Question

我正在研究世界森林论坛的申请,其中我有一些显示美元数额的文本箱。我只想在案文箱内选择所有内容,只要把重点放在文字箱上。

为了达到同样的目的,我使用了“选择一切”方法,在戈特Focus活动上使用插文,但是它不像希望的那样工作。

让我知道我如何能够发挥作用。成就

Answer 1

on startup, register a global event handler for textbox e.g

 EventManager.RegisterClassHandler(typeof(System.Windows.Controls.Primitives.TextBoxBase), UIElement.GotFocusEvent, new RoutedEventHandler(TextBoxBaseGotFocus));

采用文本BoxBaseGotFocus方法,即:

    private static void TextBoxBaseGotFocus(object sender, RoutedEventArgs e)
{
     // Get the TextBoxBase
     var elem = sender as System.Windows.Controls.Primitives.TextBoxBase;
     if (elem != null)
     {
         elem.SelectAll();
     }
}

Answer 2

你们可以为此建立附属行为,并将之用于所希望的文本箱。 The approch is details here -

http://eladm.wordpress.com/2009/04/02/attapple-behavior/

这些行为守则也可在以下网站查阅:here &

如果您在申请中想到所有文本箱,以不实的方式来考虑,那么:

• 如何在“焦点”的WPF文本Box中选取所有文本

Answer 3

Have you tried handling FocusableChanged event http://msdn.microsoft.com/en-us/library/system.windows.uielement.focusablechanged.aspx

You can check IsFocused inside FocusableChanged event handler. if IsFocused is true, you can call SelectAll Following is the pseudo code

textBox.FocusableChanged += (s,e) =>
{
   if(textBox.IsFocused)
     testBox.SelectAll();
}

EDIT1
As Above is not working, You can try FocusManger.GetFocusedElement.
determining-the-focused-element

public DebugFocusedElementProxy()
{
    var timer = new DispatcherTimer();
    timer.Interval = TimeSpan.FromMilliseconds(100);
    timer.Tick += (o, ea) =>
    {
        var fe = FocusManager.GetFocusedElement();
        if (fe != null)
        {
            var element = fe as FrameworkElement;
            if (!string.IsNullOrEmpty(element.Name) &&
                 String.Equals(element.Name, textBox))
            {
                textBox.SelectAll();
            }
        }
    };
    timer.Start();
}

/ 认识到案文方框SelectAll可能要求打电话到。发送地址:

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