WinRt:将RTF字符串绑定到RichEditBox

本文关键字：绑定 RichEditBox 字符串 RTF WinRt | 更新日期: 2023-09-27 18:27:39

搜索了很长时间，将一些RTF文本绑定到Windows应用商店应用程序上的RichEditBox控件。甚至它也应该在TwoMay绑定模式下运行。…

WinRt:将RTF字符串绑定到RichEditBox

。。。最后我找到了以下解决方案。我使用DependencyProperty RtfText从原始RichEditBox控件创建了一个继承的控件。

public class RichEditBoxExtended : RichEditBox
{
    public static readonly DependencyProperty RtfTextProperty = 
        DependencyProperty.Register(
        "RtfText", typeof (string), typeof (RichEditBoxExtended),
        new PropertyMetadata(default(string), RtfTextPropertyChanged));
    private bool _lockChangeExecution;
    public RichEditBoxExtended()
    {
        TextChanged += RichEditBoxExtended_TextChanged;
    }
    public string RtfText
    {
        get { return (string) GetValue(RtfTextProperty); }
        set { SetValue(RtfTextProperty, value); }
    }
    private void RichEditBoxExtended_TextChanged(object sender, RoutedEventArgs e)
    {
        if (!_lockChangeExecution)
        {
            _lockChangeExecution = true;
            string text;
            Document.GetText(TextGetOptions.None, out text);
            if (string.IsNullOrWhiteSpace(text))
            {
                RtfText = "";
            }
            else
            {
                Document.GetText(TextGetOptions.FormatRtf, out text);
                RtfText = text;
            }
            _lockChangeExecution = false;
        }
    }
    private static void RtfTextPropertyChanged(DependencyObject dependencyObject,
        DependencyPropertyChangedEventArgs dependencyPropertyChangedEventArgs)
    {
        var rtb = dependencyObject as RichEditBoxExtended;
        if (rtb == null) return;
        if (!rtb._lockChangeExecution)
        {
            rtb._lockChangeExecution = true;
            rtb.Document.SetText(TextSetOptions.FormatRtf, rtb.RtfText);
            rtb._lockChangeExecution = false;
        }
    }
}

这个解决方案对我有效，也许对其他人也有效。：-）

已知问题：VirtualizingStackPanel中的奇怪行为。VirtualizationMode="Recycling"

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