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WinForm CefSharp 笔记一(入门篇)

开发技术 开发技术 3小时前 1次浏览

简介

CefSharp简单来说就是一款.Net编写的浏览器包,方便你在Winform和WPF中内嵌的Chrome浏览器组件。

资源

GitHub地址:传送门
wiki帮助文档地址:传送门
CefSharp最小的示例工程:传送门
gitter交流讨论区:传送门

快速入门

本文使用版本cefsharp/71

要求

  • Visual Studio with NuGet Package Manager (>=2010).
  • CefSharp45.0 和更新的版本,需要安装 VC 2013 Redistributable Package x86
  • 更早的版本需要安装VC 2012 Redistributable Package x86
  • .Net Framework4.5.2

安装

这块安装使用没有想象的那么简单,比较坑爹,各种修改配置,按照官网的A配置方案没有搞定,按照B配置方案勉强部署成功(VS2013/VS2017)!对于外文不好的我,看着英文文档脑壳疼。老外给的闭坑指南,但是感觉没有啥卵用。下面就介绍一下B方案安装部署的过程吧,A方案我就不讲了,想看的请去上面的官网查看。

简略测试部署过程

整个工程可在GitHub下载:传送门

  • 创建工程Test.App(Winform工程),将其中的Form1窗体删掉。
  • 创建工程Test.Chrome(类库)。
  • 在Test.Chrome工程添加NuGet引用,搜索CefSharp,选择CefSharp.Winforms。
  • 在解决方案上点配置管理器,将平台设置为x86或x64.
  • 在Test.Chrome工程添加Form1窗体,添加CefSharp窗体相关的代码。
  • Test.App添加Test.Chrome工程的引用,修改Program.cs文件,引用Test.Chrome工程的Form1窗体。

部署过程细节截图

  1. 创建一个基础的Winform应用,并使用NuGet引用CefSharp包。使用Nuget添加引用,搜索CefSharp,添加CefSharp.WinForm,CefSharp.Winform依赖好几个包,这块选择这一个安装就可以了,NuGet会自动帮你把其他依赖的包一并下载好的。
    WinForm CefSharp 笔记一(入门篇)
    安装完你本地的Packages文件夹里有如下文件:
    WinForm CefSharp 笔记一(入门篇)
    官方文档建议:安装完NuGet包之后,关闭vs然后重新打开,避免VS自带的智能感知引用有问题
    WinForm CefSharp 笔记一(入门篇)
  2. 在简介方案上右键—》选择配置管理—》修改目标平台为x86或x64
    WinForm CefSharp 笔记一(入门篇)
    选择x86或x64
    WinForm CefSharp 笔记一(入门篇)
  3. 在你的窗体Form1窗体里添加相应代码,参考Using CEF (as Browser)中的代码。

Using CEF (as Browser)

在代码中引用相应的dll

using CefSharp;
using CefSharp.WinForms;
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完整示例:

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using CefSharp;
using CefSharp.WinForms;

namespace embebbedChromium
{
    public partial class Form1 : Form
    {
        public ChromiumWebBrowser chromeBrowser;
 
        public Form1()
        {
            InitializeComponent();
            // Start the browser after initialize global component
            InitializeChromium();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            
        }

		//初始化浏览器并启动
        public void InitializeChromium()
        {
            CefSettings settings = new CefSettings();
            // Initialize cef with the provided settings
            Cef.Initialize(settings);
            // Create a browser component
            chromeBrowser = new ChromiumWebBrowser("https://www.baidu.com");
            // Add it to the form and fill it to the form window.
            this.Controls.Add(chromeBrowser);
            chromeBrowser.Dock = DockStyle.Fill;
        }
		
		//窗体关闭时,记得停止浏览器
        private void Form1_FormClosing(object sender, FormClosingEventArgs e)
        {
            Cef.Shutdown();
        }        
    }
}

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WinForm CefSharp 笔记一(入门篇)

3.2. Using CEF (as User Interface)

这块参考官方文档:传送门,做了部分内容的完善,这块我理解的就是提供了一个js调用C#类方法的一个示例。

  1. 下载Bootstrap相关的文件,传送门
    WinForm CefSharp 笔记一(入门篇)

  2. 将下载好的Bootstrap文件夹复制拷贝到你的VS项目中,并添加html文件夹,在里面新建一个index.html文件,具体如下图所示:
    WinForm CefSharp 笔记一(入门篇)
    html文件内容参考这里:传送门,网页下方有示例,也有模板可以下载。

    <!DOCTYPE html>
    <html lang="en">
      <head>
        <meta charset="utf-8">
        <meta http-equiv="X-UA-Compatible" content="IE=edge">
        <meta name="viewport" content="width=device-width, initial-scale=1">
        <!-- The above 3 meta tags *must* come first in the head; any other head content must come *after* these tags -->
        <title>Bootstrap 101 Template</title>
    
