C#引用CefSharp并屏蔽鼠标右键和禁止拖动放置事件

目录：

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C#引用CefSharp

在C#的设计界面，添加panel控件用来放置CEFSharp浏览器。
CEFSharp浏览器dll添加引用

using CefSharp;
using CefSharp.WinForms;

CEFSharp浏览器初始化代码：

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);
}

上述完成之后就可以运行了！
注意事项：平台选择X86，右侧解决方案中引用DLL文件，文件放在\项目名\bin\x86\Debug

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C#添加代码屏蔽鼠标右键

在屏蔽之前先查看namespace CefSharp.WinForms内的代码

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 AddressChanged;
    public event EventHandler StatusMessage;
    public event EventHandler ConsoleMessage;
    public event EventHandler LoadingStateChanged;
    public event EventHandler FrameLoadEnd;
    public event EventHandler FrameLoadStart;
    public event EventHandler LoadError;
    public event EventHandler IsBrowserInitializedChanged;
    public event EventHandler 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);
}

我们在其中的public IContextMenuHandler MenuHandler { get; set; }接口中更改鼠标右键事件。
方法为继承该类接口，并重写。实现方式如下：

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;
   }
}

定义完之后在CEFSharp代码初始化中引用。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);
}

之后运行，会发现已经屏蔽鼠标右键。

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C#添加代码屏蔽拖动放置事件

屏蔽拖动放置事件和屏蔽鼠标右键类似。我们在其中的public IDragHandler DragHandler { get; set; }接口中更改拖动放置事件。
方法为继承该类接口，并重写。实现方式如下：

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 regions)
    {
        //throw new NotImplementedException();
    }
}

return true;为禁止。定义完之后在CEFSharp代码初始化中引用。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);
}

之后运行，会发现已经屏蔽鼠标右键和拖动放置事件。

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