AvalonEdit 未在 CompletionWindow 中显示 KeyDown 事件的数据

Question

我使用 AvalonEdit 作为我的 TextEditor，并且在从 Key_Down 按钮调用 CodeCompletionWindow 时没有显示数据，但是当作为 Text_Entered 事件处理时一切正常。下面是示例代码

[Serializable]
public class CodeEditor : TextEditor
{
    public CompletionWindow CompletionWindow = null;
    public CodeEditor()
    {
        //CompletionWindow pops up without any data.
        this.TextArea.KeyDown += TextArea_KeyDown; 
        //CompletionWindow pops up and data is displayed.
        this.TextArea.TextEntered += this.OnTextEntered;
    }

    void TextArea_KeyDown(object sender, KeyEventArgs e)
    {
        if (e.Key == Key.Space && (Keyboard.Modifiers & ModifierKeys.Control) == ModifierKeys.Control)
        {
            ShowCompletion("");
        }
    }

    void OnTextEntered(object sender, TextCompositionEventArgs e)
    {
        //e.Handled = true;

        if (e.Text == "\n" || e.Text == "\t" || e.Text == " ")
        {
            return;
        }

        this.ShowCompletion(e.Text);
    }

    private void ShowCompletion(string enteredText)
    {
        CompletionWindow = new CompletionWindow(TextArea);
        IList<ICompletionData> data = CompletionWindow.CompletionList.CompletionData;
        data.Add("ABC");
        CompletionWindow.Show();
        CompletionWindow.Closed += delegate
        {
            CompletionWindow = null;
        };
    }
}

Answer 1

得到了答案。在 KeyDown 事件处理程序中添加了 e.Handled = true。

工作代码。

void TextArea_KeyDown(object sender, KeyEventArgs e)
{
    if (e.Key == Key.Space && (Keyboard.Modifiers & ModifierKeys.Control) == ModifierKeys.Control)
    {
        ShowCompletion("");
        e.Handled = true;
    }
}