Auto size ElementHost to its content

Question

I have a small WPF control that has a TextBlock with TextWrapping set to Wrap. I am trying to host this in an existing WinForms application. I have the ElementHost docked to the top of the form, and I would like to size the height of the ElementHost based on the height that the TextBlock require. Is there any way to accomplish this?

score 5 · Answer 1 · answered Feb 25 '11 at 20:25

5

The resizing mechanism of WinForms is different from WPF's.

Have you tried setting the AutoSize property of the ElementHost to true?

answered Feb 25 '11 at 20:25

Emond

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That was my first thought, but it doesn't do anything. – Brian Kohrs Feb 25 '11 at 21:36
Did you have a look at this post: http://stackoverflow.com/questions/1086184/resize-elementhost-to-size-of-the-hosted-xmal-usercontrol – Emond Feb 25 '11 at 21:39
4

Setting the `AutoSize` property for the `ElementHost` as well as the `AutoSize` for the control that contains the `ElementHost`, in my case a `Form`, works for me. – Mike de Klerk Oct 30 '13 at 06:21
@MikedeKlerk Thanks, that works like a charm, in my case with the `ElementHost` contained within a `Panel` – rucamzu Jan 23 '18 at 12:27
@MikedeKlerk in my case im setting "AutoSize" to both the "ElementHost" and "Form" Onloading window in first time Form size greater then my control size – Sharan RM Jul 26 '21 at 11:04

score 0 · Answer 2 · answered Jan 19 '15 at 16:05

I found the answer here

this is code from the link above:

public System.Windows.Size GetElementPixelSize(UIElement element) 
{ 
    Matrix transformToDevice; 
    var source = PresentationSource.FromVisual(element);
    if (source != null)
        transformToDevice = source.CompositionTarget.TransformToDevice;
    else     
        using (var Hwndsource = new HwndSource(new HwndSourceParameters()))
            transformToDevice = Hwndsource.CompositionTarget.TransformToDevice;


    if (element.DesiredSize == new System.Windows.Size()) 
        element.Measure(new System.Windows.Size(double.PositiveInfinity, double.PositiveInfinity)); 

    return (System.Windows.Size)transformToDevice.Transform((Vector)element.DesiredSize); 
}

Auto size ElementHost to its content

2 Answers2

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