.NET網站自動瀏覽器分享，解決IIS6應用池回收後第一次訪問慢問題

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.NET開發的網站，如果不是使用先行編譯發布，網站會在iis6應用池回收後第一次訪問很慢，為瞭解決這個問題，今天寫了一個自動瀏覽的工具，現在分享給大家，介面如下。

 

 關鍵區段源碼

        //手動點擊瀏覽        private void btnBrowsing_Click(object sender, EventArgs e)        {            if (btnBrowsing.Enabled == true && chkEnableAutomaticBrowsing.Checked == true)            {                btnBrowsing.Enabled = false;                Thread thread = new Thread(new ThreadStart(AutoBrowsing));                thread.IsBackground = true;                thread.Start();            }            else            {                MessageBox.Show("任務正在執行!");            }        }        DateTime tempTime = DateTime.MinValue;//防止一分鐘內重新整理多次        private void timer1_Tick(object sender, EventArgs e)        {            DateTime dt = DateTime.Now;            //轉鐘時清除一天日誌            if (dt.ToLongTimeString() == "0:00:00")            {                rtxtLogs.Text = string.Empty;            }            TimeSpan ts = dt - tempTime;            //1分鐘內不得重新整理兩次            if (ts.TotalMinutes > 0)            {                //到點自動重新整理                if (lstTime.Items.Contains(dt.ToShortTimeString()))                {                    tempTime = dt.AddMinutes(1);                    btnBrowsing_Click(null, null);                }            }        }        private void AutoBrowsing()        {            int itemTotalCount = 0;            CrossThreadCalls.SafeInvoke(this.lvWebsitInfo, new CrossThreadCalls.TaskDelegate(delegate()            {                itemTotalCount = lvWebsitInfo.Items.Count;            }));            for (int i = 0; i < itemTotalCount; i++)            {                string url = string.Empty;                CrossThreadCalls.SafeInvoke(this.lvWebsitInfo, new CrossThreadCalls.TaskDelegate(delegate()                {                    url = lvWebsitInfo.Items[i].SubItems[2].Text;                }));                int retry = 0;            retryFlag:                CrossThreadCalls.SafeInvoke(this.webBrowser1, new CrossThreadCalls.TaskDelegate(delegate()                {                    webBrowser1.Navigate(url);                }));                if (WaitWebPageLoad())                {                    CrossThreadCalls.SafeInvoke(this.rtxtLogs, new CrossThreadCalls.TaskDelegate(delegate()                    {                        rtxtLogs.AppendText(url + "瀏覽成功，瀏覽時間：" + DateTime.Now.ToLongTimeString() + "\r\n\r\n");                        rtxtLogs.ScrollToCaret();                    }));                    CrossThreadCalls.SafeInvoke(this.lvWebsitInfo, new CrossThreadCalls.TaskDelegate(delegate()                    {                        lvWebsitInfo.Items[i].SubItems[3].Text = DateTime.Now.ToString();                    }));                }                else                {                    CrossThreadCalls.SafeInvoke(this.rtxtLogs, new CrossThreadCalls.TaskDelegate(delegate()                    {                        rtxtLogs.AppendText(url + "瀏覽失敗，即將重試" + (retry + 1) + "次\r\n");                        rtxtLogs.ScrollToCaret();                    }));                    if (retry < 2)//重試3次                    {                        retry++;                        Thread.Sleep(3000);                        goto retryFlag;                    }                    CrossThreadCalls.SafeInvoke(this.rtxtLogs, new CrossThreadCalls.TaskDelegate(delegate()                    {                        rtxtLogs.AppendText(url + "瀏覽失敗\r\n\r\n");                        rtxtLogs.ScrollToCaret();                    }));                    CrossThreadCalls.SafeInvoke(this.lvWebsitInfo, new CrossThreadCalls.TaskDelegate(delegate()                    {                        lvWebsitInfo.Items[i].SubItems[3].Text = "自動瀏覽失敗";                    }));                }            }            CrossThreadCalls.SafeInvoke(this.btnBrowsing, new CrossThreadCalls.TaskDelegate(delegate()            {                btnBrowsing.Enabled = true;            }));            CrossThreadCalls.SafeInvoke(this.webBrowser1, new CrossThreadCalls.TaskDelegate(delegate()            {                webBrowser1.Navigate("about:blank");            }));        }        /// <summary>        /// 判斷webbrowser是否載入一個網頁完畢，可判斷包括iframe的網頁        /// </summary>        /// <returns></returns>        private bool WaitWebPageLoad()        {            int i = 0;            string sUrl = string.Empty;            while (true)            {                Delay(50);  //系統延遲50毫秒，夠少了吧！                WebBrowserReadyState webBrowserState = WebBrowserReadyState.Uninitialized;                CrossThreadCalls.SafeInvoke(this.webBrowser1, new CrossThreadCalls.TaskDelegate(delegate()                {                    webBrowserState = webBrowser1.ReadyState;                }));                if (webBrowserState == WebBrowserReadyState.Complete) //先判斷是否發生完成事件。                {                    bool isBusy = true;                    CrossThreadCalls.SafeInvoke(this.webBrowser1, new CrossThreadCalls.TaskDelegate(delegate()                    {                        isBusy = webBrowser1.IsBusy;                    }));                    if (!isBusy) //再判斷是瀏覽器是否繁忙                    {                        i = i + 1;                        if (i == 2)                        {                            CrossThreadCalls.SafeInvoke(this.webBrowser1, new CrossThreadCalls.TaskDelegate(delegate()                            {                                sUrl = webBrowser1.Url.ToString();                            }));                            if (sUrl.Contains("res") || sUrl.Contains("daohang.114so.cn")) //這是判斷沒有網路的情況下                            {                                return false;                            }                            else                            {                                return true;                            }                        }                        continue;                    }                    i = 0;                }            }        }        private void Delay(int Millisecond) //延遲系統時間，但系統又能同時能執行其它任務；        {            DateTime current = DateTime.Now;            while (current.AddMilliseconds(Millisecond) > DateTime.Now)            {                Application.DoEvents();//轉讓控制權                        }            return;        }

 

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