How to Close Form with Wpf User Control in Element Host

Expose an event within your wpf usercontrol and subscribe to that in the windows form.

Close the windows form on trigger.

Howdy

An alternative to the above suggestion would be to create an interface eg iWindowsFormsHostedActions that contains definitions of any number of actions you may want to perform from the wpf control on you winforms host ie your close member.

Your winforms host then implements this interface. Your wpf controls have a property added to them that is of type iWindowsFormHostedAction (good idea here to be consistent with implementing another interface or create yourself an abstract class for consistency and interoperability). So after you create the instance of your wpf control in the winform form you also set the new property = this

At this point you can then simply call the close method on the iWindowsFormHostedAction property.

This method involves just a touch more work upfront but once you have set it up you can add additional functionality very quickly and easily.

Hope that helps

James

Thanks for detailed description James. I see what you mean but not totally. Can you show me that with an example please?

Howdy

Sorry its taken a little while to get back to you, attached you should find some rough pseudo code providing an example of the above description. Im happy to provide any more help you may need.

James

// this is our shared interface for performing actions on our windows host
public interface iWindowsFormsHostedActions
{
  void CloseWindow();
}

// interface to impliment on wpf control
public interface iWpfInteraction
{
  iWindowsFormsHostedActions WinFormsHost {get;set;}
}

//winforms form
public class MainWindow: Form, iWindowsFormsHostedActions
{

public MainWindow()
{
// I assume the following is similiar to how you are adding your wpf control
System.Windows.Forms.Integration.ElementHost host = new System.Windows.Forms.Integration.ElementHost();
System.Windows.UIElement obj = new WpfControl();
((iWpfInteraction)obj).WinFormsHost = this;
host.Child = obj;
host.Dock = DockStyle.Fill;
this.Controls.Add(host);
}

public void CloseWindow()
{
this.Close();
}
}

public class WpfControl : UserControl, iWpfInteraction,iWindowsFormsHostedActions
{
WindowsFormsHostedActions WinFormsHost 
{
get
{
// get logic
}
set
{
// set logic
}
}

public void CloseWindow()
{
if (WinFormsHost != null)
{
WinFormsHost.CloseWindow();
}
}

}

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Thanks for your reply James. While building your sample it get an error like this.
Missing partial modifier on declaration of type 'WpfOnForms.WpfControl'; another partial declaration of this type exists

I generate the  public class WpfControl inside WpfControl.xaml.cs (Changed  WindowsFormsHostedActions --> iWindowsFormsHostedActions )

Where might the error raised from?

Thanks In advance

Good Evening James,
I have download the example and complied. It is working as intended :). This example is going to improve my programming quality by the way. Thanks for your advices and helps :) .