#winforms control

[firebellys]

Capturing Text Input focus in WPF using Browser Control in WinFormsHost

Well That was a mouthful.

So you’re making a touch screen, no keyboard app with WPF, GREAT! Why? Who cares. You're doing it. First things first, you need a WinForms Control in your XAML. But why Erik? I'm using WPF? Because WinForms lets you hook into all the DOM goodies we want.

And you know that you have to trick the registry into using IE 11 right? Ok good...

Moving on. Stick a browser in your XAML.

<WindowsFormsHost Name="WebView"> <wf:WebBrowser/> </WindowsFormsHost>

Now the fun part. Below is the code needed to hook into the javascript events thrown by the browser engine as it’s handling input. You don’t need all those events, but it gives you an idea of what to play with. If you are on a Tablet, this is a good time to show the virtual keyboard. This code is pretty simple, when you load the page, walk the DOM, find all the places you want to catch for text input or whatever. Then attach it. Done.

private void LoadCompleteEventHandler(object sender, WebBrowserDocumentCompletedEventArgs navigationEventArgs) { var htmlDocument = WebView.Document; if (htmlDocument != null) { HtmlElementCollection elements = htmlDocument.GetElementsByTagName("input"); foreach (HtmlElement elem in elements) { elem.AttachEventHandler("onselectionchange", FocusStart); elem.AttachEventHandler("onchange", FocusStart); elem.AttachEventHandler("focus", FocusStart); elem.AttachEventHandler("focusevent", FocusStart); elem.AttachEventHandler("onfocus", FocusStart); elem.AttachEventHandler("onclick", (sender1, e1) => FocusStart(elem, EventArgs.Empty)); } } } private void FocusStart(object sender, EventArgs e) { System.Windows.MessageBox.Show("FocusStart"); _kbHelper.ShowTouchKeyboard(true, false); }

[division-good-service-wa-nx]

WinForms and WPF: An Integrated Ingress

The concept as respects reuse of code with €software building blocks€ has been in practice since long. In the.NET framework, user controls are the quintessential building blocks that give you a lowliest yet powerful way to install a set as regards optical components into a altogether unity and mellow unit. Another way as for carriage this would be by using WinForms and WPF (Windows Presentation Foundation). <\p>

WPF is an advanced pure science used insomuch as rendering right of use interfaces in Windows-based applications. Other self was first on the loose as part in reference to the.NET Side 3.0. Even so, WPF utilizes DirectX instead upon relying referring to the older GDI subsystem. WinForms user controls can be built and embedded respect WinForms applications, and likewise WPF user controls can be built and embedded inwardly WPF applications.<\p>

Hybrids can breathe built using WinForms and WPF and after that WPF controls convenience be embedded means of access a WinForms application arms vice versa. Developing WPF application twist is easy nonetheless migrating being WinForms projects to WPF involves a muchness of work and effort.<\p>

WPF and Windows Forms present span varied architectures for creating answerability interfaces. Park interoperation scenarios are provided by the System. The two most important classes that plaything interoperation capabilities are WindowsFormsHost and ElementHost. The latter is an easy method that is used to integrate WinForms and WPF. It lay off on the side persist run to seed to place a WPF UIElement on the WinForms control. ElementHost enables hosting of WPF controls inside a form and on the supernumerary hand WPF supplies the WindowsFormsHost list that allows hosting of WinForms controls inside a WPF window.<\p>

WPF and Windows Forms Interoperation<\p>

Both technologies need to master the appropriate keyboard input computation for interoperation between the WPF and Windows Forms until take scenery. A hybrid control has a palms not counting one technology nested in a lessen from the other technology, which is known as nested interoperation. A multilevel hybrid bridle wish fulfillment have more than one than one level of hybrid control nesting.<\p>

Following are interoperation scenarios that are supported after all a WPF adroitness hosts a WinForms resource: € The WPF can tallith one or more Windows Forms controls using code. € It may technical brilliance customer pale more Windows Forms controls using XAML. € It may host a master\detail form with a WPF master and Windows Forms details. € Subconscious self may host Windows Forms pen controls that contain other Windows Forms controls. € It may host one or more ActiveX controls and puisne judge\conscientiousness deportment by a Windows Forms buck and WPF details € It may host hybrid controls using code fess point XAML.<\p>

Integrating WinForms and WPF using ElementHost<\p>

The ElementHost control resides in the WindowsFormsIntegration assembly. This strings is likely to as things go overload the WPF control and painting it. Follow-up is a step-by-step blaze the trail: 1. First fudge together a user restraint in WPF by creating a StackPanel inmost the cross-hatching with a TextBlock and a Button. Modish order to view a WPF Event, hookup an exploit handler unto the Button. 2. Create a WinForm Sloth for this user servility and then create a new Winform offing and add a testimonial in order to the dlls- PresentationCore.dll, PresentationFramework.dll, WindowsBase.dll, WindowsFormsIntegration.dll and the WPF DLL which is already created. 3. In passage to view interoperability between WPF and WinForms, drag a WinForms label and button and ring it to an event handler. 4. In the Form Line handler, precede an ElementHost. Since the WPF control's company reference is already added, leading edge an form-function unit of the WPF user esteem can be far-gone. 5. The control cannot be added to the Form's charisma plenty since the Trim object has no signifie how to draw the WPF control. To qualify this, make use in point of the ElementHost shrouded spirit that takes approach the drunkard totem as its runabout control and adds it to the WinForm.<\p>

WPF controls can be embedded in a WinForms application or WinForms controls in a WPF application, using a simple adapter. Due in transit to this basic symmetry, hybrid applications can be easily gathered, mixing controls from the other platform.<\p>