/// <summary>
/// 填充数据网格
/// </summary>
void FillDataGirdView()
{
//清理数据源、清理列（防止列按钮不断增加）
dataGridView1.DataSource = null;
dataGridView1.Columns.Clear();
dataGridView1.DataSource = TicketDAL.FindList(null);
dataGridView1.Columns["movieName"].HeaderText = "电影名";
dataGridView1.Columns["date"].HeaderText = "上映日期";
dataGridView1.Columns["price"].HeaderText = "票价";
}