C#引用CefSharp并屏蔽滑鼠右鍵和禁止拖動放置事件

原文: C#引用CefSharp并屏蔽滑鼠右鍵和禁止拖動放置事件 版權聲明：本文為部落客原創文章，未經部落客允許不得轉載。 https://blog.csdn.net/u013564470/article/details/78339957

目錄：

• 目錄
  • C引用CefSharp
  • C添加代碼屏蔽滑鼠右鍵
  • C添加代碼屏蔽拖動放置事件

C#引用CefSharp

在C#的設計界面，添加panel控件用來放置CEFSharp浏覽器。

CEFSharp浏覽器dll添加引用

using CefSharp;
using CefSharp.WinForms;           

CEFSharp浏覽器初始化代碼：

public Form1()
{
    InitializeComponent();
    InitBrowser();
}
public ChromiumWebBrowser browser;
public void InitBrowser()
{
    Cef.Initialize(new CefSettings());
    browser = new ChromiumWebBrowser("http://my.csdn.net/u013564470");
    browser.Dock = DockStyle.Fill;
    panel1.Controls.Add(browser);
}           

上述完成之後就可以運作了！

注意事項：平台選擇X86，右側解決方案中引用DLL檔案，檔案放在\項目名\bin\x86\Debug

C#添加代碼屏蔽滑鼠右鍵

在屏蔽之前先檢視namespace CefSharp.WinForms内的代碼

public class ChromiumWebBrowser : Control, IWebBrowserInternal, IWinFormsWebBrowser, IWebBrowser, IDisposable
{
    public ChromiumWebBrowser(string address);

    public IDownloadHandler DownloadHandler { get; set; }
    public ILoadHandler LoadHandler { get; set; }
    public IDisplayHandler DisplayHandler { get; set; }
    public IContextMenuHandler MenuHandler { get; set; }
    public IRenderProcessMessageHandler RenderProcessMessageHandler { get; set; }
    public IFindHandler FindHandler { get; set; }
    public IRequestHandler RequestHandler { get; set; }
    public IFocusHandler FocusHandler { get; set; }
    public IResourceHandlerFactory ResourceHandlerFactory { get; set; }
    public IGeolocationHandler GeolocationHandler { get; set; }
    public bool CanGoForward { get; }
    public bool CanGoBack { get; }
    public bool IsBrowserInitialized { get; }
    public override bool Focused { get; }
    public IDragHandler DragHandler { get; set; }
    public IKeyboardHandler KeyboardHandler { get; set; }
    public ILifeSpanHandler LifeSpanHandler { get; set; }
    public IDialogHandler DialogHandler { get; set; }
    public string Address { get; }
    public string TooltipText { get; }
    public bool IsLoading { get; }
    public RequestContext RequestContext { get; set; }
    public BrowserSettings BrowserSettings { get; set; }
    public bool IsActivating { get; set; }
    public IJsDialogHandler JsDialogHandler { get; set; }

    public event EventHandler<AddressChangedEventArgs> AddressChanged;
    public event EventHandler<StatusMessageEventArgs> StatusMessage;
    public event EventHandler<ConsoleMessageEventArgs> ConsoleMessage;
    public event EventHandler<LoadingStateChangedEventArgs> LoadingStateChanged;
    public event EventHandler<FrameLoadEndEventArgs> FrameLoadEnd;
    public event EventHandler<FrameLoadStartEventArgs> FrameLoadStart;
    public event EventHandler<LoadErrorEventArgs> LoadError;
    public event EventHandler<IsBrowserInitializedChangedEventArgs> IsBrowserInitializedChanged;
    public event EventHandler<TitleChangedEventArgs> TitleChanged;

    public IBrowser GetBrowser();
    public void Load(string url);
    public void RegisterAsyncJsObject(string name, object objectToBind, bool camelCaseJavascriptNames = true);
    public void RegisterJsObject(string name, object objectToBind, bool camelCaseJavascriptNames = true);
    protected override void Dispose(bool disposing);
    protected override void OnGotFocus(EventArgs e);
    protected override void OnHandleCreated(EventArgs e);
    protected override void OnSizeChanged(EventArgs e);
}           

我們在其中的public IContextMenuHandler MenuHandler { get; set; }接口中更改滑鼠右鍵事件。

方法為繼承該類接口，并重寫。實作方式如下：

public class MenuHandler : IContextMenuHandler
{
   public void OnBeforeContextMenu(IWebBrowser browserControl, IBrowser browser, IFrame frame, IContextMenuParams parameters, IMenuModel model)
   {
       model.Clear();
   }
   public bool OnContextMenuCommand(IWebBrowser browserControl, IBrowser browser, IFrame frame, IContextMenuParams parameters, CefMenuCommand commandId, CefEventFlags eventFlags)
   {
       return false;
   }
   public void OnContextMenuDismissed(IWebBrowser browserControl, IBrowser browser, IFrame frame)
   {
   }
   public bool RunContextMenu(IWebBrowser browserControl, IBrowser browser, IFrame frame, IContextMenuParams parameters, IMenuModel model, IRunContextMenuCallback callback)
   {
       return false;
   }
}           

定義完之後在CEFSharp代碼初始化中引用。如下：

public ChromiumWebBrowser browser;
public void InitBrowser()
{
    Cef.Initialize(new CefSettings());
    browser = new ChromiumWebBrowser("http://my.csdn.net/u013564470");
    browser.MenuHandler = new MenuHandler();
    browser.Dock = DockStyle.Fill;
    panel1.Controls.Add(browser);
}           

之後運作，會發現已經屏蔽滑鼠右鍵。

C#添加代碼屏蔽拖動放置事件

屏蔽拖動放置事件和屏蔽滑鼠右鍵類似。我們在其中的public IDragHandler DragHandler { get; set; }接口中更改拖動放置事件。

public class DragHandler : IDragHandler
{
    public bool OnDragEnter(IWebBrowser browserControl, IBrowser browser, IDragData dragData, DragOperationsMask mask)
    {
        return true;// false;//throw new NotImplementedException();
    }
    public void OnDraggableRegionsChanged(IWebBrowser browserControl, IBrowser browser, IList<DraggableRegion> regions)
    {
        //throw new NotImplementedException();
    }
}           

return true;為禁止。定義完之後在CEFSharp代碼初始化中引用。如下：

public ChromiumWebBrowser browser;
public void InitBrowser()
{
    Cef.Initialize(new CefSettings());
    browser = new ChromiumWebBrowser("http://my.csdn.net/u013564470");
    browser.MenuHandler = new MenuHandler();
    browser.DragHandler = new DragHandler();
    browser.Dock = DockStyle.Fill;
    panel1.Controls.Add(browser);
}           

之後運作，會發現已經屏蔽滑鼠右鍵和拖動放置事件。