c# 统计在线会员人数
using System;
using System.Data;
using System.Configuration;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using System.Text;
/// <summary>
///onlineCount 的摘要说明
/// </summary>
public class onlineCount
{
private string USERNAME;
private int OFFLINEDIFF;
private int REMOVEDIFF;
public onlineCount()
{
//直接在这里设定、或从配置文件中读取配置参数
///存放用户名的Session名
USERNAME = HttpContext.Current.Session["username"].ToString();
///多少分钟不活动的用户从在线列表中删除
///u
OFFLINEDIFF = 5;
///多少秒执行一次删除不活动用户
REMOVEDIFF = 10;
if (System.Web.HttpContext.Current.Application["OnlineTalbe"] == null)
{
this.CashTableInit();
}
}
public void CheckOnline()
{
//从Application获取数据表、获取SessionID
DataTable dtOnline;
dtOnline = (DataTable)System.Web.HttpContext.Current.Application["OnlineTalbe"];
string sessionId = System.Web.HttpContext.Current.Session.SessionID.ToString();
//System.Web.HttpContext.Current.Response.Write(sessionId);
//数据表中是否有我的记录
DataRow drFind = dtOnline.Rows.Find(sessionId);
if (drFind != null)
{
//有；更新我的状态
drFind["LastActiveTime"] = DateTime.Now;
drFind["UserWhere"] = this.AtWhere;
//用户由访客状态变为了登陆会员、或反之
drFind["VisitorName"] = USERNAME;
drFind["VisitorLevel"] = 1;
}
else
{
//无；加入关于我的在线信息
DataRow drNew = dtOnline.NewRow();
drNew["SessionID"] = sessionId;
drNew["VisitorName"] = USERNAME;
drNew["VisitorLevel"] = 1;
drNew["LastActiveTime"] = DateTime.Now;
drNew["LoginTime"] = DateTime.Now;
drNew["VisitorIP"] = System.Web.HttpContext.Current.Request.UserHostAddress;
drNew["UserWhere"] = this.AtWhere;
dtOnline.Rows.Add(drNew);
}
//如果没有人正在执行删除且离上次删除的时间间隔超过设定值
TimeSpan tsRemove = DateTime.Now - Convert.ToDateTime(GetApplication("LastRemove"));
if (tsRemove.Seconds > REMOVEDIFF && this.GetApplication("Removing").ToString() == "n")
{
//锁定，我正在删除过期用户
System.Web.HttpContext.Current.Application.Lock();
SetApplication("Removing", "y");
System.Web.HttpContext.Current.Application.UnLock();
//不知道Rows.Count是否随循环减少，如果是效率就大于foreach且这里不能使用foreach
for (int i = 0; i < dtOnline.Rows.Count; i++)
{
DataRow drDel = dtOnline.Rows[i];
TimeSpan ts = DateTime.Now - Convert.ToDateTime(drDel["LastActiveTime"]);
if (ts.Minutes > OFFLINEDIFF)
{
dtOnline.Rows.Remove(drDel);
System.Web.HttpContext.Current.Response.Write("好累");
}
}
System.Web.HttpContext.Current.Application.Lock();
SetApplication("Removing", "n");
SetApplication("LastRemove", DateTime.Now.ToString());
System.Web.HttpContext.Current.Application.UnLock();
}
//把被我揉腻完了的数据表放回Application
dtOnline.AcceptChanges();
System.Web.HttpContext.Current.Application.Lock();
System.Web.HttpContext.Current.Application["DataTalbeOnline"] = dtOnline;
System.Web.HttpContext.Current.Application.UnLock();
}
//根据apcname得到对应的值
private string GetApplication(string apcname)
{
return System.Web.HttpContext.Current.Application[apcname].ToString();
}
//给Application赋值
public void SetApplication(string apcname, string apcvalue)
{
System.Web.HttpContext.Current.Application[apcname] = apcvalue;
}
/// <summary>
/// 返回用户当前位置
/// </summary>
private string AtWhere
{
get
{
System.Text.StringBuilder sb = new System.Text.StringBuilder();
sb.Append(System.Web.HttpContext.Current.Request.ServerVariables["url"]);
if (System.Web.HttpContext.Current.Request.ServerVariables["QUERY_STRING"] != String.Empty)
{
sb.Append("?");
sb.Append(System.Web.HttpContext.Current.Request.ServerVariables["QUERY_STRING"]);
}
return sb.ToString();
}
}
/// <summary>
/// 创建表
/// </summary>
public void CashTableInit()
{
DataTable dt = new DataTable("OnlineTalbe"); //创建临时表
dt.Columns.Add("SessionID", typeof(string));
dt.Columns.Add("VisitorName", typeof(string));
dt.Columns.Add("VisitorLevel", typeof(int));
dt.Columns.Add("LastActiveTime", typeof(DateTime));
dt.Columns.Add("LoginTime", typeof(DateTime));
dt.Columns.Add("VisitorIP", typeof(string));
dt.Columns.Add("UserWhere", typeof(string));
dt.Columns["SessionID"].Unique = true;
dt.PrimaryKey = new DataColumn[] { dt.Columns["SessionID"] };
System.Web.HttpContext.Current.Application["OnlineTalbe"] = dt;
System.Web.HttpContext.Current.Application["LastRemove"] = DateTime.Now.ToString();
System.Web.HttpContext.Current.Application["Removing"] = "n";
}
}
在要统计的每个用户页面上加
protected void Page_Load(object sender, EventArgs e)
{
//测试在线统计
onlineCount oc = new onlineCount();
oc.CheckOnline();
}
在要显示统计人数的页面上加
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
if (Application["OnlineTalbe"] != null)
{
bindData();
}
}
}
void bindData()
{
if (Application["OnlineTalbe"] != null)
{
DataTable dt = (DataTable)Application["OnlineTalbe"];
DataList1.DataSource = dt;
DataList1.DataBind();
int totalrecord = dt.Rows.Count;
AspNetPager1.RecordCount = totalrecord;
dt.Dispose();
}
}
protected void AspNetPager1_PageChanged(object sender, EventArgs e)
{
bindData();
}
