///單點登錄(Single Sign On)
public void SSOMethods(string username, string password)
{
//判斷登錄情況 此處方法省略……
int result = CheckLogin(username, password);
if(result>0)
{
//唯一標識，可自行設定
string key = string.Format("{0}_{1}",username, password);
//得到Cache中的key值
string userCache = Cache[key].ToString();
//判斷是否為空
if(string.IsNullOrEmpty(userCache))
{
TimeSpan SessionTimeOut = new TimeSpan(0,0,HttpContext.Current.Session.TimeOut,0,0);
HttpContext.Current.Cache.Insert(key,key,null,DateTime.MaxValue,SessionTimeOut,CacheItemPriority,NotRemovable,null);
Session["User"] = key;
Response.Write("<font color=red>登錄成功！</font>");
}
else
{
Repsonse.Write("<font color=red>抱歉，您已經(jīng)在其他地方登錄了！</font>");
return;
}
}
else
{
Response.Write("用戶名不存在！");
}
}