如何在进入单元格时选择文本

Question

我有一个Grid，当我走过它的单元格时，我进入单元格，但没有选择文本。这很烦人，因为当我需要改变一个值时，我首先需要使用Backspace键。

进入单元格后我能做些什么选择了单元格的内容？

Answer 1

我会建议使用这种行为。下面我已经包括一个最小的实现，它提供我认为功能你正在寻找：

/// <summary> 
/// <see cref="Behavior{T}"/> of <see cref="TextBox"/> for selecting all text when the text box is focused 
/// </summary> 
public class TextBoxSelectOnFocusBehavior : Behavior<TextBox> 
{ 
    private void AssociatedObject_GotFocus(object sender, RoutedEventArgs e) 
    { 
     TextBox textBox = (sender as TextBox); 

     if (textBox != null) 
      textBox.SelectAll(); 
    } 

    /// <summary> 
    /// React to the behavior being attached to an object 
    /// </summary> 
    protected override void OnAttached() 
    { 
     base.OnAttached(); 

     AssociatedObject.GotFocus += AssociatedObject_GotFocus; 
    } 

    /// <summary> 
    /// React to the behavior being detached from an object 
    /// </summary> 
    protected override void OnDetaching() 
    { 
     base.OnDetaching(); 

     AssociatedObject.GotFocus -= AssociatedObject_GotFocus; 
    } 
} 

希望这有助于。