• CefSharp进阶

    本节说明一下如何调用HTML网页以及和c#交互的问题。

    使用的环境vs2022，.NET Framework4.8，cefsharp版本75.1.143。

    首先环境问题参考上一篇，CefSharp入门-winform_故里2130的博客-CSDN博客。

    软件系统运行流程：

    总体项目文件预览：

    1.首先我们找一个正常能运行的web网站

    运行后的效果 

     HTML代码

    1.如果调用c#中类的方法，无返回值的话，可以直接调用，js中不需要写调用的代码，例如：cefCustomObject2.ok()

    2.如果调用c#中类的方法，有返回值的话，需要在js中声明方法，然后接收返回的值，并且进行格式化输出，例如：findComputerInfo()，callback(data)

    1. html>
    2. <html lang="zh-CN">
    3. <head>
    4.     <meta charset="utf-8">
    5.     <meta http-equiv="X-UA-Compatible" content="IE=edge">
    6.     <meta name="viewport" content="width=device-width, initial-scale=1">
    7.     
    8.     <title>Bootstrap 101 Templatetitle>
    9.  
    10.     
    11.     <link href="https://cdn.jsdelivr.net/npm/bootstrap@3.3.7/dist/css/bootstrap.min.css" rel="stylesheet">
    12.  
    13.     
    14.     
    15.     
    16. head>
    17. <body>
    18.     <h1>你好，世界！h1>
    19.     
    20.     <button class="btn btn-info" onclick="cefCustomObject2.showDevTools();">浏览器调试工具button>
    21.     <button class="btn btn-primary" onclick="cefCustomObject2.opencmd();">本地命令行工具button>
    22.     <button class="btn btn-primary" id="test">对话框button>
    23.     <button class="btn btn-primary" onclick="cefCustomObject2.ok()">确定button>
    24.     <button class="btn btn-primary" onclick="findComputerInfo()">获取电脑信息button>
    25.     <button class="btn btn-primary" onclick="cefCustomObject2.closeForm();">关闭窗体button>
    26.  
    27.     <ul id="msg">ul>
    28.  
    29.     
    30.     <button type="button" class="btn btn-primary btn-lg" data-toggle="modal" data-target="#myModal">
    31.         Launch demo modal
    32.     button>
    33.  
    34.     
    35.     <div class="modal fade" id="myModal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel">
    36.         <div class="modal-dialog" role="document">
    37.             <div class="modal-content">
    38.                 <div class="modal-header">
    39.                     <button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">×span>button>
    40.                     <h4 class="modal-title" id="myModalLabel">Modal titleh4>
    41.                 div>
    42.                 <div class="modal-body">
    43.                     test
    44.                 div>
    45.                 <div class="modal-footer">
    46.                     <button type="button" class="btn btn-default" data-dismiss="modal">Closebutton>
    47.                     <button type="button" class="btn btn-primary">Save changesbutton>
    48.                 div>
    49.             div>
    50.         div>
    51.     div>
    52.  
    53.     
    54.     <script src="https://cdn.jsdelivr.net/npm/jquery@1.12.4/dist/jquery.min.js">script>
    55.     
    56.     <script src="https://cdn.jsdelivr.net/npm/bootstrap@3.3.7/dist/js/bootstrap.min.js">script>
    57.     <script type="text/javascript">
    58.  
    59.         $(document).ready(function () {
    60.             $('#test').on('click', function () {
    61.                 alert('test');
    62.             });
    63.         });
    64.  
    65.         //调用C#方法后的回调函数：显示电脑信息
    66.         //data为C#方法返回的数据
    67.         function callback(data) {
    68.             data = JSON.parse(data);
    69.             $("#msg").html('');
    70.             $("#msg")
    71.                 .append($("
    72. cpu_id:" + data.cpu_id + "
      73. "))
  • .append($("
  • disk_id:" + data.disk_id + "
    • "))
  • .append($("
  • host_name:" + data.host_name + "
    • "))
  • .append($("
  • networkcard:" + data.networkcard + "
    • "))
  • .append($("
  • serialNumber:" + data.serialNumber + "
    • "))
  • .append($("
  • manufacturer:" + data.manufacturer + "
    • "))
  • .append($("
  • product:" + data.product + "
    • "));
  • };
  • function findComputerInfo() {
  • //调用后台C#FindComputerInfo，返回结果回调方法callback 这里的cefCustomObject2和FrmMain中RegisterJsObject方法的参数是一致的，关联作用
  • cefCustomObject2.findComputerInfo(callback);
  • };
  • script>
  • body>
  • html>

