c# webview2获取网页HTML的绝招

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;
 
namespace vsphere
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
 
        private void button1_Click(object sender, EventArgs e)
        {
            this.webView21.Source = new System.Uri(textBox1.Text, System.UriKind.Absolute);
        }
        private async void webView21_NavigationCompleted(object sender, Microsoft.Web.WebView2.Core.CoreWebView2NavigationCompletedEventArgs e)
        {
 
            object obj = await webView21.CoreWebView2.ExecuteScriptAsync("document.body.innerHTML");//第一次获取没法获取后端的数据
            textBox2.Text = obj.ToString();
        }
 
        private async void button2_Click(object sender, EventArgs e)
        {
            object obj = await webView21.CoreWebView2.ExecuteScriptAsync("document.body.innerHTML");//等一会儿获取HTML就能看到后端数据了
            textBox2.Text = obj.ToString();
        }
 
 
 
        private async void button3_Click(object sender, EventArgs e)
        {
            object obj = await webView21.CoreWebView2.ExecuteScriptAsync("document.body.innerText");//获取页面的文本
            textBox2.Text = obj.ToString();
        }
 
        private async void button4_Click(object sender, EventArgs e)
        {
            object obj = await webView21.CoreWebView2.ExecuteScriptAsync("$('.f3')[0].innerHTML");//jquery获取页面内容
            textBox2.Text = obj.ToString();
        }
    }
}

 

webView2 获取网页源代码

         private async void fManual_Load(object sender, EventArgs e)
        {
            if (webView21.CoreWebView2 == null)
            {
               await webView21.EnsureCoreWebView2Async();
                webView21.CoreWebView2.Settings.UserAgent = "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/98.0.4758.102 Safari/537.36 Edg/98.0.1108.56";
            }
            TextTool.Log(DateTime.Now + "  开始导航到" + url);
            webView21.Source = new Uri(url);
}
       private  void webView21_DocumentCompleted(object sender, CoreWebView2NavigationCompletedEventArgs e)
        {
            var url = webView21.CoreWebView2.Source;
            var task = Task.Run(() =>
            {
                Thread.Sleep(2000); 
            });
            task.GetAwaiter().OnCompleted(async () =>
            {
                var html = await webView21.CoreWebView2.ExecuteScriptAsync("document.getElementsByTagName('html')[0].outerHTML"); //第一次获取没法获取后端的数据
                 html = Unicode2String(html);
                 var obj = $"{{\"html\":{html}}}";
                 var b = JsonConvert.DeserializeObject<Doc>(obj);
                File.WriteAllText("1.html", b.html);
            });
}
        /// <summary>
        /// Unicode转字符串
        /// </summary>
        /// <param name="source">经过Unicode编码的字符串</param>
        /// <returns>正常字符串</returns>
         static string Unicode2String(string source)
        {
            return new Regex(@"\\u([0-9A-F]{4})", RegexOptions.IgnoreCase | RegexOptions.Compiled).Replace(source,
                x => Convert.ToChar(Convert.ToUInt16(x.Result("$1"), 16)).ToString());
        }