public void Del(int id)
{
var model = fakedb.GetStudentById(id);
if (model != null)
{
var r = MessageBox.Show($"确认删除当前用户:{model.Name}?", "操作提示", MessageBoxButton.OK, MessageBoxImage.Question);
if (r == MessageBoxResult.OK)
{
fakedb.DelStudent(model.Id);
this.Query();
}
}
}