C#使用CefSharp和网页进行自动化交互的示例代码_C#

这里以winfroms为例

1.先安装对应的包，我目前用的最新版本。

cefsharp.winforms 版本126.2.70.0

2.nuget安装完成后，直接使用

2.1、初始化

        public cefsharp.winforms.chromiumwebbrowser chromebrowser;
        public void initializechromium()
        {
            cefsettings settings = new cefsettings();
            settings.locale = "zh-cn";
            cef.initialize(settings);
            chromebrowser = new chromiumwebbrowser("https://www.sporttery.cn/jc/jsq/zqspf/");
            chromebrowser.javascriptobjectrepository.settings.legacybindingenabled = true;
            //cefsharpsettings.wcfenabled = true;
            // 添加你的c#类为可由javascript调用
            chromebrowser.javascriptobjectrepository.register("bridge", new jstocsharpbridge(), false, bindingoptions.defaultbinder);

            // 添加事件处理器以监听页面加载结束
            chromebrowser.frameloadend += onbrowserframeloadend;
            //添加控件
            this.controls.add(chromebrowser);
            this.chromebrowser.dock = dockstyle.fill;
            chromebrowser.keyboardhandler = new cefkeyboardhander();

        }

2.2、如果你需要在网页加载好后，就注入js事件，可以写在onbrowserframeloadend中

 private  void onbrowserframeloadend(object sender, frameloadendeventargs e)
 {
     if (e.frame.ismain)
     {
         // 注入javascript以添加点击事件
         string script = @"
             (function() {
                 var btn = document.queryselector('#detailbtn');
                 if (btn) {
                     btn.addeventlistener('click', function() {
                      settimeout(function() {
                                  var result1 = document.queryselector('#viewdetailtbl > tr:nth-child(1) > td:nth-child(2)').textcontent
                                  console.log(111); 
                                  console.log(result1); 

                                  bridge.callcsharpfunction(result1);



                             }, 500); // 等待1秒
                        

                     });
                 }
             })();
         "; 
         e.frame.executejavascriptasync(script);


     }
 }

这里意思是页面加载完成后，给页面中的按钮注入一个点击事件。其中executejavascriptasync用于注入js,这个是没有返回值的。

2.3、接下来我们看看如何注入js到网页中，并且带返回值。

        private async void button1_click(object sender, eventargs e)
        {

            var js = @"
                    (() => {
                 
                      var week1 = document.queryselector('#list_1025933 > td:nth-child(1)').textcontent
                      var lname1 = document.queryselector('#list_1025933 > td.lname > a').text
                      var vstd1 = document.queryselector('#list_1025933 > td.vstd').textcontent
                      var win1 = document.queryselector('#list_1025933 > td:nth-child(6) > div.hadodds.bline > span:nth-child(1)').textcontent
                      var week2 = document.queryselector('#list_1025934 > td:nth-child(1)').textcontent
                      var lname2 = document.queryselector('#list_1025934 > td.lname > a').text
                      var vstd2 = document.queryselector('#list_1025934 > td.vstd').textcontent
                      var flat = document.queryselector('#list_1025934 > td:nth-child(6) > div.hadodds.bline > span:nth-child(2)').textcontent
                        var times = document.queryselector('#times').value;
                        var consume = document.queryselector('#consume').textcontent;
                        var bonus = document.queryselector('#bonus').textcontent;
                        return {week1,lname1,vstd1,win1,week2,lname2,vstd2,flat,times, consume, bonus };
                    })();
                ";

            dynamic result = await chromebrowser.evaluatescriptasync(js);

            // 访问返回的json对象的属性

           // string result1 = result.result.result1;
            string times = result.result.times;
            string consume = result.result.consume;
            string bonus = result.result.bonus;

            // 使用返回的数据
            messagebox.show($"{result.result.week1}{result.result.lname1}{result.result.vstd1} 胜{result.result.win1}\n{result.result.week2}{result.result.lname2}{result.result.vstd2} 平{result.result.flat}\n{result1}  \n倍率: {times} 投注: {consume} 理论最高奖金: {bonus}");
        }

