使用 CefSharp 检测 URL 变化

Question

我正在创建一个使用 CefSharp 73.1.130 的软件。我需要在 URL 更改时或至少在页面加载时进行一些检查。

我已经尝试了很多方法，例如：

browser.RenderProcessMessageHandler = new RenderProcessMessageHandler();

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);
    }
}

//Wait for the page to finish loading (all resources will have been loaded,     rendering is likely still happening)
browser.LoadingStateChanged += (sender, args) => {
    //Wait for the Page to finish loading
    if (args.IsLoading == false) {
        browser.ExecuteJavaScriptAsync("alert('All Resources Have Loaded');");
    }
}

还有这个：

    browser.LoadingStateChanged += OnLoadingStateChanged;
private void OnLoadingStateChanged(object sender, LoadingStateChangedEventArgs args) {
    if (!args.IsLoading) {
        // Page has finished loading, do whatever you want here
    }
}

但我不确定我是否正确使用它，所以我每次都会收到错误消息，例如“该名称在当前上下文中不存在”。

这是我的 CefSharp 代码：

    public CefSharp.WinForms.ChromiumWebBrowser browser;
private void InitializeChromium() {
    CefSettings settings = new CefSettings();
    Cef.Initialize(settings);
    browser = new CefSharp.WinForms.ChromiumWebBrowser("https://google.com/");
    browser.Dock = DockStyle.Fill;

    this.wb_panel.Controls.Add(browser);
}

我希望将新的 url 作为输出显示在 RichTextBox

中

Answer 1

欢迎使用 Whosebug，您可以在代码中使用 ChromiumWebBrowser_AddressChanged 事件。 ChromiumWebBrowser.AddressChanged 活动在图书馆网站上有描述。

这是你应该如何使用它：

订阅活动：

browser.AddressChanged += OnBrowserAddressChanged;

定义 OnBrowserAddressChanged 主体以更改 RichBoxText 值：

this.InvokeOnUiThreadIfRequired(() => richTextBox1.Text = e.Address);

完成

完整示例如下：

using CefSharp;
using CefSharp.WinForms;
using CefSharp.WinForms.Internals;

using System;
using System.Windows.Forms;

namespace WindowsFormsApp2
{
    public partial class Form1 : Form
    {
        private readonly ChromiumWebBrowser browser;
        public Form1()
        {
            InitializeComponent();

            browser = new ChromiumWebBrowser("www.google.com")
            {
                Dock = DockStyle.Fill,
            };


            browser.AddressChanged += OnBrowserAddressChanged;

            Controls.Add(browser);
        }

        private void OnBrowserAddressChanged(object sender, AddressChangedEventArgs e)
        {
            this.InvokeOnUiThreadIfRequired(() => Text = e.Address);
        }
    }
}

使用 CefSharp 检测 URL 变化

Detecting an URL change with CefSharp

c#

cefsharp