如何在不创建窗口的情况下将 WPF UserControl 渲染为位图 [英] How to render a WPF UserControl to a bitmap without creating a window

问题描述

如何在不创建窗口的情况下将 WPF UserControl 渲染为位图?我需要呈现 WPF UserControl 并将其上传到另一个程序.位图将通过 Windows 服务呈现，因此创建窗口不是一个选项(我知道有虚拟"创建窗口的方法，但不幸的是，在我的情况下，调用命令来创建窗口的任何内容都不是一个选项).有没有办法渲染用户控件而不将其绑定到窗口?

How can I render a WPF UserControl to a bitmap without creating a window? I need to render a WPF UserControl and upload it to another program. The bitmaps will be rendered through a Windows Service, so creating a window is not an option (I know there's ways to 'virtually' create windows, but unfortunately anything that calls a command to create a window is NOT an option in my case). Is there a way to RENDER the UserControl without binding it to a Window?

推荐答案

最终使用了没有实际窗口的 HwndHost.

Ended up using an HwndHost with no actual window.

void cwind()
    {
        Application myapp = new Application();
        mrenderer = new WPFRenderer();
        mrenderer.Width = 256;
        mrenderer.Height = 256;

        HwndSourceParameters myparms = new HwndSourceParameters();
        HwndSource msrc = new HwndSource(myparms);
        myparms.HwndSourceHook = new HwndSourceHook(ApplicationMessageFilter);

        msrc.RootVisual = mrenderer;
        myapp.Run();
    }
    static IntPtr ApplicationMessageFilter(
IntPtr hwnd, int message, IntPtr wParam, IntPtr lParam, ref bool handled)
    {
        return IntPtr.Zero;
    }

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