CefSharpSettings.LegacyJavascriptBindingEnabled = true;ChromiumWebBrowser wb = new ChromiumWebBrowser{// Address = @"D:\RRR\html\html\menu.html"Address = "http://www.baidu.com"};//BindingOptions bo = new BindingOptions();//bo.CamelCaseJavascriptNames = false; wb.RegisterJsObject("bound", new BLL.BoundObject());MainGrid.Children.Add(wb);

 1    /// <summary>
 2         /// 云服务器是否连接
 3         /// </summary>
 4         public void cloudservice(IJavascriptCallback javascriptCallback)
 5         {
 6             const int taskDelay = 3000;
 7
 8             string url = System.Configuration.ConfigurationManager.AppSettings["ConnectionIP"];
 9             string url2 = System.Configuration.ConfigurationManager.AppSettings["ConnectionString"];
10             string[] urls = { url , url2};
11
12             bool status = false;
13             try
14             {
15                 status = BLL.CheckNetState.CheckServeStatus(urls);
16             }
17             catch (Exception ex)
18             {
19             }
20             Task.Run(async () =>
21             {
22                 await Task.Delay(taskDelay);
23
24                 await javascriptCallback.ExecuteAsync(status);
25             });
26
27         }

 <script type="text/javascript">function callback(cloudservice) {//  var result = document.getElementById('cbresult');//   result.innerText += "Callback: " + cloudservice + "" + Date();var online = "../../image/1.png";var local = "../../image/1-1.png";// var cloudservice = true;if (cloudservice == true) {document.getElementById("imageId").src = online;} else {document.getElementById("imageId").src = local;}}function testCallback() {bound.cloudservice(callback);//  var result = document.getElementById('cbresult');//   result.innerText = "The function has returned: " + Date() + "\n";
        }</script>
<button οnclick="testCallback()">Test Callback</button>