    • 2. 建立HTML界面和c#后台交互的CefCustomObject类

    此处注意javascriptCallback，他是来自HTML的返回值

    1. using CefSharp;
    2. using CefSharp.WinForms;
    3. using Newtonsoft.Json;
    4. using System;
    5. using System.Collections.Generic;
    6. using System.Diagnostics;
    7. using System.Linq;
    8. using System.Text;
    9. using System.Threading.Tasks;
    10. using System.Windows.Forms;
    11.  
    12. namespace cef1
    13. {
    14.     public class CefCustomObject
    15.     {
    16.         // Declare a local instance of chromium and the main form in order to execute things from here in the main thread
    17.         private static ChromiumWebBrowser _instanceBrowser = null;
    18.         // The form class needs to be changed according to yours
    19.         private static Form1 _instanceMainForm = null;
    20.  
    21.  
    22.         public CefCustomObject(ChromiumWebBrowser originalBrowser, Form1 mainForm)
    23.         {
    24.             _instanceBrowser = originalBrowser;
    25.             _instanceMainForm = mainForm;
    26.         }
    27.  
    28.         /// 
    29.         /// 打开调试工具
    30.         /// 
    31.         public void showDevTools()
    32.         {
    33.             _instanceBrowser.ShowDevTools();
    34.         }
    35.  
    36.         /// 
    37.         /// 打开命令行工具
    38.         /// 
    39.         public void opencmd()
    40.         {
    41.             ProcessStartInfo start = new ProcessStartInfo("cmd.exe", "/c pause");
    42.             Process.Start(start);
    43.         }
    44.         public void ok()
    45.         {
    46.             MessageBox.Show("123");
    47.         }
    48.         /// 
    49.         /// 切换网页
    50.         /// 
    51.         public void changePage()
    52.         {
    53.             _instanceBrowser.Load("www.163.com");
    54.         }
    55.  
    56.         /// 
    57.         /// 关闭窗体
    58.         /// 
    59.         public void closeForm()
    60.         {
    61.             try
    62.             {
    63.                 _instanceBrowser.CloseDevTools();
    64.                 _instanceBrowser.GetBrowser().CloseBrowser(true);
    65.             }
    66.             catch { }
    67.  
    68.             try
    69.             {
    70.                 if (_instanceBrowser != null)
    71.                 {
    72.                     _instanceBrowser.Dispose();
    73.                 }
    74.             }
    75.             catch { }
    76.  
    77.             if (!_instanceMainForm.IsDisposed && _instanceMainForm.IsHandleCreated)
    78.             {
    79.                 var result = _instanceMainForm.BeginInvoke(new Action(() =>
    80.                 {
    81.  
    82.                     if (_instanceMainForm != null && !_instanceMainForm.IsDisposed)
    83.                     {
    84.                         _instanceMainForm.Close();
    85.                         _instanceMainForm.Dispose();
    86.                     }
    87.                 }));
    88.                 _instanceMainForm.EndInvoke(result);
    89.             }
    90.  
    91.         }
    92.  
    93.         /// 
    94.         /// 查找电脑信息
    95.         /// 
    96.         /// 
    97.         public void FindComputerInfo(IJavascriptCallback javascriptCallback)
    98.         {
    99.  
    100.             Task.Factory.StartNew(async () =>
    101.             {
    102.  
    103.                 using (javascriptCallback)
    104.                 {
    105.                     Computer computer = new Computer();
    106.                     string response = JsonConvert.SerializeObject(new
    107.                     {
    108.                         cpu_id = computer.CPU_Id,
    109.                         disk_id = computer.Disk_Id,
    110.                         host_name = computer.HostName,
    111.                         networkcard = computer.NetworkCard,
    112.                         serialNumber = computer.SerialNumber_Manufacturer_Product.Item1,
    113.                         manufacturer = computer.SerialNumber_Manufacturer_Product.Item2,
    114.                         product = computer.SerialNumber_Manufacturer_Product.Item3,
    115.                     });
    116.                     await javascriptCallback.ExecuteAsync(response);
    117.                 }
    118.             });
    119.  
    120.         }
    121.  
    122.     }
    123. }

