多线程webBrowser的AccessViolationException异常

Question

采用多个线程分别控制一个webBrowser，同时加载不同网页，然后读取其中的Document。可是会不定期地抛AccessViolationException异常. 抛出异常后，如果在Debug中，直接F5执行下面语句不会对程序结果又任何影响，但是还是会不定期的再次抛出这个异常

        void webBrowser_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
        {
            //throw new NotImplementedException();
            if(((WebBrowser)sender).ReadyState<WebBrowserReadyState.Complete)

             return;
             System.Windows.Forms.HtmlDocument document = webBrowser.Document;                     //就是在这句访问webBrowser的时候抛出异常，
             shopInfoQueue.Enqueue(shopInfo);
             htmlContentQueue.Enqueue(document.Body.InnerHtml);

         }

不明白为什么会不定期出错，并且继续执行并不影响结果，最主要的，这个怎么解决，或者能否屏蔽该异常

Answer 1

根据MSDN，你是否在你的Main方法中，使用了STAThreadAttribute属性？

Answer 2

根据MSDN，你是否在你的Main方法中，使用了STAThreadAttribute属性？

主线程没有，不过主线程创建的那几个控制webBrowser的线程都使用了  t.serApartmentState(ApartmentState.STA);

Answer 3

WebBrowser控件本身是STA组件，所以，创建WebBrowser的线程需要是STA。通常，UI组件是在UI线程中初始化，所以，建议把Main方法设为STA再试试。如果还不行，再想别的方法。

Answer 4

WebBrowser控件本身是STA组件，所以，创建WebBrowser的线程需要是STA。通常，UI组件是在UI线程中初始化，所以，建议把Main方法设为STA再试试。如果还不行，再想别的方法。

设置主线程的ApartmentState, Thread.CurrentThread.SetApartmentState(ApartmentState.STA)，会抛出InvalidOperationException异常，Failed to set the specified COM apartment state....

是设置的方法不对？还是？？

Answer 5

需要在Main方法上设STAThreadAttribute属性，因为COM套间的类型是不能够改变的。

大概是如下的方式，你试试

[STAThread]
void Main()

Answer 6

需要在Main方法上设STAThreadAttribute属性，因为COM套间的类型是不能够改变的。

大概是如下的方式，你试试

[STAThread]
void Main()

好的，多谢，我试下

Answer 7

需要在Main方法上设STAThreadAttribute属性，因为COM套间的类型是不能够改变的。

大概是如下的方式，你试试

[STAThread]
void Main()

还是不行，运行一段时间之后还是同样的错误

Answer 8

应该是多线程调用WebBrowser出错了，能多贴一些你的代码，或者传个能重现问题的小Project么？

Answer 9

应该是多线程调用WebBrowser出错了，能多贴一些你的代码，或者传个能重现问题的小Project么？

 public void Init()                                        //每个线程有自己的form和WebBrowser                                                                                          
        {
            lock (lockMemory)
            {
                this.form = new Form();
                this.webBrowser = new WebBrowser();
                this.form.Controls.Add(webBrowser);
            }
            form.WindowState = FormWindowState.Minimized;
            form.Visible = false;
            form.ShowInTaskbar = false;
            this.webBrowser.ScriptErrorsSuppressed = true;
            this.webBrowser.DocumentCompleted += new WebBrowserDocumentCompletedEventHandler(webBrowser_DocumentCompleted);

            Begin();
        }

 

public void Begin()
        {

            lock (lockProgram)
            {
                cnt = Program.shopListOffset++;                                                                     
                if (cnt >= Program.totalCount)
                {
                    Console.WriteLine("Finish!");
                    System.Threading.Thread.CurrentThread.Abort();
                }
                shopInfo = Program.shopInfoQueue.Dequeue();                                 //从队列中取URL
            }

            this.webBrowser.Navigate(getUrl(shopInfo));
            if(form.Visible==false)
                form.ShowDialog();
        }

       void webBrowser_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
        {
            if (((WebBrowser)sender).ReadyState < WebBrowserReadyState.Complete)
                return;
         waitSomeTime();
        }

  public void waitSomeTime()                                        //需要在页面加载完成后等待2秒才能取到要取的内容
        {
            
            timer = new System.Windows.Forms.Timer();
          
            timer.Interval = 2000; //2秒啓動
            timer.Tick += new EventHandler(Timer_Tick);
            timer.Start();
        }
        private void Timer_Tick(object sender, EventArgs e)
        {
            lock (lockHtmlContentQueue)
            {
                System.Windows.Forms.HtmlDocument document= this.webBrowser.Document;        //这句出错
                shopInfoQueue.Enqueue(shopInfo);
                htmlContentQueue.Enqueue(document.Body.InnerHtml);

            }

                 Begin();

      }

这些就是一个线程要做的事情，大概就是从队列里取出URL，打开网页，等两秒钟然后取出网页的Document，最后把document.Body.InnerHtml存到另一个队列，然后再重新开始这么一个过程。

