Get a control's handle in XAML

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Hi forum,

there's a software written in Windows Forms that connects the output of a DirectShow filter graph to a panel.

hr = videoWin.put_Owner( videoPanel.Handle );

How do I obtain the handle of a XAML Rectangle, MediaElement, Border or ContentControl?
And what would be the control to use for displaying a video?

What I have tried:

I have reflected and speculated.

Posted 29-Sep-20 3:46am

lukeer

Updated 29-Sep-20 22:20pm

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2 solutions

Solution 1

If I understand correctly, you seek to play video in WPF and need events possible with it.

Have a look at these:
Playing video - The complete WPF tutorial[^]
MediaElement Class Events (Windows.UI.Xaml.Controls) - Windows UWP applications | Microsoft Docs[^]

Example:

HTML

<Window x:Class="WpfTutorialSamples.Audio_and_Video.MediaPlayerVideoSample"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="MediaPlayerVideoSample" Height="300" Width="300">
    <Grid>
        <MediaElement Source="http://hubblesource.stsci.edu/sources/video/clips/details/images/hst_1.mpg" />
    </Grid>
</Window>

Posted 29-Sep-20 6:59am

Sandeep Mewara

Comments

lukeer 30-Sep-20 4:30am

Actually, I need to display a live video from a USB camera, not from file. What would I have to set MediaElement.Source parameter to to capture from my camera?

Sandeep Mewara 30-Sep-20 4:34am

Make use of:
https://github.com/Sascha-L/WPF-MediaKit

Another example:
https://www.codeproject.com/Articles/285964/WPF-Webcam-Control

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Pete O'Hanlon · Accepted Answer · 2020-09-29T22:21:00

Solution 2

Getting the handle requires a little bit of PresentationSource trickery. Your code will look something like this:

C#

HwndSource hwnd = PresentationSource.FromVisual(theControl) as HwndSource;
if (hwnd != null)
{
  handle = hwnd.Handle;
}

Posted 29-Sep-20 22:21pm

Pete O'Hanlon