C＃CEFSHARP RENDERPROCESSMESSAGEHANDLER示例

Question

我是 C# 新手，正在学习 Cefsharp + javascript。我试图等到页面使用 Cefsharp 完成加载后再执行我的代码。我找到下面的代码片段，并将其添加到一个新类中，在该类中出现关于创建接口的错误，请帮助在这些接口中需要编写什么？

public class RenderProcessMessageHandler : IRenderProcessMessageHandler
{
  // Wait for the underlying `Javascript Context` to be created, this is only called for the main frame.
  // If the page has no javascript, no context will be created.
  void IRenderProcessMessageHandler.OnContextCreated(IWebBrowser browserControl, IBrowser browser, IFrame frame)
  {
    const string script = "document.addEventListener('DOMContentLoaded', function(){ alert('DomLoaded'); });";

    frame.ExecuteJavaScriptAsync(script);
  }
}

这是错误的照片

Answer 1

您需要在接口irenderProcessMessageHandler中实现所有

public class RenderProcessMessageHandler : IRenderProcessMessageHandler
{
  // Wait for the underlying `Javascript Context` to be created, this is only called for the main frame.
  // If the page has no javascript, no context will be created.
  void IRenderProcessMessageHandler.OnContextCreated(IWebBrowser browserControl, IBrowser browser, IFrame frame)
  {
    const string script = "document.addEventListener('DOMContentLoaded', function(){ alert('DomLoaded'); });";

    frame.ExecuteJavaScriptAsync(script);
  }

void IRenderProcessMessageHandler.OnFocusedNodeChanged(IWebBrowser chromiumWebBrowser, IBrowser browser, IFrame frame, IDomNode node)
        {
            var message = node == null ? "lost focus" : node.ToString();

            Console.WriteLine("OnFocusedNodeChanged() - " + message);
        }
  
  void IRenderProcessMessageHandler.OnContextReleased(IWebBrowser chromiumWebBrowser, IBrowser browser, IFrame frame)
        {
            //The V8Context is about to be released, use this notification to cancel any long running tasks your might have
        }

        void IRenderProcessMessageHandler.OnUncaughtException(IWebBrowser chromiumWebBrowser, IBrowser browser, IFrame frame, JavascriptException exception)
        {
            Console.WriteLine("OnUncaughtException() - " + exception.Message);
        }
}

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