如何知道光标在哪一行

Question

如何知道用户在RichEditBox中点击键盘中的Enter

此代码不工作

  private void Editor_KeyDown(object sender, KeyRoutedEventArgs e)
  {
      var dia = new MessageDialog(e.Key + "");
      dia.ShowAsync();
  }

 private void Editor_KeyDown(object sender, KeyRoutedEventArgs e)
 {
     if (e.OriginalKey == (VirtualKey)(char)13)
     {
         NumberEditor.Text += Convert.ToString(_LineNum) + Environment.NewLine;
         ++_LineNum;
     }
 }

如何在RichEditBox中获得行，如何从RichEditBox中更改代码文本?

我想做一个编辑器，任何帮助都很感激。

对

Answer 1

看这个方法:

   private void ChangeLine()
    {
        var textRange = MyRichEditBox.Document.GetRange(MyRichEditBox.Document.Selection.StartPosition, MyRichEditBox.Document.Selection.StartPosition);
        textRange.Expand(TextRangeUnit.Line);
        //Change line size.
        textRange.CharacterFormat.Size = 30;
        //Center the paragraph
        textRange.ParagraphFormat.Alignment = ParagraphAlignment.Center;
        //this will change text of the range
        textRange.Text = "My new text";
    }

你必须从Document中获取ITextRange。之后，您可以将其展开为TextRangeUnit。排队，得到整条线。现在您可以更改该行的样式和文本。

试试KeyDownEvent:

 public sealed partial class TextEditPage : Page
{
    private readonly KeyEventHandler _keyDownHandler;
    //Constructor
    public TextEditPage()
    {
        this.InitializeComponent();
        this.Unloaded += OnUnloaded;
        //Add keydown event
        this._keyDownHandler = OnKeyDown;
        RtfBox.AddHandler(KeyDownEvent, this._keyDownHandler, true);
    }
    private void OnKeyDown(KeyRoutedEventArgs e)
    {
        //enter your code here
    }
    private void OnUnloaded(object sender, RoutedEventArgs routedEventArgs)
    {
        this.RemoveHandler(KeyDownEvent, _keyDownHandler);
    }
}