多谢指点了

Answer 10

WebBrowser需要创建在UI线程中，且该线程中需要有消息循环。你能把Init()的调用的代码贴出来么？每个线程怎么创建，是否有消息循环，都很重要。

Answer 11

WebBrowser需要创建在UI线程中，且该线程中需要有消息循环。你能把Init()的调用的代码贴出来么？每个线程怎么创建，是否有消息循环，都很重要。

           

  static void Main(string[] args)
        {
            int maxThreadCount = Int32.Parse(Console.ReadLine());

            System.Threading.Thread[] t = new Thread[maxThreadCount];
            GoogleMap[] gmc = new GoogleMap[maxThreadCount];

            for (i = 0; i < maxThreadCount; i++)
            {
                gm[i] = new GoogleMap();
                t[i] = new Thread(gm[i].Init);
                t[i].SetApartmentState(System.Threading.ApartmentState.STA);
                t[i].Start();
            }

}

Answer 12

你的线程中没有消息循环，线程似乎应该很快就退了，建议在Init()最后，加上一句：

Application.Run(this.form);

Answer 13

你的线程中没有消息循环，线程似乎应该很快就退了，建议在Init()最后，加上一句：

Application.Run(this.form);

因为是几个线程共用一个form，所以用form.showdialog(),可以跟这个application起到一样的效果

最开始的时候是每个线程有自己的form，但是同样会抛出AccessViolationException异常

Time_tick方法最后重新调用了Begin(),所以会一直循环下去直到最后

Answer 14

我大概试了一下，总是在document.body.InnerHTML这句出的错。document是好的，document.body是空。

不知道怎么回事，所以把我的代码帖上来，你看看，能不能修改修改重现你的问题。maxThreadCount = 15.

googlemap.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows.Forms;


namespace ForumMultiThreadWebBrowser
{
    class GoogleMap
    {
        public GoogleMap()
        {
            this.lockHtmlContentQueue = new Object();
            this.lockMemory = new Object();
            this.lockProgram = new Object();

            this.htmlContentQueue = new Queue<string>();
        }

        public void Init()                                        //每个线程有自己的form和WebBrowser                                                                                          
        {
            lock (lockMemory)
            {
                this.form = new Form();
                this.webBrowser = new WebBrowser();
                this.form.Controls.Add(webBrowser);
            }
            form.WindowState = FormWindowState.Minimized;
            form.Visible = false;
            form.ShowInTaskbar = false;
            this.webBrowser.ScriptErrorsSuppressed = true;
            this.webBrowser.DocumentCompleted += new WebBrowserDocumentCompletedEventHandler(webBrowser_DocumentCompleted);

            Begin();
        }

        public void Begin()
        {

            lock (lockProgram)
            {
                int cnt = Program.shopListOffset++;
                if (cnt >= Program.totalCount)
                {
                    Console.WriteLine("Finish!");
                    System.Threading.Thread.CurrentThread.Abort();
                }
                shopInfo = Program.shopInfoQueue.Dequeue();                                 //从队列中取URL
            }

            this.webBrowser.Navigate(getUrl(shopInfo));
            if (form.Visible == false)
                form.ShowDialog();
        }

        void webBrowser_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
        {
            if (((WebBrowser)sender).ReadyState < WebBrowserReadyState.Complete)
                return;
            waitSomeTime();
        }

        public void waitSomeTime()                                        //需要在页面加载完成后等待2秒才能取到要取的内容
        {

            timer = new System.Windows.Forms.Timer();

            timer.Interval = 2000; //2秒啓動
            timer.Tick += new EventHandler(Timer_Tick);
            timer.Start();
        }
        private void Timer_Tick(object sender, EventArgs e)
        {
            lock (lockHtmlContentQueue)
            {
                System.Windows.Forms.HtmlDocument document = this.webBrowser.Document;        //这句出错
                Program.shopInfoQueue.Enqueue(shopInfo);
                this.htmlContentQueue.Enqueue(document.Body.InnerHtml);

            }

            Begin();
        }

        private string getUrl(ShopInfo shopinfo)
        {
            return shopinfo.URL;
        }

        #region Fields

        private object lockMemory;
        private object lockProgram;
        private object lockHtmlContentQueue;

        private WebBrowser webBrowser;
        private Form form;
        private Timer timer;
        private ShopInfo shopInfo;
        private Queue<string> htmlContentQueue;

        #endregion

    }
}

ShopInfo.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ForumMultiThreadWebBrowser
{
    class ShopInfo
    {
        public ShopInfo(string url)
        {
            this.Url = url;
        }

        public string URL { get { return this.Url; } }

        private string Url;
    }
}

Program.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;

