private void editRoom_MouseUp(object sender, MouseButtonEventArgs e)
        {
            DataRowView row = (DataRowView)roomsGrid.SelectedItem;

            if (row != null)
            {
                int    id       = (int)row["ID"];
                string name     = (string)row["Name"];
                int    size     = (int)row["Size"];
                string code     = (string)row["Code"];
                string building = (string)row["Building"];
                string note     = (string)row["Note"];

                RoomAddEdit addEdit = new RoomAddEdit();
                addEdit.Closed += (s, eventarg) =>
                {
                    rooms_Initialized(s, eventarg);
                };
                addEdit.Owner         = this;
                addEdit.txtId.Text    = id.ToString();
                addEdit.txtName.Text  = name;
                addEdit.txtSize.Text  = size.ToString();
                addEdit.txtCode.Text  = code;
                addEdit.txtNote.Text  = note;
                addEdit.comboBox.Text = building;
                addEdit.ShowDialog();
            }
            else
            {
                System.Windows.MessageBox.Show("Please select a row to edit!", "Information", MessageBoxButton.OK, MessageBoxImage.Exclamation);
            }
        }
        private void addRoom_MouseUp(object sender, MouseButtonEventArgs e)
        {
            RoomAddEdit addEdit = new RoomAddEdit();

            addEdit.Closed += (s, eventarg) =>
            {
                rooms_Initialized(s, eventarg);
            };
            addEdit.Owner = this;
            addEdit.ShowDialog();
        }