CODEWITHSUNDEEP
wpfwinformselementhost
Harsha
Harsha

Reputation: 1879

Resize Form based on ElementHost size

I have a Form(winform) and it contains Elementhost. During run time, i am hosting my WPF Usercontrols to this elementhost. I have used AutoSize = True for elementhost.

Elementhost resizes itself basedon WPF Usercontrol size. But How to resize my form based my ElementHost's size.

Thank you,

Upvotes: 4

Views: 4427

Answers (5)

Geronimo James
Geronimo James

Reputation: 1

It's an old question, but I come by it often, so it's still relevant, so here is my solution:

What I do is:

a. When I want WPF view to match (dock) window size:

ElementHost eh = new ElementHost();
eh.Dock = System.Windows.Forms.DockStyle.Dock;
eh.AutoSize = true;
eh.Child = wpfView;
eh.CreateControl();
this.Controls.Add(eh);
this.AutoSize = false;

NOTE: You can set eh min size to have scrollbars, if form too small.

b: When I want the host Form to match the WPF View:

ElementHost eh = new ElementHost();
eh.Dock = System.Windows.Forms.DockStyle.None;
eh.AutoSize = true;
eh.Child = wpfView;
eh.CreateControl();
this.Controls.Add(eh);
this.AutoSize = true;
this.AutoSizeMode=AutoSizeMode.GrowAndShrink;

Upvotes: 0

Tono Nam
Tono Nam

Reputation: 36048

Instead of setting autosize set:

 this.elementHost1.Dock = System.Windows.Forms.DockStyle.Fill;

Upvotes: 0

Harsha
Harsha

Reputation: 1879

Here is the answer:

After setting the ElementHost.Child to WPF User control. I will following function:

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); 
    }

Original Method posted at: How do I convert a WPF size to physical pixels?

Now I set the client size from new Size.

Upvotes: 2

Pintu Paul
Pintu Paul

Reputation: 399

I have a solution for this, but not sure about output.It worked in WPF Desktop application. what you have to do is set the height and width to NAN (not a number)

this.Width = double.NaN;
this.Height = double.NaN;

Upvotes: 0

Artiom
Artiom

Reputation: 7837

sory, but isn't it possible to subscribe to size changes and update the host form?

Upvotes: 0

Related Questions