在aspx网站中使用webBrowser控件

时间:2014-08-11 08:39:12

标签: c# asp.net browser

我使用以下代码在aspx网站中将webBrowser控件用作类 -

public CustomBrowser()
{
    //
    // TODO: Add constructor logic here
    //
}

protected string _url;
string html = "";
public string GetWebpage(string url)
{
    _url = url;
    // WebBrowser is an ActiveX control that must be run in a
    // single-threaded apartment so create a thread to create the
    // control and generate the thumbnail
    Thread thread = new Thread(new ThreadStart(GetWebPageWorker));
    thread.SetApartmentState(ApartmentState.STA);
    thread.Start();
    thread.Join();
    string s = html;
    return s;
}

protected void GetWebPageWorker()
{
    using (WebBrowser browser = new WebBrowser())
    {
        //  browser.ClientSize = new Size(_width, _height);
        browser.ScrollBarsEnabled = false;
        browser.ScriptErrorsSuppressed = true;
        browser.Navigate(_url);
        browser.DocumentCompleted += new WebBrowserDocumentCompletedEventHandler(webBrowser1_DocumentCompleted);
        // Wait for control to load page
        while (browser.ReadyState != WebBrowserReadyState.Complete)
            Application.DoEvents();

        html = browser.DocumentText;

    }
}

这很好但是我希望在使用相同WebBrowser对象的类中添加其他方法,所以添加类似的东西 -

private void webBrowser1_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
    {

            if (browser.Document.Body.InnerHtml != null)
            {


                 browse();

            }

    }

private void browse(object sender, EventArgs e)
    {

            browser.Navigate("url");


    }

但是我无法访问WebBrowser对象,因为它不是全局的,如果我将其设置为全局aspx不允许这可能吗?

1 个答案:

答案 0 :(得分:1)

您无需将其设为全局。您可以在CustomBrowser类中定义WebBrowser的私有实例,如下所示:

private WebBrowser _browser;
public CustomBrowser()
{
    _browser = new WebBrowser();
}

通过这种方式,您的新方法可以访问同一个WebBrowser实例,即_browser。您的CustomBrowser类需要实现IDisposable接口,因为WebBrowser是一次性对象。例如:

public void Dispose()
{
    if (_browser != null)
    {
        _browser.Stop();

        if (!_browser.IsDisposed)
        {
            _browser.Dispose();
        }
    }
}

实施IDisposable

的参考