总的来说,要做个在线人数统计简单,但是要做在线名单并且保存用户的访问日志,就需要耗费比较多的系统资源,是否划算就难说了(我只看需求文档,其他不管...);前面用过的IHttpModule方法也不错,原先每用过,也学了一招... 感谢思归老大的帮忙,分就散了吧~using System; using System.ComponentModel; using System.Web; using System.Web.SessionState; using System.Data; using System.Data.OleDb;namespace XsExam { /// <summary> /// Global 的摘要说明。 /// </summary> public class Global : System.Web.HttpApplication { private static System.Threading.Timer timer; private const int interval = 1000 * 60 * 10;//检查在线用户的间隔时间
using System.ComponentModel;
using System.Web;
using System.Web.SessionState;
using System.Data;
using System.Data.OleDb;namespace XsExam
{
/// <summary>
/// Global 的摘要说明。
/// </summary>
public class Global : System.Web.HttpApplication
{
private static System.Threading.Timer timer;
private const int interval = 1000 * 60 * 10;//检查在线用户的间隔时间
/// <summary>
/// 必需的设计器变量。
/// </summary>
private System.ComponentModel.IContainer components = null;public Global()
{
InitializeComponent();
}protected void Application_Start(Object sender, EventArgs e)
{
if (timer == null)
timer = new System.Threading.Timer(new System.Threading.TimerCallback(ScheduledWorkCallback),
sender, 0, interval); DataTable userTable = new DataTable();
userTable.Columns.Add("UserID");//用户ID
userTable.Columns.Add("UserName");//用户姓名
userTable.Columns.Add("FirstRequestTime");//第一次请求的时间
userTable.Columns.Add("LastRequestTime");//最后一次请求的时间
userTable.Columns.Add("ClientIP");//
userTable.Columns.Add("ClientName");//
userTable.Columns.Add("ClientAgent");//
//userTable.Columns.Add("LastRequestPath");//最后访问的页面 userTable.PrimaryKey = new DataColumn[]{userTable.Columns[0]};
userTable.AcceptChanges(); Application.Lock();
Application["UserOnLine"] = userTable;
Application.UnLock();
}
protected void Session_Start(Object sender, EventArgs e)
{ } protected void Application_BeginRequest(Object sender, EventArgs e)
{
}protected void Application_EndRequest(Object sender, EventArgs e)
{} protected void Application_AcquireRequestState(Object sender, EventArgs e)
{
HttpApplication mApp = (HttpApplication)sender;
if(mApp.Context.Session == null) return;
if(mApp.Context.Session["UserID"]==null ) return;
string userID = mApp.Context.Session["UserID"].ToString();
DataTable userTable = (DataTable)Application["UserOnLine"];
DataRow curRow = userTable.Rows.Find(new object[]{userID});
if(curRow != null)
{
this.GetDataRowFromHttpApp(mApp,ref curRow);
}
else
{
DataRow newRow = userTable.NewRow();
this.GetDataRowFromHttpApp(mApp,ref newRow);
userTable.Rows.Add(newRow);
}
userTable.AcceptChanges(); Application.Lock();
Application["UserOnLine"] = userTable;
Application.UnLock(); }protected void Application_AuthenticateRequest(Object sender, EventArgs e)
{
}protected void Application_Error(Object sender, EventArgs e)
{
}
protected void Session_End(Object sender, EventArgs e)
{
}protected void Application_End(Object sender, EventArgs e)
{
}#region Web 窗体设计器生成的代码
/// <summary>
/// 设计器支持所需的方法 - 不要使用代码编辑器修改
/// 此方法的内容。
/// </summary>
private void InitializeComponent()
{
this.components = new System.ComponentModel.Container();
}
#endregion private void GetDataRowFromHttpApp(HttpApplication mApp,ref DataRow mRow)
{
if(mApp.Context.Session == null) return;
if(mApp.Context.Session["UserID"]==null || mApp.Context.Session["UserName"]==null) return;
string userID = mApp.Context.Session["UserID"].ToString();
string userName = mApp.Context.Session["UserName"].ToString();
//string requestPath = mApp.Request.Path;
if(mRow["UserID"].ToString().Length<1)
{
mRow["UserID"] = userID;
mRow["UserName"] = userName;
mRow["FirstRequestTime"] = System.DateTime.Now;
mRow["ClientIP"] = mApp.Context.Request.UserHostAddress;
mRow["ClientName"] = mApp.Context.Request.UserHostName;
mRow["ClientAgent"] = mApp.Context.Request.UserAgent;
} mRow["LastRequestTime"] = System.DateTime.Now;
//mRow["LastRequestPath"] = requestPath;
} private void ScheduledWorkCallback (object sender)
{
string filter = "Convert(LastRequestTime,'System.DateTime') < Convert('" + System.DateTime.Now.AddSeconds(-interval/1000).ToString() + "','System.DateTime')";
DataTable userTable = (DataTable)Application["UserOnLine"];
DataRow[] lineOutUsers = userTable.Select(filter);
for(int i=0;i<lineOutUsers.Length;i++)
{
DataRow curRow = lineOutUsers[i];
//保存到数据库
XsStudio.Database db = new XsStudio.Database();
curRow.Delete();
}
userTable.AcceptChanges(); Application.Lock();
Application["UserOnLine"] = userTable;
Application.UnLock();
}
}
}
至于取得的方式,可以通过另一个网页取得。msxml.xmlhttp