C# 关于浏览器——WebBrowser篇

最近要写一个浏览器包裹一个网站,试了各种浏览器插件,记录一下。

第一个就是微软的WebBrowser,这个很容易,直接拖过来,然后写一下注册表调用IE11的内核显示,这个代码是抄的:

/// 
        /// 修改注册表信息来兼容当前程序
        ///
        ///   
        static void SetWebBrowserFeatures(int ieVersion)
        {
            // don't change the registry if running in-proc inside Visual Studio  
            if (LicenseManager.UsageMode != LicenseUsageMode.Runtime)
                return;

            //获取程序及名称  
            var appName = System.IO.Path.GetFileName(System.Diagnostics.Process.GetCurrentProcess().MainModule.FileName);            

            //得到浏览器的模式的值  
            UInt32 ieMode = GeoEmulationModee(ieVersion);

            var featureControlRegKey = @"HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main\FeatureControl\";

            //设置浏览器对应用程序(appName)以什么模式(ieMode)运行
            Registry.SetValue(featureControlRegKey + "FEATURE_BROWSER_EMULATION",
                appName, ieMode, RegistryValueKind.DWord);

            //为完整的Internet Explorer浏览器启用“打开”的功能         
            Registry.SetValue(featureControlRegKey + "FEATURE_ENABLE_CLIPCHILDREN_OPTIMIZATION",
                appName, 1, RegistryValueKind.DWord);


            Registry.SetValue(featureControlRegKey + "FEATURE_AJAX_CONNECTIONEVENTS",
                appName, 1, RegistryValueKind.DWord);


            Registry.SetValue(featureControlRegKey + "FEATURE_GPU_RENDERING",
                appName, 1, RegistryValueKind.DWord);


            Registry.SetValue(featureControlRegKey + "FEATURE_WEBOC_DOCUMENT_ZOOM",
                appName, 1, RegistryValueKind.DWord);


            Registry.SetValue(featureControlRegKey + "FEATURE_NINPUT_LEGACYMODE",
                appName, 0, RegistryValueKind.DWord);
        }

        ///   
        /// 获取浏览器的版本  
        ///   
        ///   
        static int GetBrowserVersion()
        {
            int browserVersion = 0;
            using (var ieKey = Registry.LocalMachine.OpenSubKey(@"SOFTWARE\Microsoft\Internet Explorer",
                RegistryKeyPermissionCheck.ReadSubTree,
                System.Security.AccessControl.RegistryRights.QueryValues))
            {
                var version = ieKey.GetValue("svcVersion");
                if (null == version)
                {
                    version = ieKey.GetValue("Version");
                    if (null == version)
                        throw new ApplicationException("Microsoft Internet Explorer is required!");
                }
                int.TryParse(version.ToString().Split('.')[0], out browserVersion);
            }

            //如果小于7  
            if (browserVersion < 7)
            {
                throw new ApplicationException("不支持的浏览器版本!");
            }
            return browserVersion;
        }

        ///   
        /// 通过版本得到浏览器模式的值
        ///   
        ///   
        ///   
        static UInt32 GeoEmulationModee(int browserVersion)
        {
            UInt32 mode = 11000; // Internet Explorer 11. Webpages containing standards-based !DOCTYPE directives are displayed in IE11 Standards mode.   
            switch (browserVersion)
            {
                case 7:
                    mode = 7000; // Webpages containing standards-based !DOCTYPE directives are displayed in IE7 Standards mode.   
                    break;
                case 8:
                    mode = 8000; // Webpages containing standards-based !DOCTYPE directives are displayed in IE8 mode.   
                    break;
                case 9:
                    mode = 9000; // Internet Explorer 9. Webpages containing standards-based !DOCTYPE directives are displayed in IE9 mode.                      
                    break;
                case 10:
                    mode = 10000; // Internet Explorer 10.  
                    break;
                case 11:
                    mode = 11000; // Internet Explorer 11  
                    break;
            }
            return mode;
        }

然后在Form的Load里面写:

SetWebBrowserFeatures(11);//内核为11

就OK了,然后就是处理新窗口的问题了,这个有两种情况,一个是网页内容的新窗口,主要是target的处理,添加事件处理函数:

/防止在新窗口打开链接
        private void browser_NewWindow(object sender, CancelEventArgs e)
        {
            e.Cancel = true;
        }

        //替换掉网页中链接的新窗口属性
        private void browser_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
        {
            //this.Text = this.browser.Document.Title;
            foreach (HtmlElement links in this.browser.Document.Links)
            {
                links.SetAttribute("target", "_self");
            }

            foreach (HtmlElement form in this.browser.Document.Forms)
            {
                form.SetAttribute("target", "_self");
            }
        }

还有一种是js的window.open,这个这样处理:在Form_Load里面写

 string jsHtml= "window.open=function(url, title, prop){window.external.jumpUrl(url);}";
mshtml.IHTMLDocument2 doc = browser.Document.DomDocument as mshtml.IHTMLDocument2;
                mshtml.IHTMLWindow2 win = doc.parentWindow as mshtml.IHTMLWindow2;
                win.execScript(jsHtml, "javascript");

需要引用Microsoft.mshtml,其中jumpUrl是程序自身的一个函数,处理传递过来的 Url,通常是直接load一下:

public void jumpUrl(string url)
        {            
            browser.Navigate(url);
        }

要从js里面调用函数,需要引用:

using System.Runtime.InteropServices;

然后在类前面写:

[System.Runtime.InteropServices.ComVisible(true)]
    public partial class mainForm : Form
    {

.......

然后就是各种加载导航操作什么的,这个没什么好说的。

一些坑:

1、这个对js的支持非常弱,尤其是用了jquery的操作,不确定性太多;

2、虽然用了IE内核,但并不是全部支持IE的功能,感觉也就是60~70的样子;

3、对客户机的环境依赖太多,需要装IE的高版本,FrameWorks、VS支持什么的。

总之,不推荐包装复杂的站点,否则就是噩梦。

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