Question

以下代码在Windows窗体中运行，创建一个WebBrowser控件并导航到许多URL。每次将URL导航到应用程序消耗的内存增加时，似乎永远不会释放。在我的情况下，消耗的内存从大约10 Mb上升到大约45 Mb导航仅4个文档。我需要浏览几百个文档，这些文档会快速导致所有物理内存的使用。

如何释放WebBrowser控件使用的资源？

    private void ProcessDocs()
    {
        Random rnd = new Random();
        DateTime dtWaitUntil = DateTime.Now;
        string[] arrInputUrl = new string[] { "http://www.google.co.uk/", "http://www.google.com/", "http://www.yahoo.com/", "http://www.amazon.co.uk/" };

        for (int i = 0; i < arrInputUrl.Length; i++)
        {
            using (WebBrowser objWebBrowser = new WebBrowser())
            {
                string txtInputUrl = arrInputUrl[i];
                tboxTestingOutput.Text += "\r\n" + txtInputUrl;

                objWebBrowser.ScriptErrorsSuppressed = true;
                objWebBrowser.Navigate(txtInputUrl);

                //Should do this a better way, but, wait 10 secs for document to complete.
                //Would use objWebBrowser.DocumentCompleted event
                //but it seems to fire several times per document load!!!
                dtWaitUntil = DateTime.Now.AddSeconds(10);

                do
                {
                    Application.DoEvents();
                } while (DateTime.Now < dtWaitUntil);

                //Do whatever I need to with the document contents
                //...
                //...
            }
        }

        tboxTestingOutput.Text += "\r\nFinished";
    }

Answer 1

虽然我不会完全推荐它，但P / Invoke SetProcessWorkingSetSize为-1应该强制清空进程工作集，例如：

[DllImport("kernel32.dll")]
static extern bool SetProcessWorkingSetSize(IntPtr handle, int minSize, int maxSize);

SetProcessWorkingSetSize(Process.GetCurrentProcess().Handle,-1,-1);

在这里阅读更多内容：

http://msdn.microsoft.com/en-us/library/windows/desktop/ms686234(v=vs.85).aspx

如何使用Windows.Forms.WebBrowser控件导航Web文档时释放内存

1 个答案: