[WPF]实现TextBox文本框单击全选
2021-01-23 06:15
///
/// Void:设置获取焦点时全选文本
///
/// 指定文本框
public void SetSelectionAllOnGotFocus(TextBox textbox)
{
MouseButtonEventHandler _OnPreviewMouseDown = (sender, e) =>
{
TextBox box = e.Source as TextBox;
box.Focus();
e.Handled = true;
};
RoutedEventHandler _OnLostFocus = (sender, e) =>
{
TextBox box = e.Source as TextBox;
box.PreviewMouseDown += _OnPreviewMouseDown;
};
RoutedEventHandler _OnGotFocus = (sender, e) =>
{
TextBox box = e.Source as TextBox;
box.SelectAll();
box.PreviewMouseDown -= _OnPreviewMouseDown;
};
textbox.PreviewMouseDown += _OnPreviewMouseDown;
textbox.LostFocus += _OnLostFocus;
textbox.GotFocus += _OnGotFocus;
}
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文章标题：[WPF]实现TextBox文本框单击全选
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