更新数据库中的数据（在datagrid中更改时）和datagrid中的数据（添加新数据时）

Question

问题是 - 当我在datagrid中编辑某个时 - 它不会改变数据库中的任何内容。当我在数据库中添加另一个窗口新数据时 - 直到我重新启动程序才会显示新数据。如何将数据库添加到数据库并在datagrid中查看并更改数据网格中的数据并在数据库中更改？ 我的teachertable.cs

public partial class TeachersTable : Window
{
    public TeachersTable()
    {
        InitializeComponent();
    }
    CourseWorkFinal.University0DataSet university0DataSet;
    CourseWorkFinal.University0DataSetTableAdapters.TeachersTableAdapter university0DataSetTeachersTableAdapter;
    private void Window_Loaded(object sender, RoutedEventArgs e)
    {

        university0DataSet = ((CourseWorkFinal.University0DataSet)(this.FindResource("university0DataSet")));
        // Load data into the table Teachers. You can modify this code as needed.
        university0DataSetTeachersTableAdapter = new CourseWorkFinal.University0DataSetTableAdapters.TeachersTableAdapter();
        university0DataSetTeachersTableAdapter.Fill(university0DataSet.Teachers);
        System.Windows.Data.CollectionViewSource teachersViewSource = ((System.Windows.Data.CollectionViewSource)(this.FindResource("teachersViewSource")));
        teachersViewSource.View.MoveCurrentToFirst();
        university0DataSet.Teachers.TeachersRowChanged += new University0DataSet.TeachersRowChangeEventHandler(Modify);
        university0DataSet.Teachers.TeachersRowDeleted +=
            new University0DataSet.TeachersRowChangeEventHandler(Modify);

    }

    void Modify(object sender, University0DataSet.TeachersRowChangeEvent e)
    {
        university0DataSetTeachersTableAdapter.Update(university0DataSet.Teachers);
    }

    private void Button_Click(object sender, RoutedEventArgs e)
    {
        AddTeacher x = new AddTeacher();
        x.Show();
    }

    private void Button_Click_1(object sender, RoutedEventArgs e)
    {
        university0DataSetTeachersTableAdapter.Update(university0DataSet.Teachers);
    }