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?

Wreath

Answer 1

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

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

Karlene

That was my first thought, but it doesn't do anything. – Wreath

Did you have a look at this post: #1086684 – Karlene

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. – Polyneuritis

@MikedeKlerk Thanks, that works like a charm, in my case with the ElementHost contained within a Panel – Artois

@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 – Ulrikaumeko

Answer 2

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); 
} 

Morse