WebBrowser 在多线程中，无法释放内存

第一种：

namespace WebBrowserMemoryTest

{
    public partial class Form1 : Form
    {
        private int _Pages;


        public Form1()
        {
            InitializeComponent();
            webBrowser1.Navigate("http://www.google.com");
        }


        private void startButton_Click(object sender, EventArgs e)
        {
            _Pages = 0;
            timer1.Start();
        }


        private void stopButton_Click(object sender, EventArgs e)
        {
            timer1.Stop();
        }


        private void timer1_Tick(object sender, EventArgs e)
        {
            HtmlElement next = webBrowser1.Document.GetElementById("pnnext");


            if (_Pages <= 90)
            {
                if (null != next)
                {
                    string href = next.GetAttribute("href");
                    webBrowser1.Navigate(href);
                    _Pages++;
                }
                else
                {
                    timer1.Stop();
                    MessageBox.Show("Next button not found");
                }
            }
            else
            {
                timer1.Stop();
                MessageBox.Show("Done");
            }
        }


        private void goButton_Click(object sender, EventArgs e)
        {
            webBrowser1.Navigate(textBox1.Text);
        }


        private void freeMemButton_Click(object sender, EventArgs e)
        {
            MemoryManagement.FlushMemory();
        }
    }


    public class MemoryManagement
    {
        [DllImport("kernel32.dll")]
        public static extern bool SetProcessWorkingSetSize(IntPtr proc, int min, int max);


        public static void FlushMemory()
        {
            GC.Collect();
            GC.WaitForPendingFinalizers();
            if (Environment.OSVersion.Platform == PlatformID.Win32NT)
            {
                SetProcessWorkingSetSize(System.Diagnostics.Process.GetCurrentProcess().Handle, -1, -1);
            }
        }
    }

}

第二种：

[C#]有关WebBrowser

WebBrowser窗口自动滚动：

this.webBrowser.Document.Window.ScrollTo(0, webBrowser1.Document.Body.ScrollRectangle.Height);

 

WebBrowser的脚本出错信息：

当页面上的脚本出错时，一般情况下会弹出脚本出错提示，如果在用WB写爬虫一类的时候，这类提示可能会导致系统不能工作，解决的发是：

(1)设置属性ScriptErrorsSurpressed = true;

(2)打开IE的设置 "Internet选项" - "高级" - 勾选"禁用脚本调试"

 

WebBrowser的内存释放：

WB的内存开销很大，当连续打开很多网页时这个问题将会非常明显，甚至耗尽内存，解决的方我在MSDN论坛上找到(来源： http://social.msdn.microsoft.com/Forums/en-US/ieextensiondevelopment/thread/88c21427-e765-46e8-833d-6021ef79e0c8/)，具体如下：

 

回答者：Puremic

 

This solution worked for me!! 
Thank you so much mike_t2e!!!!!!!

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Is the memory released when you minimize the app ? If so, try this:

-- in class definition 

        [DllImport("KERNEL32.DLL", EntryPoint = "SetProcessWorkingSetSize", SetLastError = true, CallingConvention = CallingConvention.StdCall)]
        internal static extern bool SetProcessWorkingSetSize(IntPtr pProcess, int dwMinimumWorkingSetSize, int dwMaximumWorkingSetSize);

        [DllImport("KERNEL32.DLL", EntryPoint = "GetCurrentProcess", SetLastError = true, CallingConvention = CallingConvention.StdCall)]
        internal static extern IntPtr GetCurrentProcess();

-- code to call when you want to reduce the memory

            IntPtr pHandle = GetCurrentProcess();
            SetProcessWorkingSetSize(pHandle, -1, -1);