protected void Page_Load(object sender, EventArgs e)
{
//找出MasterPage中的Label控制項並給與當前表單名稱
MainMaster masterPage = this.Master as MainMaster;
Label label = masterPage.FindControl("lbPageName") as Label;
label.Text = "發票清單";
var manager = new ReceiptManager();
var list = manager.GetInvoices();
this.repInvoice.DataSource = list;
this.repInvoice.DataBind();
}