zero));    protected override HandleRef BuildWindowCore(HandleRef hwndParent)    {        Handle = CreateWindowEx(            0, "static", "",            WS_CHILD | WS_VISIBLE | LBS_NOTIFY,            0, 0,            (int)Width, (int)Height,            hwndParent.Handle,            IntPtr.Zero,            IntPtr.Zero,            0);        return new HandleRef(this, Handle);    }    protected override void DestroyWindowCore(HandleRef hwnd)    {        DestroyWindow(hwnd.Handle);    }    const int WS_CHILD = 0x40000000;    const int WS_VISIBLE = 0x10000000;    const int LBS_NOTIFY = 0x001;    [DllImport("user32.dll")]    internal static extern IntPtr CreateWindowEx(int exStyle, string className, string windowName, int style, int x, int y, int width, int height, IntPtr hwndParent, IntPtr hMenu, IntPtr hInstance, [MarshalAs(UnmanagedType.AsAny)] object pvParam);    [DllImport("user32.dll")]    static extern bool DestroyWindow(IntPtr hwnd);}

HwndSource版本：

class NativeHost : HwndHost{    new public IntPtr Handle    {        get { return (IntPtr)GetValue(HandleProperty); }        set { SetValue(HandleProperty, value); }    }    // Using a DependencyProperty as the backing store for Hwnd.  This enables animation, styling, binding, etc...    public static readonly DependencyProperty HandleProperty =        DependencyProperty.Register("Handle", typeof(IntPtr), typeof(NativeHost), new PropertyMetadata(IntPtr.Zero));    HwndSource _source;    protected override HandleRef BuildWindowCore(HandleRef hwndParent)    {        _source = new HwndSource(0, WS_CHILD | WS_VISIBLE | LBS_NOTIFY, 0,0,0, (int)Width, (int)Height, "nativeHost", hwndParent.Handle);        Handle = _source.Handle;        return new HandleRef(this,Handle);    }    protected override void DestroyWindowCore(HandleRef hwnd)    {        _source.Dispose();    }    const int WS_CHILD = 0x40000000;    const int WS_VISIBLE = 0x10000000;    const int LBS_NOTIFY = 0x001;}

二、使用方式

直接在xaml中使用上述实现的控件：

在Loaded事件中才能获取到句柄，在此事件之前句柄还没有生成。

private void Window_Loaded(object sender, RoutedEventArgs e){    //获取控件句柄    var hwnd=NH_Plane.Handle    //通过句柄进行渲染}

三、示例

示例代码：
https://download.csdn.net/download/u013113678/40304426
注：示例代码与文本所有代码基本一致，渲染部分在c++的dll不可见，请根据需要下载。
效果预览：

以上是"C#中wpf如何通过HwndHost渲染视频"这篇文章的所有内容，感谢各位的阅读！相信大家都有了一定的了解，希望分享的内容对大家有所帮助，如果还想学习更多知识，欢迎关注行业资讯频道！