************************************在Global.asax中如下************************
<%@ Import Namespace="System.Data.SqlClient" %>
起始:
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//SqlConnection con = new SqlConnection();
//con.ConnectionString = ConfigurationManager.ConnectionStrings["TongJiConnectionString"].ConnectionString;
SqlConnection con=new SqlConnection("server=.;database=countPeople;uid=sa;pwd=;");
con.Open();
SqlCommand cmd=new SqlCommand("select * from countPeople",con);
int count=Convert.ToInt32(cmd.ExecuteScalar());
con.Close();
Application["total"]=count;//Application是个全局变量,每个会话都可对他操作
Application["online"]=0;
}
protected void Session_Start(Object sender, EventArgs e)//客户端一连接到服务器上,这个事件就会发生
{
Session.Timeout=1;
Application.Lock();//锁定后,只有这个Session能够会话
Application["total"]=(int)Application["total"]+1;
Application["online"]=(int)Application["online"]+1;
Application.UnLock();//会话完毕后解锁
}
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//SqlConnection con = new SqlConnection();
//con.ConnectionString = ConfigurationManager.ConnectionStrings["TongJiConnectionString"].ConnectionString;
SqlConnection con=new SqlConnection("server=.;database=countPeople;uid=sa;pwd=;");
con.Open();
SqlCommand cmd=new SqlCommand("update countPeople set num="+Application["total"],con);
cmd.ExecuteNonQuery();
con.Close();
}
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