CefSharp方法汇总

1.取消右键功能

2.设置默认语言

3.设置cookie

4.读取cookie

本节汇总一些关于cefsharp的使用方法，包括c#调用HTML页面中的js，也可以是HTML中的按钮调用c#的方法。汇总后，方便以后使用和查看。

1.取消右键功能

建立MenuHandler类，继承cef中的IContextMenuHandler，并且实现他的接口


 public class MenuHandler : IContextMenuHandler
    {
 
        void CefSharp.IContextMenuHandler.OnBeforeContextMenu(CefSharp.IWebBrowser browserControl, CefSharp.IBrowser browser, CefSharp.IFrame frame, CefSharp.IContextMenuParams parameters, CefSharp.IMenuModel model)
        {
            model.Clear();
        }
 
        bool CefSharp.IContextMenuHandler.OnContextMenuCommand(CefSharp.IWebBrowser browserControl, CefSharp.IBrowser browser, CefSharp.IFrame frame, CefSharp.IContextMenuParams parameters, CefSharp.CefMenuCommand commandId, CefSharp.CefEventFlags eventFlags)
        {
            //throw new NotImplementedException();
            return false;
        }
 
        void CefSharp.IContextMenuHandler.OnContextMenuDismissed(CefSharp.IWebBrowser browserControl, CefSharp.IBrowser browser, CefSharp.IFrame frame)
        {
            //throw new NotImplementedException();
        }
 
        bool CefSharp.IContextMenuHandler.RunContextMenu(CefSharp.IWebBrowser browserControl, CefSharp.IBrowser browser, CefSharp.IFrame frame, CefSharp.IContextMenuParams parameters, CefSharp.IMenuModel model, CefSharp.IRunContextMenuCallback callback)
        {
            return false;
        }
    }

使用的时候

chromeBrowser.MenuHandler = new MenuHandler();

2.设置默认语言


CefSettings settings = new CefSettings();
settings.Locale = "zh-CN";// 设置语言
Cef.Initialize(settings, performDependencyCheck: true, browserProcessHandler: null);//以上这段代码一定要在new ChromiumWebBrowser之前调用

3.设置cookie

可以参考下面读取cookie


    var cookieManager = CefSharp.Cef.GetGlobalCookieManager();
            cookieManager.SetCookieAsync("http://localhost", new CefSharp.Cookie()
            {
                Domain = "localhost",           //这里是localhost，就会出现设置的值和HTML中的值
                Name = "1",
                Value = "2",
                Expires = DateTime.MinValue
            });

4.读取cookie

一般来说，cookie都是浏览器设置好了，所以，可以直接读取cookie。

一、使用js读取

1.HTML


html>
 
<html lang="en" xmlns="http://www.w3.org/1999/xhtml">
<head>
    <meta charset="utf-8" />
    <title>title>
head>
<body>
    this is page 111
    <br><a href="page4.html">to page4a>
    <script language=javascript>
 
document.cookie="username=Tom&age=22";
 
    script>
body>
html>

2.先把HTML发布成网站，代码如下


using CefSharp;
using CefSharp.WinForms;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Windows.Forms;
 
namespace cef
{
    public partial class Form1 : Form
    {
        ChromiumWebBrowser webBrower = null;
 
        public Form1()
        {
            InitializeComponent();
        }
 
        private void Form1_Load(object sender, EventArgs e)
        {
            //初始化配置
            string path = "http://localhost/1.html";
            webBrower = new ChromiumWebBrowser(path);
            webBrower.Dock = DockStyle.Fill;// 填充方式
 
            this.Controls.Add(webBrower);
        }
        private void button2_Click(object sender, EventArgs e)
        {
            Task t = webBrower.EvaluateScriptAsync("document.cookie");
            t.Wait();
            var cookie = t.Result.Result;
            MessageBox.Show(cookie.ToString());
        }
    }
 
}

二、使用cefsharp读取

1.load中载入

2.WebBrower_FrameLoadEnd事件

3.回调

4.建立Cookie读取对象，继承接口 ICookieVisitor

5.效果

所有代码


using CefSharp;
using CefSharp.WinForms;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Windows.Forms;
 
namespace cef
{
    public partial class Form1 : Form
    {
        ChromiumWebBrowser webBrower = null;
        string cookies;
 
        public Form1()
        {
            InitializeComponent();
        }
 
        private void Form1_Load(object sender, EventArgs e)
        {
            //初始化配置
            string path = "http://localhost/1.html";
            webBrower = new ChromiumWebBrowser(path);
            webBrower.Dock = DockStyle.Fill;// 填充方式
            webBrower.FrameLoadEnd += WebBrower_FrameLoadEnd;
            this.Controls.Add(webBrower);
            //加载测试页面
            webBrower.Load("http://localhost/1.html");
 
