Snapshots
The RadWebCam control allows you to snapshot the currently displayed video feed.
This can be done via the "Take snapshot" button of the control, or the TakeSnapshot method. When the snapshot is saved the SnapshotTaken event is raised, where you can get the BitmapSource object with the assocaited frame's image.
When the PreviewSnapshots property is true the SnapshotTaken event is raised only after the snapshot is saved. When the property is false, the event is raised immediately after you click on the "Take snapshot" button, or after you call the TakeSnapshot method.
Take snapshot button
Taking a snapshot in code
public MainWindow()
{
InitializeComponent();
this.radWebCam.SnapshotTaken += RadWebCam_SnapshotTaken;
}
public void OnTakeSnapshot()
{
this.radWebCam.TakeSnapshot();
}
private void RadWebCam_SnapshotTaken(object sender, SnapshotTakenEventArgs e)
{
BitmapSource snapshot = e.Snapshot;
// here you save the source to a file, in memory, or to show it in the UI
}
Public Sub New()
InitializeComponent()
Me.radWebCam.SnapshotTaken += AddressOf RadWebCam_SnapshotTaken
End Sub
Public Sub OnTakeSnapshot()
Me.radWebCam.TakeSnapshot()
End Sub
Private Sub RadWebCam_SnapshotTaken(ByVal sender As Object, ByVal e As SnapshotTakenEventArgs)
Dim snapshot As BitmapSource = e.Snapshot
' here you save the source to a file, in memory, or to show it in the UI
End Sub
To discard the snapshot preview, call the DiscardSnapshot method of RadWebCam. The method works only when a snapshot is taken and is currently being previewed.
Additionally, there is a SaveSnapshot method which fires the SnapshotTaken event. The method works only when a snapshot is taken and is currently being previewed.
Preview Snapshots
By default when you take a snapshot a preview of the image will be shown. To disable this, set the PreviewSnapshots property to False.
Disable snapshots preview in XAML
<telerik:RadWebCam PreviewSnapshots="False" />
Disable snapshots preview in code
this.radWebCam.PreviewSnapshots = false;
Me.radWebCam.PreviewSnapshots = False
You can indicate if the snapshot preview is displayed via the IsPreviewingSnapshot property of RadWebCam.