由于不推荐使用其他答案，因此您现在应该这样做：
WebBrowser 控件（WPF 和 WinForms 版本）在许多方面与完整的 IE 不同。您可能希望实现功能控制以使其行为尽可能接近 IE（特别是 FEATURE_BROWSER_EMULATION）。
这是一些代码：
private void SetBrowserFeatureControlKey(string feature, string appName, uint value)
{
using (var key = Registry.CurrentUser.CreateSubKey(
String.Concat(@"Software\Microsoft\Internet Explorer\Main\FeatureControl\", feature),
RegistryKeyPermissionCheck.ReadWriteSubTree))
{
key.SetValue(appName, (UInt32)value, RegistryValueKind.DWord);
}
}
例如：
private void SetBrowserFeatureControl()
{
// http://msdn.microsoft.com/en-us/library/ee330720(v=vs.85).aspx
// FeatureControl settings are per-process
var fileName = System.IO.Path.GetFileName(Process.GetCurrentProcess().MainModule.FileName);
// make the control is not running inside Visual Studio Designer
if (String.Compare(fileName, "devenv.exe", true) == 0 || String.Compare(fileName, "XDesProc.exe", true) == 0)
return;
SetBrowserFeatureControlKey("FEATURE_BROWSER_EMULATION", fileName, GetBrowserEmulationMode()); // Webpages containing standards-based !DOCTYPE directives are displayed in IE10 Standards mode.
SetBrowserFeatureControlKey("FEATURE_AJAX_CONNECTIONEVENTS", fileName, 1);
SetBrowserFeatureControlKey("FEATURE_ENABLE_CLIPCHILDREN_OPTIMIZATION", fileName, 1);
SetBrowserFeatureControlKey("FEATURE_MANAGE_SCRIPT_CIRCULAR_REFS", fileName, 1);
SetBrowserFeatureControlKey("FEATURE_DOMSTORAGE ", fileName, 1);
SetBrowserFeatureControlKey("FEATURE_GPU_RENDERING ", fileName, 1);
SetBrowserFeatureControlKey("FEATURE_IVIEWOBJECTDRAW_DMLT9_WITH_GDI ", fileName, 0);
SetBrowserFeatureControlKey("FEATURE_DISABLE_LEGACY_COMPRESSION", fileName, 1);
SetBrowserFeatureControlKey("FEATURE_LOCALMACHINE_LOCKDOWN", fileName, 0);
SetBrowserFeatureControlKey("FEATURE_BLOCK_LMZ_OBJECT", fileName, 0);
SetBrowserFeatureControlKey("FEATURE_BLOCK_LMZ_SCRIPT", fileName, 0);
SetBrowserFeatureControlKey("FEATURE_DISABLE_NAVIGATION_SOUNDS", fileName, 1);
SetBrowserFeatureControlKey("FEATURE_SCRIPTURL_MITIGATION", fileName, 1);
SetBrowserFeatureControlKey("FEATURE_SPELLCHECKING", fileName, 0);
SetBrowserFeatureControlKey("FEATURE_STATUS_BAR_THROTTLING", fileName, 1);
SetBrowserFeatureControlKey("FEATURE_TABBED_BROWSING", fileName, 1);
SetBrowserFeatureControlKey("FEATURE_VALIDATE_NAVIGATE_URL", fileName, 1);
SetBrowserFeatureControlKey("FEATURE_WEBOC_DOCUMENT_ZOOM", fileName, 1);
SetBrowserFeatureControlKey("FEATURE_WEBOC_POPUPMANAGEMENT", fileName, 0);
SetBrowserFeatureControlKey("FEATURE_WEBOC_MOVESIZECHILD", fileName, 1);
SetBrowserFeatureControlKey("FEATURE_ADDON_MANAGEMENT", fileName, 0);
SetBrowserFeatureControlKey("FEATURE_WEBSOCKET", fileName, 1);
SetBrowserFeatureControlKey("FEATURE_WINDOW_RESTRICTIONS ", fileName, 0);
SetBrowserFeatureControlKey("FEATURE_XMLHTTP", fileName, 1);
}
private UInt32 GetBrowserEmulationMode()
{
int browserVersion = 7;
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);
}
UInt32 mode = 11000; // Internet Explorer 11. Webpages containing standards-based !DOCTYPE directives are displayed in IE11 Standards mode. Default value for Internet Explorer 11.
switch (browserVersion)
{
case 7:
mode = 7000; // Webpages containing standards-based !DOCTYPE directives are displayed in IE7 Standards mode. Default value for applications hosting the WebBrowser Control.
break;
case 8:
mode = 8000; // Webpages containing standards-based !DOCTYPE directives are displayed in IE8 mode. Default value for Internet Explorer 8
break;
case 9:
mode = 9000; // Internet Explorer 9. Webpages containing standards-based !DOCTYPE directives are displayed in IE9 mode. Default value for Internet Explorer 9.
break;
case 10:
mode = 10000; // Internet Explorer 10. Webpages containing standards-based !DOCTYPE directives are displayed in IE10 mode. Default value for Internet Explorer 10.
break;
default:
// use IE11 mode by default
break;
}
return mode;
}
您应该想出自己的一组功能并在 WebBrowser 初始化之前注册它们，例如，在主表单构造函数中：
public MainWindow()
{
SetBrowserFeatureControl();
InitializeComponent();
WebBrowser youtubePlayer = new WebBrowser();
this.Controls.Add(youtubePlayer);
youtubePlayer.Navigate("https://www.youtube.com/embed/dQw4w9WgXcQ");
//...
}
这个答案取自这里：C# webbrowser Ajax call
我在尝试修复运行此代码时遇到的 javascript 错误时发现了它。