如何统计网站访问量，代码实现使用全局变量 Application,start,end,Session_start,Session_end事件

void Application_Start(object sender, EventArgs e)

{

// 在应用程序启动时运行的代码

long totalCount = 0; //总访问数

int todayCount = 0;//今天在线人数

//先从XML中取得访问数

string xmlFilePath = Server.MapPath("~/") + "App_Data//xmls//count.xml"; //XML文件路径

DataSet ds = newDataSet();

ds.ReadXml(xmlFilePath);

totalCount = Int64.Parse(ds.Tables[0].Rows[0]["TotalCount"].ToString().Trim());

//设置Application，设置在线数量，总访问数量

Application["total_count"] = totalCount;

Application["today_count"] = todayCount;

}

void Session_Start(object sender, EventArgs e)

{

// 在新会话启动时运行的代码

Application.Lock();//锁定

long totalCount = 0; //总访问数

int todayCount = 0;//今天访问数

totalCount = Convert.ToInt64(Application["total_count"]);

todayCount = Convert.ToInt32(Application["today_count"]);

totalCount++;//用户登录，以后才修改访问总数

todayCount++;//在线用户数量加 1

Application["total_count"] = totalCount;

Application["today_count"] = todayCount;

//把访问数写如到XML文件中

string xmlFilePath = Server.MapPath("~/") + "App_Data/xmls/count.xml"; //XML文件路径

XmlDocument xmlObj = newXmlDocument();

xmlObj.Load(xmlFilePath);

XmlNode xmlRootOjb = xmlObj.SelectSingleNode("Web/AccessInfo/TotalCount");

xmlRootOjb.InnerText = totalCount.ToString();//增加总的访问量，并修改xml总访问量的值

xmlObj.Save(xmlFilePath);

Application.UnLock();//解锁

}

void Session_End(object sender, EventArgs e)

{   //这里主要计算登录用户

Application.Lock();

Application["today_count"] = Int32.Parse(Application["today_count"].ToString()) - 1;

//当用户离开站点的时候,在线总数减1

Application.UnLock();

}