using?System;
using?System.Collections;
using?System.Configuration;
using?System.Data;
using?System.Web;
using?System.Web.Security;
using?System.Web.UI;
using?System.Web.UI.WebControls;
using?System.Web.UI.WebControls.WebParts;
using?System.Web.UI.HtmlControls;

public?partial?class?AccountCenter?:?System.Web.UI.MasterPage
{
????protected?void?Page_Load（object?sender?EventArgs?e）
????{
????????if?（Session[“_userid“]?==?null?||?Session[“_userid“]?==?““?||?Session[“_userid“].ToString（）.Trim（）==““）
????????{
????????????Helper.AlertLocation（Page?“alert（‘對(duì)不起，您沒(méi)有登陸！‘）;location.href=‘Login.aspx‘“）;
????????????return;
????????}

????}
????protected?void?linkButton1_Click1（object?sender?EventArgs?e）
????{
????????Session[“_userid“]?=?null;
????????Session.Remove（“_userid“）;
????????Session[“_username“]?=?null;
????????Session.Remove（“_username“）;
????????Response.Redirect（“index.aspx“）;
????}
}