    3.建立访问Computer的类

    1. using System;
    2. using System.Collections.Generic;
    3. using System.Linq;
    4. using System.Management;
    5. using System.Text;
    6. using System.Threading.Tasks;
    7.  
    8. namespace cef1
    9. {
    10.     public class Computer
    11.     {
    12.         /// 
    13.         /// 查找cpu的id
    14.         /// 
    15.         /// 
    16.         public string CPU_Id
    17.         {
    18.             get
    19.             {
    20.                 try
    21.                 {
    22.                     string str = string.Empty;
    23.                     ManagementClass mcCPU = new ManagementClass("win32_Processor");
    24.                     ManagementObjectCollection mocCPU = mcCPU.GetInstances();
    25.                     foreach (ManagementObject m in mocCPU)
    26.                     {
    27.                         str = m["Processorid"].ToString().Trim().Substring(0, 8);
    28.                         break;
    29.                     }
    30.                     return str;
    31.                 }
    32.                 catch (Exception)
    33.                 {
    34.                     return string.Empty;
    35.                 }
    36.             }
    37.         }
    38.         public string Disk_Id
    39.         {
    40.             get
    41.             {
    42.                 try
    43.                 {
    44.                     string hdId = string.Empty;
    45.                     ManagementClass hardDisk = new ManagementClass("win32_DiskDrive");
    46.                     ManagementObjectCollection hardDiskC = hardDisk.GetInstances();
    47.                     foreach (ManagementObject m in hardDiskC)
    48.                     {
    49.                         hdId = m.Properties["Model"].Value.ToString();
    50.                         break;
    51.                     }
    52.                     return hdId;
    53.                 }
    54.                 catch (Exception)
    55.                 {
    56.  
    57.                     return string.Empty;
    58.                 }
    59.             }
    60.         }
    61.         /// 
    62.         /// 网卡
    63.         /// 
    64.         public string NetworkCard
    65.         {
    66.             get
    67.             {
    68.                 try
    69.                 {
    70.                     string MoAddress = string.Empty;
    71.                     ManagementClass networkAdapter = new ManagementClass("Win32_NetworkAdapterConfiguration");
    72.                     ManagementObjectCollection adapterC = networkAdapter.GetInstances();
    73.                     foreach (ManagementObject m in adapterC)
    74.                     {
    75.                         if ((bool)m["IPEnabled"] == true)
    76.                         {
    77.                             MoAddress = m["MacAddress"].ToString().Trim();
    78.                             m.Dispose();
    79.                         }
    80.                     }
    81.                     return MoAddress;
    82.                 }
    83.                 catch
    84.                 {
    85.                     return string.Empty;
    86.                 }
    87.             }
    88.         }
    89.         /// 
    90.         /// 获取序列号，制造商，型号
    91.         /// 
    92.         public Tuple<string, string, string> SerialNumber_Manufacturer_Product
    93.         {
    94.             get
    95.             {
    96.                 try
    97.                 {
    98.                     Tuple<string, string, string> tuple = null; new Tuple<string, string, string>(string.Empty, string.Empty, string.Empty);
    99.                     ManagementObjectSearcher mos = new ManagementObjectSearcher("select * from Win32_baseboard");
    100.  
    101.  
    102.                     foreach (ManagementObject m in mos.Get())
    103.                     {
    104.                         tuple = new Tuple<string, string, string>(m["SerialNumber"].ToString(), m["Manufacturer"].ToString(), m["Product"].ToString());
    105.                     }
    106.                     return tuple;
    107.                 }
    108.                 catch (Exception)
    109.                 {
    110.  
    111.                     return null;
    112.                 }
    113.             }
    114.         }
    115.         /// 
    116.         /// 计算机名称
    117.         /// 
    118.         public string HostName
    119.         {
    120.             get
    121.             {
    122.                 return System.Net.Dns.GetHostName();
    123.             }
    124.         }
    125.     }
    126. }

    4.建立右键屏蔽按钮MenuHandler的类

    1. using CefSharp;
    2. using System;
    3. using System.Collections.Generic;
    4. using System.Linq;
    5. using System.Text;
    6. using System.Threading.Tasks;
    7.  
    8. namespace cef1
    9. {
    10.     /// 
    11.     /// 屏蔽右键菜单
    12.     /// 
    13.     public class MenuHandler : IContextMenuHandler
    14.     {
    15.         void CefSharp.IContextMenuHandler.OnBeforeContextMenu(CefSharp.IWebBrowser browserControl, CefSharp.IBrowser browser, CefSharp.IFrame frame, CefSharp.IContextMenuParams parameters, CefSharp.IMenuModel model)
    16.         {
    17.             model.Clear();
    18.         }
    19.  
    20.         bool CefSharp.IContextMenuHandler.OnContextMenuCommand(CefSharp.IWebBrowser browserControl, CefSharp.IBrowser browser, CefSharp.IFrame frame, CefSharp.IContextMenuParams parameters, CefSharp.CefMenuCommand commandId, CefSharp.CefEventFlags eventFlags)
    21.         {
    22.             //throw new NotImplementedException();
    23.             return false;
    24.         }
    25.  
    26.         void CefSharp.IContextMenuHandler.OnContextMenuDismissed(CefSharp.IWebBrowser browserControl, CefSharp.IBrowser browser, CefSharp.IFrame frame)
    27.         {
    28.             //throw new NotImplementedException();
    29.         }
    30.  
    31.         bool CefSharp.IContextMenuHandler.RunContextMenu(CefSharp.IWebBrowser browserControl, CefSharp.IBrowser browser, CefSharp.IFrame frame, CefSharp.IContextMenuParams parameters, CefSharp.IMenuModel model, CefSharp.IRunContextMenuCallback callback)
    32.         {
    33.             return false;
    34.         }
    35.     }
    36. }

