After a few minutes, we got a WPF RichText Editor as below. So, we quickly created a new user control called RichTextEditor.xaml and place a RichTextbox with our attached property. You can now simply bind this attached property with a string instead of a flow document.Īfter implementing the binding support for WPF RichTextbox, we got a new requirement that we need to develop a RichText Editor (something like TinyMCE) as well. Public static void SetBoundDocument(DependencyObject dp, string value) Return dp.GetValue(BoundDocument) as string Public static string GetBoundDocument(DependencyObject dp) TODO: TextChanged is currently not working! ![]() Private static void HandleTextChanged( object sender, RoutedEventArgs e) Using (MemoryStream ms = new MemoryStream()) Private static void HandleLostFocus( object sender, RoutedEventArgs e) Private static void AttachEventHandler(RichTextBox box) If (binding.UpdateSourceTrigger = UpdateSourceTrigger.Default ||īinding.UpdateSourceTrigger = UpdateSourceTrigger.LostFocus) Private static void RemoveEventHandler(RichTextBox box)īinding binding = BindingOperations.GetBinding(box, BoundDocument) Section section = XamlReader.Load(xamlMemoryStream, parser) as Section ParserContext parser = new ParserContext() Private static void OnBoundDocumentChanged(DependencyObject d, Typeof( string), typeof(RichTextboxAssistant),įrameworkPropertyMetadataOptions.BindsTwoWayByDefault, Public static readonly DependencyProperty BoundDocument =ĭependencyProperty.RegisterAttached( " BoundDocument", As you can see, it's a bit complicated than before since we are handling all complex things there. So, the new code will be like the one shown below. What did we do? We decided to change Document property, a FlowDocument type, to " BoundDocument" which is a string datatype. we also got the same feeling when we were implementing this feature. it's true that using FlowDocument is not so simple compared to a string datatype. OMG! why it's so hard to use FlowDocument? How come we need to call Content.Start and End just to get the text? Why not have a property called Text which is a string datatype? Private static void DocumentChanged(DependencyObject obj,ĭebug.WriteLine( " Document has changed") New PropertyMetadata( new Propert圜hangedCallback(DocumentChanged))) Public static readonly DependencyProperty DocumentProperty =ĭependencyProperty.Register( " Document", Please take a look at siz's implementation as below (link: ref).Ĭlass RichTextboxAssistant : DependencyObject So, you can create an attached property by wrapping RichTextbox.Document property. The first thing that you might notice is that RichTextbox has the Document property. for now.) We will follow this approach to implement the binding support in RichTextbox as well. (Forget about encrypting the password in memory, etc. You can take a look at how Sam implemented the binding support for Passwordbox in his post. For example: AA property to B Control, etc. There may be a lot of definitions for it but the way I understand is that it is a custom property that can be attached to the control. Well, we probably need to have a custom property that can be bindable in that control so the first thing that comes to my mind is the attached property. IMO, the Rich Textbox should be bindable but I'm not sure why Document property of RichText is not a dependency property in WPF (someone can ask me this question?) but people like us who are using MVVM pattern need to have a binding between RichTextbox and the property of ViewModel. ContentsĪ lot of people asked how to bind RichTextbox on the net. In this post, I will brief you how to make WPF RichTextbox bindable, how to display the HTML in WPF, how to create a RichTextbox Editor with toolbar. As we all know, the built-in WPF RichTexbox doesn't provide some features that we are looking for, so if you are in need of using RichTexbox in a WPF project, you should know that you will need to roll your own implementation (at least) a bit. This post will give you some tips/tricks of using RichTextbox in WPF. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |