WPF Web浏览器控件和DPI缩放

我正在使用使用Web浏览器控件的WPF应用程序，并且遇到高DPI缩放问题。WPF Web浏览器控件和DPI缩放

它看起来像Web浏览器控件不正确地尊重系统的DPI设置，而其余的WPF应用程序正在适当缩放UI。这意味着，在更高级别的级别上，WPF界面变得更大，而Web浏览器内容保持原来的，现在更小的外观尺寸。

下面是使用两个Web浏览器控件的WPF应用程序的屏幕捕获示例。

100％定标：

150％定标：在第二图像中

通知Web浏览器的缩放比所述第一图像相对于在更小的主要的表单内容（工具栏/菜单/状态栏）。

是否有某种方法可以强制Web浏览器控件正确使用从应用程序继承的高DPI设置？

这个MSDN链接： Addressing DPI Issues

显示了一个非常低的水平的方法（在文档的底部）实现自定义Web浏览器的COM接口，但我想知道是否有可能解决这个问题的更清洁的方式。

来源

2016-08-03 Rick Strahl

将包裹在一个视框帮助Web浏览器？ –

下面是一个工具类的代码，它允许您停用WPF的WebBrowser上下文菜单。它还允许您抑制脚本错误（WPF WebBrowser control - how to supress script errors？）并更改IE的DOCHOSTUIFLAG。

用法示例：

public partial class Player : Window 
{ 
    private WebBrowserHostUIHandler _wbHandler; 

    public Player() 
    { 
     InitializeComponent(); 
     ... 
     _wbHandler = new WebBrowserHostUIHandler(MyWebBrower); 
     _wbHandler.IsWebBrowserContextMenuEnabled = true; 
    } 
}

实用代码：

public class WebBrowserHostUIHandler : Native.IDocHostUIHandler 
{ 
    private const uint E_NOTIMPL = 0x80004001; 
    private const uint S_OK = 0; 
    private const uint S_FALSE = 1; 

    public WebBrowserHostUIHandler(WebBrowser browser) 
    { 
     if (browser == null) 
      throw new ArgumentNullException("browser"); 

     Browser = browser; 
     browser.LoadCompleted += OnLoadCompleted; 
     browser.Navigated += OnNavigated; 
     IsWebBrowserContextMenuEnabled = true; 
     Flags |= HostUIFlags.ENABLE_REDIRECT_NOTIFICATION; 
    } 

    public WebBrowser Browser { get; private set; } 
    public HostUIFlags Flags { get; set; } 
    public bool IsWebBrowserContextMenuEnabled { get; set; } 
    public bool ScriptErrorsSuppressed { get; set; } 

    private void OnNavigated(object sender, NavigationEventArgs e) 
    { 
     SetSilent(Browser, ScriptErrorsSuppressed); 
    } 

    private void OnLoadCompleted(object sender, NavigationEventArgs e) 
    { 
     Native.ICustomDoc doc = Browser.Document as Native.ICustomDoc; 
     if (doc != null) 
     { 
      doc.SetUIHandler(this); 
     } 
    } 

    uint Native.IDocHostUIHandler.ShowContextMenu(int dwID, Native.POINT pt, object pcmdtReserved, object pdispReserved) 
    { 
     return IsWebBrowserContextMenuEnabled ? S_FALSE : S_OK; 
    } 

    uint Native.IDocHostUIHandler.GetHostInfo(ref Native.DOCHOSTUIINFO info) 
    { 
     info.dwFlags = (int)Flags; 
     info.dwDoubleClick = 0; 
     return S_OK; 
    } 

    uint Native.IDocHostUIHandler.ShowUI(int dwID, object activeObject, object commandTarget, object frame, object doc) 
    { 
     return E_NOTIMPL; 
    } 

    uint Native.IDocHostUIHandler.HideUI() 
    { 
     return E_NOTIMPL; 
    } 

    uint Native.IDocHostUIHandler.UpdateUI() 
    { 
     return E_NOTIMPL; 
    } 

    uint Native.IDocHostUIHandler.EnableModeless(bool fEnable) 
    { 
     return E_NOTIMPL; 
    } 

    uint Native.IDocHostUIHandler.OnDocWindowActivate(bool fActivate) 
    { 
     return E_NOTIMPL; 
    } 

    uint Native.IDocHostUIHandler.OnFrameWindowActivate(bool fActivate) 
    { 
     return E_NOTIMPL; 
    } 

    uint Native.IDocHostUIHandler.ResizeBorder(Native.COMRECT rect, object doc, bool fFrameWindow) 
    { 
     return E_NOTIMPL; 
    } 

    uint Native.IDocHostUIHandler.TranslateAccelerator(ref System.Windows.Forms.Message msg, ref Guid group, int nCmdID) 
    { 
     return S_FALSE; 
    } 

    uint Native.IDocHostUIHandler.GetOptionKeyPath(string[] pbstrKey, int dw) 
    { 
     return E_NOTIMPL; 
    } 

    uint Native.IDocHostUIHandler.GetDropTarget(object pDropTarget, out object ppDropTarget) 
    { 
     ppDropTarget = null; 
     return E_NOTIMPL; 
    } 

    uint Native.IDocHostUIHandler.GetExternal(out object ppDispatch) 
    { 
     ppDispatch = Browser.ObjectForScripting; 
     return S_OK; 
    } 

    uint Native.IDocHostUIHandler.TranslateUrl(int dwTranslate, string strURLIn, out string pstrURLOut) 
    { 
     pstrURLOut = null; 
     return E_NOTIMPL; 
    } 

    uint Native.IDocHostUIHandler.FilterDataObject(IDataObject pDO, out IDataObject ppDORet) 
    { 
     ppDORet = null; 
     return E_NOTIMPL; 
    } 

    public static void SetSilent(WebBrowser browser, bool silent) 
    { 
     Native.IOleServiceProvider sp = browser.Document as Native.IOleServiceProvider; 
     if (sp != null) 
     { 
      Guid IID_IWebBrowserApp = new Guid("0002DF05-0000-0000-C000-000000000046"); 
      Guid IID_IWebBrowser2 = new Guid("D30C1661-CDAF-11d0-8A3E-00C04FC9E26E"); 

      object webBrowser; 
      sp.QueryService(ref IID_IWebBrowserApp, ref IID_IWebBrowser2, out webBrowser); 
      if (webBrowser != null) 
      { 
       webBrowser.GetType().InvokeMember("Silent", BindingFlags.Instance | BindingFlags.Public | BindingFlags.PutDispProperty, null, webBrowser, new object[] { silent }); 
      } 
     } 
    } 
} 

internal static class Native 
{ 
    [ComImport, Guid("BD3F23C0-D43E-11CF-893B-00AA00BDCE1A"), InterfaceType(ComInterfaceType.InterfaceIsIUnknown)] 
    internal interface IDocHostUIHandler 
    { 
     [PreserveSig] 
     uint ShowContextMenu(int dwID, POINT pt, [MarshalAs(UnmanagedType.Interface)] object pcmdtReserved, [MarshalAs(UnmanagedType.Interface)] object pdispReserved); 

     [PreserveSig] 
     uint GetHostInfo(ref DOCHOSTUIINFO info); 

     [PreserveSig] 
     uint ShowUI(int dwID, [MarshalAs(UnmanagedType.Interface)] object activeObject, [MarshalAs(UnmanagedType.Interface)] object commandTarget, [MarshalAs(UnmanagedType.Interface)] object frame, [MarshalAs(UnmanagedType.Interface)] object doc); 

     [PreserveSig] 
     uint HideUI(); 

     [PreserveSig] 
     uint UpdateUI(); 

     [PreserveSig] 
     uint EnableModeless(bool fEnable); 

     [PreserveSig] 
     uint OnDocWindowActivate(bool fActivate); 

     [PreserveSig] 
     uint OnFrameWindowActivate(bool fActivate); 

     [PreserveSig] 
     uint ResizeBorder(COMRECT rect, [MarshalAs(UnmanagedType.Interface)] object doc, bool fFrameWindow); 

     [PreserveSig] 
     uint TranslateAccelerator(ref System.Windows.Forms.Message msg, ref Guid group, int nCmdID); 

     [PreserveSig] 
     uint GetOptionKeyPath([Out, MarshalAs(UnmanagedType.LPArray)] string[] pbstrKey, int dw); 

     [PreserveSig] 
     uint GetDropTarget([In, MarshalAs(UnmanagedType.Interface)] object pDropTarget, [MarshalAs(UnmanagedType.Interface)] out object ppDropTarget); 

     [PreserveSig] 
     uint GetExternal([MarshalAs(UnmanagedType.IDispatch)] out object ppDispatch); 

     [PreserveSig] 
     uint TranslateUrl(int dwTranslate, [MarshalAs(UnmanagedType.LPWStr)] string strURLIn, [MarshalAs(UnmanagedType.LPWStr)] out string pstrURLOut); 

     [PreserveSig] 
     uint FilterDataObject(IDataObject pDO, out IDataObject ppDORet); 
    } 