        <!-- Bootstrap -->
        <link href="css/bootstrap.min.css" rel="stylesheet">
    
        <!-- HTML5 shim and Respond.js for IE8 support of HTML5 elements and media queries -->
        <!-- WARNING: Respond.js doesn't work if you view the page via file:// -->
        <!--[if lt IE 9]>
          <script src="https://oss.maxcdn.com/html5shiv/3.7.3/html5shiv.min.js"></script>
          <script src="https://oss.maxcdn.com/respond/1.4.2/respond.min.js"></script>
        <![endif]-->
      </head>
      <body>
        <h1>Hello, world!</h1>
    
        <!-- jQuery (necessary for Bootstrap's JavaScript plugins) -->
        <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>
        <!-- Include all compiled plugins (below), or include individual files as needed -->
        <script src="js/bootstrap.min.js"></script>
      </body>
    </html>
    
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  3. 将上面的css、fonts、html、js文件夹里的文件全部选中—》然后点击鼠标右键,选中属性—》设置始终复制

  4. 新建一个类CefCustomObject,用来让js调用C#中类的方法,具体代码如下:

    using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Text;
    using System.Threading.Tasks;
    using System.Windows.Forms;
    using CefSharp;
    using CefSharp.WinForms;
    using System.Diagnostics;
    
    namespace embebbedChromium
    {
        class CefCustomObject
        {
            // Declare a local instance of chromium and the main form in order to execute things from here in the main thread
            private static ChromiumWebBrowser _instanceBrowser = null;
            // The form class needs to be changed according to yours
            private static Form1 _instanceMainForm = null;
    
    
            public CefCustomObject(ChromiumWebBrowser originalBrowser, Form1 mainForm)
            {
                _instanceBrowser = originalBrowser;
                _instanceMainForm = mainForm;
            }
    
            public void showDevTools()
            {
                _instanceBrowser.ShowDevTools();
            }
    
            public void opencmd()
            {
                ProcessStartInfo start = new ProcessStartInfo("cmd.exe", "/c pause");
                Process.Start(start);
            }
        }
    }
    
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  5. 修改Form1窗体的代码

    using System;
    using System.IO;
    using System.Collections.Generic;
    using System.ComponentModel;
    using System.Data;
    using System.Drawing;
    using System.Linq;
    using System.Text;
    using System.Threading.Tasks;
    using System.Windows.Forms;
    using CefSharp;
    using CefSharp.WinForms;
    using System.Runtime.InteropServices;
    
    namespace embebbedChromium
    {
        public partial class Form1 : Form
        {
            public ChromiumWebBrowser chromeBrowser;
    
            public Form1()
            {
                InitializeComponent();
                // Start the browser after initialize global component
                InitializeChromium();
                //需要添加此句代码,否则下面执行会报错
    			CefSharpSettings.LegacyJavascriptBindingEnabled = true;	            
                // Register an object in javascript named "cefCustomObject" with function of the CefCustomObject class :3
                chromeBrowser.RegisterJsObject("cefCustomObject", new CefCustomObject(chromeBrowser, this));
            }
    
            private void Form1_Load(object sender, EventArgs e)
            {
            	//此句代码执行有错,官网示例的跑不起来
                //chromeBrowser.ShowDevTools();
            }
    
            public void InitializeChromium()
            {
                CefSettings settings = new CefSettings();
    
                // Note that if you get an error or a white screen, you may be doing something wrong !
                // Try to load a local file that you're sure that exists and give the complete path instead to test
                // for example, replace page with a direct path instead :
                // String page = @"C:UsersSDkCarlosDesktopafolderindex.html";
    
                String page = string.Format(@"{0}html-resourceshtmlindex.html", Application.StartupPath);
                //String page = @"C:UsersSDkCarlosDesktopartyom-HOMEPAGEindex.html";
    
                if (!File.Exists(page))
                {
                    MessageBox.Show("Error The html file doesn't exists : "+page);
                }
                
                // Initialize cef with the provided settings
                Cef.Initialize(settings);
                // Create a browser component
                chromeBrowser = new ChromiumWebBrowser(page);
                   
                // Add it to the form and fill it to the form window.
                this.Controls.Add(chromeBrowser);
                chromeBrowser.Dock = DockStyle.Fill;
                
                // Allow the use of local resources in the browser
                BrowserSettings browserSettings = new BrowserSettings();
                browserSettings.FileAccessFromFileUrls = CefState.Enabled;
                browserSettings.UniversalAccessFromFileUrls = CefState.Enabled;
                chromeBrowser.BrowserSettings = browserSettings;
            }
    
            private void Form1_FormClosing(object sender, FormClosingEventArgs e)
            {
                Cef.Shutdown();
            }
        }
    }
    
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    1. 运行查看效果,如下图所示
      WinForm CefSharp 笔记一(入门篇)

 


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