//全体键盘托管
        private void Window_PreviewKeyDown_1(object sender, KeyEventArgs e)
        {
            //换肤
            switch (e.Key)
            {
            case Key.F1: SetSkin(skin.Starry); break;

            case Key.F2: SetSkin(skin.ColorBox); break;

            case Key.D1: SetStatus(status.Info); break;

            case Key.D2: SetStatus(status.Table); break;

            case Key.D3:
                RentTable rt = new RentTable(DatabaseLinker.GetDateRentTable(Schedule.CurrDate).GetFromDateClass(Schedule.CurrDate, Schedule.CurrClass));
                new WindowClassroomList(rt, this).ShowDialog();
                break;

            case Key.D4: SetStatus(status.Message); break;
            }

            switch (currStatus)
            {
            case status.Table:
                //课程表控制
                if (!TextBoxCId.IsKeyboardFocused)
                {
                    switch (e.Key)
                    {
                    case Key.Up: if (Schedule.CurrClass > 1)
                        {
                            --Schedule.CurrClass;
                        }
                        break;

                    case Key.Down: if (Schedule.CurrClass < cntRow)
                        {
                            ++Schedule.CurrClass;
                        }
                        break;

                    case Key.Left: if (Schedule.CurrDate > RentTime.FirstDate)
                        {
                            Schedule.CurrDate -= new TimeSpan(1, 0, 0, 0);
                        }
                        break;

                    case Key.Right: if (Schedule.CurrDate < RentTime.LastDate)
                        {
                            Schedule.CurrDate += new TimeSpan(1, 0, 0, 0);
                        }
                        break;

                    case Key.Home: Schedule.CurrClass = 1; break;

                    case Key.End: Schedule.CurrClass = cntRow; break;

                    case Key.PageUp: if (Schedule.CurrWeek > 1)
                        {
                            Schedule.CurrDate -= new TimeSpan(7, 0, 0, 0);
                        }
                        break;

                    case Key.PageDown: if (Schedule.CurrWeek < 23)
                        {
                            Schedule.CurrDate += new TimeSpan(7, 0, 0, 0);
                        }
                        break;

                    case Key.Enter:
                        Rent r = sch1.ChosenRent;
                        if (r == null)
                        {
                            break;
                        }
                        new WindowRent(r, this).ShowDialog();
                        break;
                    }
                    SetDateClass(Schedule.CurrDate, Schedule.CurrClass);
                }
                else
                //教室控制
                {
                    int b, c;
                    if (classroom == null)
                    {
                        b = 0; c = 0;
                    }
                    else
                    {
                        b = classroom.Building.bId; c = classroom.cId;
                    }

                    switch (e.Key)
                    {
                    case Key.Up:
                        while (c < Classroom.MaxCId)
                        {
                            ++c;
                            if (Building.GetClassroom(c) != null)
                            {
                                break;
                            }
                        }
                        break;

                    case Key.Down:
                        while (c > Classroom.MinCId)
                        {
                            --c;
                            if (Building.GetClassroom(c) != null)
                            {
                                break;
                            }
                        }
                        break;

                    case Key.PageUp:
                        while (b < Building.MaxBId)
                        {
                            ++b;
                            if (Building.GetBuilding(b) != null)
                            {
                                c = Building.GetBuilding(b).Classrooms[0].cId;
                                break;
                            }
                        }
                        break;

                    case Key.PageDown:
                        while (b > Building.MinBId)
                        {
                            --b;
                            if (Building.GetBuilding(b) != null)
                            {
                                c = Building.GetBuilding(b).Classrooms[0].cId;
                                break;
                            }
                        }
                        break;
                    }
                    SetCId(c);
                }
                break;
            }
        }
        private void LabelClassroom_MouseDown(object sender, MouseButtonEventArgs e)
        {
            RentTable rt = new RentTable(DatabaseLinker.GetDateRentTable(Schedule.CurrDate).GetFromDateClass(Schedule.CurrDate, Schedule.CurrClass));

            new WindowClassroomList(rt, this).ShowDialog();
        }