            //模拟写入cookie(测试页面，也有一个cookie)
            var cookieManager = CefSharp.Cef.GetGlobalCookieManager();
            cookieManager.SetCookieAsync("http://localhost", new CefSharp.Cookie()
            {
                Domain = "localhost",           //这里是localhost，就会出现设置的值和HTML中的值
                Name = "1",
                Value = "2",
                Expires = DateTime.MinValue
            });
        }
 
        private void WebBrower_FrameLoadEnd(object sender, FrameLoadEndEventArgs e)
        {
            ICookieManager cookieManager = webBrower.GetCookieManager();
            CookieVisitor visitor = new CookieVisitor();
            visitor.SendCookie += visitor_SendCookie;
            cookieManager.VisitAllCookies(visitor);
        }
        private void visitor_SendCookie(CefSharp.Cookie obj)
        {
            cookies += obj.Domain.TrimStart('.') + "^" + obj.Name + "^" + obj.Value + "\r\n";
        }
        public class CookieVisitor : CefSharp.ICookieVisitor
        {
            public event Action SendCookie;
 
            public void Dispose()
            {
 
            }
            public bool Visit(CefSharp.Cookie cookie, int count, int total, ref bool deleteCookie)
            {
                deleteCookie = false;
                if (SendCookie != null)
                {
                    SendCookie(cookie);
                }
 
                return true;
            }
        }
        private void button2_Click(object sender, EventArgs e)
        {
            MessageBox.Show(cookies.ToString());
        }
    }
 
}

三、加载完成后就显示

代码：


  public Action GetCookie;    
  private void Form1_Load(object sender, EventArgs e)
        { 
 
            GetCookie = () =>
            {
                Task t =                 
            webBrower.EvaluateScriptAsync("document.cookie");
                t.Wait();
                var cookie = t.Result.Result;
 
                this.button2.Text = cookie.ToString();
            };
        }
private void WebBrower_FrameLoadEnd(object sender, FrameLoadEndEventArgs e)
        {
 
          //写后面
            this.BeginInvoke(GetCookie);
        }

5.c#调用js

使用c#触发HTML中的js。

HTML代码：


html>
<html lang="en" xmlns="http://www.w3.org/1999/xhtml">
<head>
    <meta charset="utf-8" />
    <title>title>
head>
<body>
    <p>点击按钮执行 <em>displayDate()em> 函数.p>
    <button id="myBtn">点这里button>
    <p id="mytxt">213213p>
    <script>
        document.getElementById("myBtn").onclick = function () { displayDate() };
        function displayDate() {
            document.getElementById("demo").innerHTML = Date();
        }
    script>
    <p id="demo">p>
body>
html>

效果是：

c#中调用

第一种方法

第一句是触发点击按钮事件。

第二句是触发文本修改。


            webBrower.GetBrowser().MainFrame.ExecuteJavaScriptAsync("document.getElementById('myBtn').click();");
            webBrower.GetBrowser().MainFrame.ExecuteJavaScriptAsync("document.getElementById('mytxt').innerHTML='123'");

效果

第二种方法


            var script = string.Format("document.getElementById('myBtn').click();");
            webBrower.GetMainFrame().ExecuteJavaScriptAsync(script);

6.html调用c#

html代码


html>
<html lang="en" xmlns="http://www.w3.org/1999/xhtml">
<head>
    <meta charset="utf-8" />
    <title>ddtitle>
head>
<body>
    <button onclick="AAA.aa()">html调用C#button>
body>
html>

c#代码


using CefSharp;
using CefSharp.WinForms;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Windows.Forms;
 
namespace cef
{
    public partial class Form1 : Form
    {
        private ChromiumWebBrowser chromeBrowser;
        public Form1()
        {
            InitializeComponent();
            InitializeChromium();
        }
        public void InitializeChromium()
        {
            string indexpage = AppDomain.CurrentDomain.BaseDirectory + @"\1.html";
            chromeBrowser = new ChromiumWebBrowser(indexpage);
            this.Controls.Add(chromeBrowser);
            chromeBrowser.Dock = DockStyle.Fill;
            CefSharpSettings.LegacyJavascriptBindingEnabled = true;
            CefSharpSettings.WcfEnabled = true;
            chromeBrowser.JavascriptObjectRepository.Register("AAA", new CefCustomObject(), isAsync: false, options: BindingOptions.DefaultBinder);
        }
    }
    public class CefCustomObject
    {
        public void aa()
        {
            MessageBox.Show("注意方法的命名，坑很多！！！");
        }
    }
 
}

效果

注意：这里调用的方法名称，aa()，之前我写show()，show好像是关键字，一直触发不了，非常的坑人！！！

7. 模拟调用调试F12功能

chromeBrowser.ShowDevTools();

8.关闭窗体


 try
            {
                _instanceBrowser.CloseDevTools();
                _instanceBrowser.GetBrowser().CloseBrowser(true);
            }
            catch { }
 
            try
            {
                if (_instanceBrowser != null)
                {
                    _instanceBrowser.Dispose();
                }
            }
            catch { }
 
            if (!_instanceMainForm.IsDisposed && _instanceMainForm.IsHandleCreated)
            {
                var result = _instanceMainForm.BeginInvoke(new Action(() =>
                {
 
                    if (_instanceMainForm != null && !_instanceMainForm.IsDisposed)
                    {
                        _instanceMainForm.Close();
                        _instanceMainForm.Dispose();
                    }
                }));
                _instanceMainForm.EndInvoke(result);
            }

9.cefsharp中文文档参考

这是GitHub上面的文档，其中有些不对，可能和版本有关系

CefSharp中文帮助文档 · cefsharp/CefSharp Wiki · GitHub

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原文地址：https://blog.csdn.net/u012563853/article/details/126117420