using System
using System.Collections
using System.ComponentModel
using System.Data
using System.Drawing
using System.Web
using System.Web.SessionState
using System.Web.UI
using System.Web.UI.WebControls
using System.Web.UI.HtmlControls
using System.Web.Caching
namespace WebSite5
{
public class Pages : System.Web.UI.Page
{
public int minut=5
private void Page_Load(object sender, System.EventArgs e)
{
if(Cache["UserOnlineList"]==null)
{
this.loadCaching()
}else
{
if(Session["User"]!=null)
{
Check_Session()
}
}
}
public void Check_Session()
{
String dd=Session["User"].ToString()
DataTable dt=(DataTable)Cache["UserOnlineList"]
string filter="UserIp="+Request.UserHostAddress+""
int cc=dt.Select(filter).Length
filter="UserId="+dd+""
int vv=dt.Select(filter).Length
if(vv==0)
{
DataRow dr=dt.NewRow()
dr["UserIp"]=Request.UserHostAddress
dr["UserId"]=dd
dr["UserLastVisit"]=DateTime.Now
dt.Rows.Add(dr)
}
else
{
for(int i=0i!=dt.Rows.Counti++)
{
if(dt.Rows[i]["UserId"].ToString()==dd && dt.Rows[i]["UserIp"].ToString()==Request.UserHostAddress)
{
dt.Rows[i]["UserLastVisit"]=DateTime.Now
}
}
}
}
public void loadCaching()
{
DataTable dt=new DataTable("UsersOnline")
DataColumn dcA=new DataColumn("UserIp",typeof(String))
DataColumn dcB=new DataColumn("UserId",typeof(String))
DataColumn dcC=new DataColumn("UserLastVisit",typeof(System.DateTime) )
dt.Columns.Add(dcA)
dt.Columns.Add(dcB)
dt.Columns.Add(dcC)
System.Web.Caching.CacheItemRemovedCallback CloseUser
CloseUser=new CacheItemRemovedCallback(Pages_CloseUser)
Cache.Add("UserOnlineList",dt,null,DateTime.Now.Ad
dMinutes(2) ,System.Web.Caching.Cache.NoSlidingExpiration,Cach
eItemPriority.Default,CloseUser)
}
#region Web Form Designer generated code
override protected void OnInit(EventArgs e)
{ InitializeComponent()
base.OnInit(e)
}
private void InitializeComponent()
{
this.Load += new System.EventHan_dler(this.Page_Load)
}
#endregion
private void Pages_CloseUser(string key, object Value, CacheItemRemovedReason reason)
{
if(Value.GetType() is System.Data.DataTable && key=="UserOnlineList")
{
DataTable dt=(DataTable)Value
for(int i=0i!=dt.Rows.Counti++)
{
if(((DateTime)dt.Rows[i]["UserLastVisit"]).Minute-minut < DateTime.Now.Minute-minut)
{
dt.Rows.RemoveAt(i)
}
}
System.Web.Caching.CacheItemRemovedCallback CloseUser
CloseUser=new CacheItemRemovedCallback(Pages_CloseUser)
Cache.Add("UserOnlineList",dt,null,DateTime.Now.Ad dMinutes(2)
,System.Web.Caching.Cache.NoSlidingExpiration,Cach eItemPriority.Default,CloseUser)
}
}
}
}
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