Question

在鼠标事件中，我尝试创建TextBox，将其添加到Grid，选择all并聚焦键盘。但是无法让它发挥作用：

private void timeCodeEdit(object sender, MouseEventArgs e)
{
    Grid grid = (Grid) ((Label) sender).Parent;
    TextBox text = new TextBox();
    text.Margin = new Thickness(0, 0, 75, 0);
    text.Text = "aaaa";
    grid.Children.Add(text);
    text.LostFocus += lostFocus;
    Keyboard.Focus(text);
    text.SelectAll();
}

我已尝试Keyboard.Focus(text);和text.Focus();。如果我这样做：

private void lostFocus(object sender, RoutedEventArgs e)
{
    Keyboard.Focus(sender as TextBox);
    e.Handled = true;
}

我得到了StackOverflowException，导致它在焦点后立即失去焦点。

也许有人可以帮我解决这个问题？

Answer 1

我会回答：

text.LostKeyboardFocus += Text_LostKeyboardFocus;

和

private void Text_LostKeyboardFocus(object sender, KeyboardFocusChangedEventArgs e) 
{ 
    var name = ((FrameworkElement)e.NewFocus).Name; 
    Console.Write(name); 
}

帮助我发现我的ScrollViewer正在获得焦点，因此ScrollViewer的Focusable="False"解决了这个问题。

WPF在解决TextBox问题上遇到了麻烦

1 个答案: