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javascript window.opener对象在.NET WebBrowser控件新窗口上为空

window.opener webbrowser-control webforms javascript .net

Proximo · 技术社区 · 15 年前

我在.NET框架的Webbroswer控件中有一个弹出窗口,我用类似这样的NewWindow事件处理程序捕获它。

WebBrowser w = new WebBrowser();
SHDocVw.WebBrowser_V1 web = (SHDocVw.WebBrowser_V1)w.ActiveXInstance;
web.NewWindow += new SHDocVw.DWebBrowserEvents_NewWindowEventHandler(web_NewWindow);

新弹出窗口位于新窗体中,其中包含WebBrowser控件的新实例。

void web_NewWindow(string URL, int Flags, string TargetFrameName, ref object PostData, string Headers, ref bool Processed)
    {
        Processed = true;
        WebBrowser w2 = new WebBrowser();

        Form PopUp = new Form();
        PopUp.Controls.Clear();
        PopUp.Controls.Add(w2);
        w2.Dock = DockStyle.Fill;
        PopUp.Show();
        w2.Navigate(URL);
        w2.DocumentCompleted += new WebBrowserDocumentCompletedEventHandler(w2_DocumentCompleted);
    }

我的问题是window.opener对象在进程中为空。

页面使用该字段将用户返回到原始窗口,并在表单上填充一些值。

是否仍要将window.opener对象从一个WebBrowser控件传递到下一个?这似乎不可能奏效,但我必须尝试。

谢谢

2 回复 | 直到 7 年前

talles 8 年前

是的,有方法传递窗口。将对象从一个WebBrowser控件打开到下一个。
有关详细信息,请参阅下面的代码。

public class WebBrowserTest
{
    private WebBrowser _wParent;

    // entry point
    public void Navigate(string url)
    {
        _wParent = new WebBrowser();
        SHDocVw.WebBrowser_V1 v1 = (SHDocVw.WebBrowser_V1)w.ActiveXInstance;
        v1.NewWindow += v1_NewWindow;
    }

    private void v1_NewWindow(string URL, int Flags, string TargetFrameName, ref object PostData, string Headers, ref bool Processed)
    {
        // tell, that we'll open new page by ourselves
        Processed = true;

        // open page by ourselves
        WebBrowser w2 = new WebBrowser();
        w2.Navigate(url);

        // wait for document will be loaded to do some magic stuff then
        w2.DocumentCompleted += w2_DocumentCompleted;
    }

    // sets opener for popup window
    // after document in popup window was loaded
    private void w2_DocumentCompleted(object sender, EventArgs e)
    {
        WebBrowser popup = (WebBrowser)sender;
        SetOpener(_wparent, popup);
    }

    // My most favorite method :)
    // Contains exactly that hack, we're talking about
    private void SetOpener(WebBrowser opener, WebBrowser popup)
    {    
        HtmlWindow htmlPopup = popup.Document.Window;
        HtmlWindow htmlOpener = opener.Document.Window;

        // let the dark magic begin

        // actually, WebBrowser control is .NET wrapper around IE COM interfaces
        // we can get a bit closer to them access by getting reference to 
        // "mshtml.IHTMLWindow2" field via Reflection
        FieldInfo fi = htmlPopup.GetType().GetField("htmlWindow2", BindingFlags.Instance | BindingFlags.NonPublic);

        mshtml.IHTMLWindow2 htmlPopup2 = (mshtml.IHTMLWindow2)fi.GetValue(htmlPopup);
        mshtml.IHTMLWindow2 htmlOpener2 = (mshtml.IHTMLWindow2)fi.GetValue(htmlOpener);

        // opener is set here
        htmlPopup2.window.opener = htmlOpener2.window.self;
    }
}

P.S.我明白,这仍然是事实的可能性很小,但是,无论如何=)

yogihw 7 年前

对于那些正在寻找WPF版本的解决方案的用户,请将setopener函数重写为以下内容:

public static void SetOpener(System.Windows.Controls.WebBrowser opener, System.Windows.Controls.WebBrowser popup)
{
    mshtml.IHTMLWindow2 htmlPopup = (popup.Document as mshtml.HTMLDocument).parentWindow;
    mshtml.IHTMLWindow2 htmlOpener = (opener.Document as mshtml.HTMLDocument).parentWindow;
    htmlPopup.window.opener = htmlOpener.window.self;
}

在子侧WebBrowser的事件处理程序中使用它:

private void browser_LoadCompleted(object sender, NavigationEventArgs eventArgs)
        {
            WebBrowser popup = (WebBrowser)sender;
            SetOpener(parentWebBrowser, popup);
        }

以及WPF部分:

<Grid>
    <WebBrowser Name="webBrowser" LoadCompleted="browser_LoadCompleted" />
</Grid>

希望我能把别人从数小时的试验、错误和无休止的谷歌搜索中拯救出来。