CEF Xilium.CefGlue 在当前窗体中打开全部链接（防止弹窗）

我们在使用Xilium.CefGlue编写浏览器应用程序时。对于嵌入的网页假设有链接会在新窗体打开。这种用户体验会非常差。因此我们须要改动程序，使全部链接都在当前窗体中打开。

首先引用Xilium.CefGlue.dll文件。须要继承Xilium.CefGlue 中的CefLifeSpanHandler类

namespace Xilium.CefGlue
{
    // 摘要:
    //     Implement this interface to handle events related to browser life span. The
    //     methods of this class will be called on the UI thread unless otherwise indicated.
    public abstract class CefLifeSpanHandler

继承CefLifeSpanHandler类。并重写OnBeforePopup方法，实现例如以下：

internal sealed class CwbLifeSpanHandler : CefLifeSpanHandler
    {
        private ChromeWebBrowser webBrowser;
        public CwbLifeSpanHandler(ChromeWebBrowser browser)
        {
            webBrowser = browser;
        }

        protected override void OnAfterCreated(CefBrowser browser)
        {
            base.OnAfterCreated(browser);
            webBrowser.OnCreated(browser);
        }

        protected override bool DoClose(CefBrowser browser)
        {
            return false;
        }

        protected override bool OnBeforePopup(CefBrowser browser, CefFrame frame, string targetUrl, string targetFrameName, CefWindowOpenDisposition targetDisposition, bool userGesture, CefPopupFeatures popupFeatures, CefWindowInfo windowInfo, ref CefClient client, CefBrowserSettings settings, ref bool noJavascriptAccess)
        {
            bool res = false;
            if (!string.IsNullOrEmpty(targetUrl))
            {
                if (webBrowser.selfRequest != null)
                {
                    CefRequest req = CefRequest.Create();
                    req.FirstPartyForCookies = webBrowser.selfRequest.FirstPartyForCookies;
                    req.Options = webBrowser.selfRequest.Options;
                    System.Collections.Specialized.NameValueCollection h = new System.Collections.Specialized.NameValueCollection();
                    h.Add("Content-Type", "application/x-www-form-urlencoded");
                    req.Set(targetUrl, webBrowser.selfRequest.Method, null, webBrowser.selfRequest.GetHeaderMap());
                    webBrowser.selfRequest = req;
                }
                //在该处实现用当前页面打开全部新开的窗体
                webBrowser.OpenUrl(targetUrl);
                res = true;
                if (res)
                    return res;
            }
            return base.OnBeforePopup(browser, frame, targetUrl, targetFrameName, targetDisposition, userGesture, popupFeatures, windowInfo, ref client, settings, ref noJavascriptAccess);
            return res;
            
        }
    }

尽管改动了浏览器的新窗体处理方法，但浏览器并不会自己主动载入到我们的CwbCefLifeSpanHandler类，接下来我们须要在实现CefClient的ClientBrowser类中加上我们的CwbCefLifeSpanHandler实现类：

public sealed class ClientBrowser : CefClient
{
        private readonly CwbLifeSpanHandler _lifeSpanHandler;

        private ChromeWebBrowser webBrowser;
        public ClientBrowser(ChromeWebBrowser browser)
        {
            webBrowser = browser;
            _lifeSpanHandler = new CwbLifeSpanHandler(browser);
        }

        public override CefLifeSpanHandler GetLifeSpanHandler()
        {
            return _lifeSpanHandler;
        }
}

ChromeWebBrowser是我自己对Browser的包装，

大家能够去下载实例： CEF Xilium.CefGlue 简单包装  查看

到此我们的工作就已经完毕，能够直接执行程序进行測试了