Session["id"] = user.id.ToString();
Session["name"] = user.name.ToString();
Session["pwd"] = user.password.ToString();
Session["time"] = user.LoginTime.ToString();
Session["authority"] = user.limits.ToString();

protected void Page_Load(object sender, EventArgs e)
{
if (Session["id"] == null || Session["name"] == null || Session["time"] == null || Session["authority"] == null || Session["pwd"] == null)
Response.Redirect("~/Login.aspx", true);
if (!IsPostBack)
{
。。。。。。
}
}

public void Clear(object sender, EventArgs e)
{
Session["id"] = null;
Session["name"] = null;
ClearClientPageCache();
Response.Redirect("~/Login.aspx");
}
public void ClearClientPageCache()
{
//清除瀏覽器緩存
　　Response.Buffer = true;
Response.ExpiresAbsolute = DateTime.Now.AddDays(-1);
Response.Cache.SetExpires(DateTime.Now.AddDays(-1));
Response.Expires = 0;
Response.CacheControl = "no-cache";
Response.Cache.SetNoStore();
}

<a class="atop" target="_self" <SPAN style="BACKGROUND-COLOR: #ff0000">runat="server" onserverclick</SPAN> ="Clear" >退出系統(tǒng)</a>

<a href="~/Login.aspx" class="atop" target="_self" onclick=“clear()”>賬戶(hù)信息</a>
<script>
　　function clear()<BR>　　{<BR>　　　　<%Clear();%><BR>　　}
</script>

public void Clear()
{
Session["id"] = null;
Session["name"] = null;
}