    5.主界面的代码

    1. using CefSharp;
    2. using CefSharp.WinForms;
    3. using System;
    4. using System.Collections.Generic;
    5. using System.ComponentModel;
    6. using System.Data;
    7. using System.Drawing;
    8. using System.IO;
    9. using System.Linq;
    10. using System.Text;
    11. using System.Threading.Tasks;
    12. using System.Windows.Forms;
    13.  
    14. namespace cef1
    15. {
    16.     public partial class Form1 : Form
    17.     {
    18.         private ChromiumWebBrowser chromeBrowser;
    19.         public Form1()
    20.         {
    21.             InitializeComponent();
    22.             InitializeChromium();//初始化
    23.         }
    24.  
    25.         private void Form1_Load(object sender, EventArgs e)
    26.         {
    27.             
    28.         }
    29.  
    30.         public void InitializeChromium()
    31.         {
    32.             string indexpage = string.Format(@"{0}\html\html\index.html", Application.StartupPath);
    33.             if (!File.Exists(indexpage))
    34.             {
    35.                 MessageBox.Show("程序将要退出，本地网页文件不错在：" + indexpage);
    36.                 return;
    37.             }
    38.  
    39.             CefSettings settings = new CefSettings();
    40.  
    41.             //Example of setting a command line argument
    42.             //Enables WebRTC
    43.             settings.CefCommandLineArgs.Add("enable-media-stream", "1");
    44.  
    45.             settings.CefCommandLineArgs.Add("no-proxy-server", "1");
    46.             settings.CefCommandLineArgs.Add("proxy-server", "ProxyAddress");
    47.             settings.CachePath = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData), "CefSharp\\Cache");
    48.  
    49.             Cef.Initialize(settings, performDependencyCheck: true, browserProcessHandler: null);
    50.  
    51.             chromeBrowser = new ChromiumWebBrowser(indexpage);
    52.             this.Controls.Add(chromeBrowser);
    53.             chromeBrowser.Dock = DockStyle.Fill;
    54.             chromeBrowser.MenuHandler = new MenuHandler();
    55.             BrowserSettings browserSettings = new BrowserSettings();
    56.             browserSettings.FileAccessFromFileUrls = CefState.Enabled;
    57.             browserSettings.UniversalAccessFromFileUrls = CefState.Enabled;
    58.             chromeBrowser.BrowserSettings = browserSettings;
    59.  
    60.             CefSharpSettings.LegacyJavascriptBindingEnabled = true;
    61.             //在浏览器中注册一个javascript对象
    62.             //BingdingOptions:Cefsharp版本必须大于63，否则会报错
    63.             chromeBrowser.RegisterJsObject("cefCustomObject2", new CefCustomObject(chromeBrowser, this)); //cefCustomObject2和CefCustomObject关联上
    64.         }
    65.  
    66.         private void Form1_FormClosing(object sender, FormClosingEventArgs e)
    67.         {
    68.             Cef.Shutdown();
    69.         }
    70.     }
    71. }

     6.效果

    拓展

    如果把cefsharp的版本换成83.4.20时，会有如下报错

    根据提示打开对应的网址，之前的方法已经弃用了，需要使用新的方法。

    只需要把下面的方法

    chromeBrowser.RegisterJsObject("cefCustomObject2", new CefCustomObject(chromeBrowser, this)); //cefCustomObject2和CefCustomObject关联上

    替换成即可

    1.  CefSharpSettings.LegacyJavascriptBindingEnabled = true;
    2.  CefSharpSettings.WcfEnabled = true;
    3.  chromeBrowser.JavascriptObjectRepository.Register("cefCustomObject2", new CefCustomObject(chromeBrowser, this), isAsync: false, options: BindingOptions.DefaultBinder);

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  • 原文地址：https://blog.csdn.net/u012563853/article/details/126075821