这里就是点击winfrom中的按钮，然后注入js，js执行后把js的结果返回给c#。

2.4、接着我们看看如何通过js调用c#中的函数

        public class jstocsharpbridge
        {
            public void callcsharpfunction(string message)
            {

                // 在这里调用你自己的c#函数
                result1 = message;
            }
        }
        static string result1 = string.empty;

首先我们要定义js调用的方法，这里单独写一个类，然后需要在初始化的时候注入这个类

 chromebrowser.javascriptobjectrepository.settings.legacybindingenabled = true;
            //cefsharpsettings.wcfenabled = true;
            // 添加你的c#类为可由javascript调用
            chromebrowser.javascriptobjectrepository.register("bridge", new jstocsharpbridge(), false, bindingoptions.defaultbinder);

只有注入了，才能被js代码识别，然后调用。
bridge.callcsharpfunction(result1);这个就是调用方式。这句话在页面加载后，注入点击事件中有写到。

2.5、开启调试模式

        public class cefkeyboardhander : ikeyboardhandler
        {
            public bool onkeyevent(iwebbrowser browsercontrol, ibrowser browser, keytype type, int windowskeycode, int nativekeycode, cefeventflags modifiers, bool issystemkey)
            {
                if (type == keytype.keyup && enum.isdefined(typeof(keys), windowskeycode))
                {
                    var key = (keys)windowskeycode;
                    switch (key)
                    {
                        case keys.f12:
                            browser.showdevtools();
                            break;

                        case keys.f5:

                            if (modifiers == cefeventflags.controldown)
                            {
                                //messagebox.show("ctrl+f5");
                                browser.reload(true); //强制忽略缓存

                            }
                            else
                            {
                                //messagebox.show("f5");
                                browser.reload();
                            }
                            break;


                    }
                }
                return false;
            }

            public bool onprekeyevent(iwebbrowser browsercontrol, ibrowser browser, keytype type, int windowskeycode, int nativekeycode, cefeventflags modifiers, bool issystemkey, ref bool iskeyboardshortcut)
            {
                return false;
            }
        }

初始化的时候添加：
chromebrowser.keyboardhandler = new cefkeyboardhander();这样就可以在winfrom中按f12进行调试

记得关闭窗体的时候，关掉cef引擎

       private void form1_formclosing(object sender, formclosingeventargs e)
       {
           cef.shutdown();
          //chromebrowser.closedevtools();
       }

接着给出所有代码：

using cefsharp.winforms;
using system;
using system.windows.forms;

namespace cefsharp.demo
{
    


    public partial class form1 : form
    {
        public class jstocsharpbridge
        {
            public void callcsharpfunction(string message)
            {

                // 在这里调用你自己的c#函数
                result1 = message;
            }
        }
        static string result1 = string.empty;
        public form1()
        {
            initializecomponent();
            initializechromium();
        }

        private void form1_load(object sender, eventargs e)
        {
  

        }

        public cefsharp.winforms.chromiumwebbrowser chromebrowser;
        public void initializechromium()
        {
            cefsettings settings = new cefsettings();
            settings.locale = "zh-cn";
            cef.initialize(settings);
            chromebrowser = new chromiumwebbrowser("https://www.sporttery.cn/jc/jsq/zqspf/");
            chromebrowser.javascriptobjectrepository.settings.legacybindingenabled = true;
            //cefsharpsettings.wcfenabled = true;
            // 添加你的c#类为可由javascript调用
            chromebrowser.javascriptobjectrepository.register("bridge", new jstocsharpbridge(), false, bindingoptions.defaultbinder);

            // 添加事件处理器以监听页面加载结束
            chromebrowser.frameloadend += onbrowserframeloadend;
            //添加控件
            this.controls.add(chromebrowser);
            this.chromebrowser.dock = dockstyle.fill;
            chromebrowser.keyboardhandler = new cefkeyboardhander();

