IIS asp mvc4.0网站 架设后，第一次访问速度非常慢，必须每个页面都点一下才快。

.NET系统在首次运行时速度会慢一点，但并不是每个页面都这样。

可能你的系统还有其它问题，比如，代码里有远程访问，或数据库原因导致打开速度慢。

需要针对性检查。

关键部分源码

//手动点击浏览

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("任务正在执行!")

}

}

DateTime tempTime = DateTime.MinValue//防止一分钟内刷新多次

private void timer1_Tick(object sender, EventArgs e)

{

DateTime dt = DateTime.Now

//转钟时清除一天日志

if (dt.ToLongTimeString() == "0:00:00")

{

rtxtLogs.Text = string.Empty

}

TimeSpan ts = dt - tempTime

//1分钟内不得刷新两次

if (ts.TotalMinutes >0)

{

//到点自动刷新

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 = 0i <itemTotalCounti++)

{

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 + "浏览成功，浏览时间：" + 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 + "浏览失败，即将重试" + (retry + 1) + "次\r\n")

rtxtLogs.ScrollToCaret()

}))

if (retry <2)//重试3次

{

retry++

Thread.Sleep(3000)

goto retryFlag

}

CrossThreadCalls.SafeInvoke(this.rtxtLogs, new CrossThreadCalls.TaskDelegate(delegate()

{

rtxtLogs.AppendText(url + "浏览失败\r\n\r\n")

rtxtLogs.ScrollToCaret()

}))

CrossThreadCalls.SafeInvoke(this.lvWebsitInfo, new CrossThreadCalls.TaskDelegate(delegate()

{

lvWebsitInfo.Items[i].SubItems[3].Text = "自动浏览失败"

}))

}

}

CrossThreadCalls.SafeInvoke(this.btnBrowsing, new CrossThreadCalls.TaskDelegate(delegate()

{

btnBrowsing.Enabled = true

}))

CrossThreadCalls.SafeInvoke(this.webBrowser1, new CrossThreadCalls.TaskDelegate(delegate()

{

webBrowser1.Navigate("about:blank")

}))

}

/// <summary>

/// 判断webbrowser是否加载一个网页完毕，可判断包括iframe的网页

/// </summary>

/// <returns></returns>

private bool WaitWebPageLoad()

{

int i = 0

string sUrl = string.Empty

while (true)

{

Thread.Sleep(2000)

WebBrowserReadyState webBrowserState = WebBrowserReadyState.Uninitialized

CrossThreadCalls.SafeInvoke(this.webBrowser1, new CrossThreadCalls.TaskDelegate(delegate()

{

webBrowserState = webBrowser1.ReadyState

}))

if (webBrowserState == WebBrowserReadyState.Complete) //先判断是否发生完成事件。

{

bool isBusy = true

CrossThreadCalls.SafeInvoke(this.webBrowser1, new CrossThreadCalls.TaskDelegate(delegate()

{

isBusy = webBrowser1.IsBusy

}))

if (!isBusy) //再判断是浏览器是否繁忙

{

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")) //这是判断没有网络的情况下

{

return false

}

else

{

return true

}

}

continue

}

i = 0

}

}

}

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