1.通过nuget安装 osklib.wpf 

2.在textbox getFoucs中敲入如下代码即可实现获得焦点弹出软键盘

        private void txtPLC_IP_GotFocus(object sender, RoutedEventArgs e){try{//  Osklib.OnScreenKeyboard.Close();Osklib.OnScreenKeyboard.Show();}catch (Exception ex){MessageBox.Show(ex.Message);} }

 3.如果界面上的textbox比较，就直接在窗体事件中写。注意第一句为判断是否为textbox

        private void Grid_GotFocus(object sender, RoutedEventArgs e){if (!(e.OriginalSource is TextBox))return;try{Osklib.OnScreenKeyboard.Show();}catch (Exception ex){MessageBox.Show(ex.Message);}}