WPF中TextBox控件对于鼠标单击获取焦点后的全选

 1 void OnLostFocus(object sender, RoutedEventArgs e)

 2         {

 3             TextBox tb = e.Source as TextBox;

 4             tb.PreviewMouseDown += new MouseButtonEventHandler(OnPreviewMouseDown);

 5         }

 6 

 7         void OnPreviewMouseDown(object sender, MouseButtonEventArgs e)

 8         {

 9             TextBox tb = e.Source as TextBox;

10             tb.Focus();

11             e.Handled = true;

12         }

13 

14         void OnGotFocus(object sender, RoutedEventArgs e)

15         {

16             TextBox tb = e.Source as TextBox;

17             tb.SelectAll();

18             tb.PreviewMouseDown -= new MouseButtonEventHandler(OnPreviewMouseDown);

19         }

<TextBox Name="searchTextBox" Background="DarkOrange" HorizontalAlignment="Stretch" MaxLength="15" TextAlignment ="Center" 

     TextChanged="OnSearchTextChange" GotFocus="OnGotFocus" PreviewMouseDown="OnPreviewMouseDown" LostFocus="OnLostFocus">

     输入名称搜索
</TextBox>

　　关键点在于鼠标按下之时

tb.Focus();

e.Handled = true;

由这里引发GotFocus事件 并且设置Handled 标记阻止路由事件继续传播

在GotFocus的事件里面利用tb.SelectAll()全选

tb.PreviewMouseDown -= new MouseButtonEventHandler(OnPreviewMouseDown);

所实现的功能是当第二次单击的时候，不再是全选文字，而是显示光标。

 

第一次发博文，欢迎指正。