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();
        }
    }
}