    [StructLayout(LayoutKind.Sequential)] 
    internal struct DOCHOSTUIINFO 
    { 
     public int cbSize; 
     public int dwFlags; 
     public int dwDoubleClick; 
     public IntPtr dwReserved1; 
     public IntPtr dwReserved2; 
    } 

    [StructLayout(LayoutKind.Sequential)] 
    internal struct COMRECT 
    { 
     public int left; 
     public int top; 
     public int right; 
     public int bottom; 
    } 

    [StructLayout(LayoutKind.Sequential)] 
    internal class POINT 
    { 
     public int x; 
     public int y; 
    } 

    [ComImport, Guid("3050F3F0-98B5-11CF-BB82-00AA00BDCE0B"), InterfaceType(ComInterfaceType.InterfaceIsIUnknown)] 
    internal interface ICustomDoc 
    { 
     [PreserveSig] 
     int SetUIHandler(IDocHostUIHandler pUIHandler); 
    } 

    [ComImport, Guid("6D5140C1-7436-11CE-8034-00AA006009FA"), InterfaceType(ComInterfaceType.InterfaceIsIUnknown)] 
    internal interface IOleServiceProvider 
    { 
     [PreserveSig] 
     uint QueryService([In] ref Guid guidService, [In] ref Guid riid, [MarshalAs(UnmanagedType.IDispatch)] out object ppvObject); 
    } 
} 

[Flags] 
public enum HostUIFlags 
{ 
    DIALOG = 0x00000001, 
    DISABLE_HELP_MENU = 0x00000002, 
    NO3DBORDER = 0x00000004, 
    SCROLL_NO = 0x00000008, 
    DISABLE_SCRIPT_INACTIVE = 0x00000010, 
    OPENNEWWIN = 0x00000020, 
    DISABLE_OFFSCREEN = 0x00000040, 
    FLAT_SCROLLBAR = 0x00000080, 
    DIV_BLOCKDEFAULT = 0x00000100, 
    ACTIVATE_CLIENTHIT_ONLY = 0x00000200, 
    OVERRIDEBEHAVIORFACTORY = 0x00000400, 
    CODEPAGELINKEDFONTS = 0x00000800, 
    URL_ENCODING_DISABLE_UTF8 = 0x00001000, 
    URL_ENCODING_ENABLE_UTF8 = 0x00002000, 
    ENABLE_FORMS_AUTOCOMPLETE = 0x00004000, 
    ENABLE_INPLACE_NAVIGATION = 0x00010000, 
    IME_ENABLE_RECONVERSION = 0x00020000, 
    THEME = 0x00040000, 
    NOTHEME = 0x00080000, 
    NOPICS = 0x00100000, 
    NO3DOUTERBORDER = 0x00200000, 
    DISABLE_EDIT_NS_FIXUP = 0x00400000, 
    LOCAL_MACHINE_ACCESS_CHECK = 0x00800000, 
    DISABLE_UNTRUSTEDPROTOCOL = 0x01000000, 
    HOST_NAVIGATES = 0x02000000, 
    ENABLE_REDIRECT_NOTIFICATION = 0x04000000, 
    USE_WINDOWLESS_SELECTCONTROL = 0x08000000, 
    USE_WINDOWED_SELECTCONTROL = 0x10000000, 
    ENABLE_ACTIVEX_INACTIVATE_MODE = 0x20000000, 
    DPI_AWARE = 0x40000000 
}

来源

2016-11-17 14:41:16 gmetax

我发现我的想法是实现所需的功能（提供了最好的方式，你反正需要指定FEATURE_BROWSER_EMULATION在注册表中使用最新的IE版本）。

所有你需要做的，是建立在HKCU\Software\Microsoft\Internet Explorer\Main\FeatureControl名为FEATURE_96DPI_PIXEL一个新的密钥，有添加可执行的程序DWORD (32-bit)型的，与应用程序EXE的键名和1价值。

在实际实例化WebBrowser组件之前检查应用程序启动时的设置，并且应该没问题。

原帖（与其他可能的特征）： https://www.reddit.com/r/dotnet/comments/2j5m6m/wpf_webbrowser_control_alternatives/

来源

2017-08-05 13:31:56

根据[MSDN]（https://msdn.microsoft.com/en-us/library/ee330738（v = vs.85）.aspx），此功能已过时，不应使用。 – Funbit

@Funbit是的。但我怀疑，他们将永远删除它，然后再实际移除IE本身。而且这是唯一的解决方案，它实际上有效，我花了近两天的时间解决它。 –

WPF Web浏览器控件和DPI缩放

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