Question

WPF问题，richtextbox控件能绑定到数据表中的一个字段吗？怎么做？ listbox选中当前项的事件是什么呢？

Answer 1

listbox里只有SelectionChanged事件用来对选中的当前项进行操作；
RichTextBox 的绑定需要自己写的方法类的，我给你代码吧~
xaml:
<RichTextBox local:RichTextBoxHelper.DocumentXaml="{Binding 字段名}" />
方法类 RichTextBoxHelper.cs
using System.IO; using System.Text; using System.Windows; using System.Windows.Controls; using System.Windows.Documents; public class RichTextBoxHelper : DependencyObject { public static string GetDocumentXaml(DependencyObject obj) { return (string)obj.GetValue(DocumentXamlProperty); } public static void SetDocumentXaml(DependencyObject obj, string value) { obj.SetValue(DocumentXamlProperty, value); } public static readonly DependencyProperty DocumentXamlProperty = DependencyProperty.RegisterAttached( "DocumentXaml", typeof(string), typeof(RichTextBoxHelper), new FrameworkPropertyMetadata { BindsTwoWayByDefault = true, PropertyChangedCallback = (obj, e) => { var richTextBox = (RichTextBox)obj; // Parse the XAML to a document (or use XamlReader.Parse()) var xaml = GetDocumentXaml(richTextBox); var doc = new FlowDocument(); var range = new TextRange(doc.ContentStart, doc.ContentEnd); range.Load(new MemoryStream(Encoding.UTF8.GetBytes(xaml)), DataFormats.Xaml); // Set the document richTextBox.Document = doc; // When the document changes update the source range.Changed += (obj2, e2) => { if(richTextBox.Document==doc) { MemoryStream buffer = new MemoryStream(); range.Save(buffer, DataFormats.Xaml); SetDocumentXaml(richTextBox, Encoding.UTF8.GetString(buffer.ToArray())); } }; }}); } 呵呵，代码有点乱，不好意思= =

Answer 2

111