namespace ForumMultiThreadWebBrowser
{
    class Program
    {
        static void Main(string[] args)
        {
            Program.shopListOffset = 0;
            Program.shopInfoQueue = new Queue<ShopInfo>();
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://bing.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://google.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://microsoft.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://cnn.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://facebook.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://bing.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://google.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://microsoft.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://cnn.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://facebook.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://bing.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://google.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://microsoft.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://cnn.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://facebook.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://bing.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://google.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://microsoft.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://cnn.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://facebook.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://bing.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://google.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://microsoft.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://cnn.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://facebook.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://bing.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://google.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://microsoft.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://cnn.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://facebook.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://bing.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://google.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://microsoft.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://cnn.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://facebook.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://bing.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://google.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://microsoft.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://cnn.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://facebook.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://bing.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://google.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://microsoft.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://cnn.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://facebook.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://bing.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://google.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://microsoft.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://cnn.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://facebook.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://bing.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://google.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://microsoft.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://cnn.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://facebook.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://bing.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://google.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://microsoft.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://cnn.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://facebook.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://bing.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://google.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://microsoft.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://cnn.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://facebook.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://bing.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://google.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://microsoft.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://cnn.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://facebook.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://bing.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://google.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://microsoft.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://cnn.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://facebook.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://bing.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://google.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://microsoft.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://cnn.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://facebook.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://bing.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://google.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://microsoft.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://cnn.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://facebook.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://bing.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://google.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://microsoft.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://cnn.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://facebook.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://bing.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://google.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://microsoft.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://cnn.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://facebook.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://bing.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://google.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://microsoft.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://cnn.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://facebook.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://bing.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://google.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://microsoft.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://cnn.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://facebook.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://bing.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://google.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://microsoft.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://cnn.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://facebook.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://bing.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://google.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://microsoft.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://cnn.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://facebook.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://bing.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://google.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://microsoft.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://cnn.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://facebook.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://bing.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://google.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://microsoft.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://cnn.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://facebook.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://bing.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://google.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://microsoft.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://cnn.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://facebook.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://bing.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://google.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://microsoft.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://cnn.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://facebook.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://bing.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://google.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://microsoft.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://cnn.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://facebook.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://bing.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://google.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://microsoft.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://cnn.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://facebook.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://bing.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://google.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://microsoft.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://cnn.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://facebook.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://bing.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://google.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://microsoft.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://cnn.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://facebook.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://bing.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://google.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://microsoft.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://cnn.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://facebook.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://bing.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://google.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://microsoft.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://cnn.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://facebook.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://bing.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://google.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://microsoft.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://cnn.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://facebook.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://bing.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://google.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://microsoft.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://cnn.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://facebook.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://bing.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://google.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://microsoft.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://cnn.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://facebook.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://bing.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://google.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://microsoft.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://cnn.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://facebook.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://bing.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://google.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://microsoft.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://cnn.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://facebook.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://bing.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://google.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://microsoft.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://cnn.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://facebook.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://bing.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://google.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://microsoft.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://cnn.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://facebook.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://bing.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://google.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://microsoft.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://cnn.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://facebook.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://bing.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://google.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://microsoft.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://cnn.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://facebook.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://bing.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://google.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://microsoft.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://cnn.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://facebook.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://bing.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://google.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://microsoft.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://cnn.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://facebook.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://bing.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://google.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://microsoft.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://cnn.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://facebook.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://bing.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://google.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://microsoft.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://cnn.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://facebook.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://bing.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://google.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://microsoft.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://cnn.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://facebook.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://bing.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://google.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://microsoft.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://cnn.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://facebook.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://bing.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://google.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://microsoft.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://cnn.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://facebook.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://bing.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://google.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://microsoft.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://cnn.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://facebook.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://bing.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://google.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://microsoft.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://cnn.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://facebook.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://bing.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://google.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://microsoft.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://cnn.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://facebook.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://bing.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://google.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://microsoft.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://cnn.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://facebook.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://bing.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://google.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://microsoft.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://cnn.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://facebook.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://bing.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://google.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://microsoft.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://cnn.com"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://facebook.com"));
            Program.totalCount = Program.shopInfoQueue.Count;


            int maxThreadCount = Int32.Parse(Console.ReadLine());

            System.Threading.Thread[] t = new Thread[maxThreadCount];
            GoogleMap[] gm = new GoogleMap[maxThreadCount];


            for (int i = 0; i < maxThreadCount; i++)
            {
                gm[i] = new GoogleMap();
                t[i] = new Thread(gm[i].Init);
                t[i].SetApartmentState(System.Threading.ApartmentState.STA);
                t[i].Start();
            }

        }

        public static int shopListOffset;
        public static int totalCount;
        public static Queue<ShopInfo> shopInfoQueue;
    }
}

Answer 15

            Program.shopInfoQueue.Enqueue(new ShopInfo("http://www.dianping.com/shop/5438066"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://www.dianping.com/shop/4227576"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://www.dianping.com/shop/1989367"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://www.dianping.com/shop/5646380"));
            Program.shopInfoQueue.Enqueue(new ShopInfo("http://www.dianping.com/shop/1990279"));

你把url换成这些，然后数据量大一些，大概到5000条左右吧，应该就会出我说的那个错误了

多谢指点了，嘿嘿

Answer 16

高手？找到问题所在了吗？

Answer 17

我不能重现你的问题，我总是遇到document.body为空的情况。也许和你遇到的问题是类同的，只是表现不一样。我打算调试一下我的问题，然后贴上来供你参考。