        }

        private  void onbrowserframeloadend(object sender, frameloadendeventargs e)
        {
            if (e.frame.ismain)
            {
                // 注入javascript以添加点击事件
                string script = @"
                    (function() {
                        var btn = document.queryselector('#detailbtn');
                        if (btn) {
                            btn.addeventlistener('click', function() {
                             settimeout(function() {
                                         var result1 = document.queryselector('#viewdetailtbl > tr:nth-child(1) > td:nth-child(2)').textcontent
                                         console.log(111); 
                                         console.log(result1); 

                                         bridge.callcsharpfunction(result1);



                                    }, 500); // 等待1秒
                               

                            });
                        }
                    })();
                "; 
                e.frame.executejavascriptasync(script);


            }
        }

        private void form1_formclosing(object sender, formclosingeventargs e)
        {
            cef.shutdown();
           //chromebrowser.closedevtools();
        }

        public class cefkeyboardhander : ikeyboardhandler
        {
            public bool onkeyevent(iwebbrowser browsercontrol, ibrowser browser, keytype type, int windowskeycode, int nativekeycode, cefeventflags modifiers, bool issystemkey)
            {
                if (type == keytype.keyup && enum.isdefined(typeof(keys), windowskeycode))
                {
                    var key = (keys)windowskeycode;
                    switch (key)
                    {
                        case keys.f12:
                            browser.showdevtools();
                            break;

                        case keys.f5:

                            if (modifiers == cefeventflags.controldown)
                            {
                                //messagebox.show("ctrl+f5");
                                browser.reload(true); //强制忽略缓存

                            }
                            else
                            {
                                //messagebox.show("f5");
                                browser.reload();
                            }
                            break;


                    }
                }
                return false;
            }

            public bool onprekeyevent(iwebbrowser browsercontrol, ibrowser browser, keytype type, int windowskeycode, int nativekeycode, cefeventflags modifiers, bool issystemkey, ref bool iskeyboardshortcut)
            {
                return false;
            }
        }

        private async void button1_click(object sender, eventargs e)
        {

            var js = @"
                    (() => {
                 
                      var week1 = document.queryselector('#list_1025933 > td:nth-child(1)').textcontent
                      var lname1 = document.queryselector('#list_1025933 > td.lname > a').text
                      var vstd1 = document.queryselector('#list_1025933 > td.vstd').textcontent
                      var win1 = document.queryselector('#list_1025933 > td:nth-child(6) > div.hadodds.bline > span:nth-child(1)').textcontent
                      var week2 = document.queryselector('#list_1025934 > td:nth-child(1)').textcontent
                      var lname2 = document.queryselector('#list_1025934 > td.lname > a').text
                      var vstd2 = document.queryselector('#list_1025934 > td.vstd').textcontent
                      var flat = document.queryselector('#list_1025934 > td:nth-child(6) > div.hadodds.bline > span:nth-child(2)').textcontent
                        var times = document.queryselector('#times').value;
                        var consume = document.queryselector('#consume').textcontent;
                        var bonus = document.queryselector('#bonus').textcontent;
                        return {week1,lname1,vstd1,win1,week2,lname2,vstd2,flat,times, consume, bonus };
                    })();
                ";

            dynamic result = await chromebrowser.evaluatescriptasync(js);

            // 访问返回的json对象的属性

           // string result1 = result.result.result1;
            string times = result.result.times;
            string consume = result.result.consume;
            string bonus = result.result.bonus;

            // 使用返回的数据
            messagebox.show($"{result.result.week1}{result.result.lname1}{result.result.vstd1} 胜{result.result.win1}\n{result.result.week2}{result.result.lname2}{result.result.vstd2} 平{result.result.flat}\n{result1}  \n倍率: {times} 投注: {consume} 理论最高奖金: {bonus}");
        }
    }
}

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C#使用CefSharp和网页进行自动化交互的示例代码

2024年09月08日 • C# •我要评论

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