WPF WebBrowser 控件放大/缩小支持吗? [英] WPF WebBrowser control zoom in/out support?

问题描述

对于 WPF WebBrowser 控件，有没有办法复制 Internet Explorer 的缩放功能?

For a WPF WebBrowser control, is there a way to duplicate Internet Explorer's zoom functionality?

换句话说，Internet Explorer 具有菜单视图">缩放">75%"，它以 75% 的比例呈现网页.有没有办法让嵌入在 WPF 应用程序中的 Web 浏览器控件执行相同的操作?

In other words, Internet Explorer has the menu View > Zoom > 75%, which renders the web page at 75% scale. Is there a way to make a web browser control, which is embedded in a WPF app, do the same thing?

我看过这个帖子:WPF WebBrowser - 如何缩放内容?

但它似乎只缩放页面而不是页面内容.

But it only seems to scale the page and not the page content.

推荐答案

public partial class TestWindow: UserControl
{
    public TestWindow()
    {
        InitializeComponent();

        browser.LoadCompleted += new LoadCompletedEventHandler(browser_LoadCompleted);
    }

    private void browser_LoadCompleted(object sender, NavigationEventArgs e)
    {
        try
        {

            FieldInfo webBrowserInfo = browser.GetType().GetField("_axIWebBrowser2", BindingFlags.Instance | BindingFlags.NonPublic);

            object comWebBrowser = null;
            object zoomPercent = 120;
            if (webBrowserInfo != null)
                comWebBrowser = webBrowserInfo.GetValue(browser);
            if (comWebBrowser != null)
            {
                InternetExplorer ie = (InternetExplorer)comWebBrowser;
                ie.ExecWB(SHDocVw.OLECMDID.OLECMDID_OPTICAL_ZOOM, SHDocVw.OLECMDEXECOPT.OLECMDEXECOPT_DONTPROMPTUSER, ref zoomPercent, IntPtr.Zero);
            }
        }
        catch (Exception ex)
        {
        }
    }


    public void SetBrowser(string url)
    {
        browser.Navigate(url,null,null,null);

    }

    internal void Destroy()
    {
        try
        {
            if (browser.Parent != null)
            {
                ((Grid)browser.Parent).Children.Remove(browser);
                browser.Navigate("about:blank");
                browser.Dispose();
                browser = null;
            }
        }
        catch { }

    }

}

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