从网站解析和编辑HTML的快速方法

问题描述

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 System.Net;
using System.IO;

namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        private String webText;

        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            WebClient web = new WebClient();
            System.IO.Stream stream = web.OpenRead("https://de.wikipedia.org");
            using (System.IO.StreamReader reader = new System.IO.StreamReader(stream))
            {
                webText = reader.ReadToEnd();
            }
            stream.Close();

            richTextBox1.Text = webText;
            }
    }
}

我尝试了什么：



此代码可以很好地显示整个源代码。



但是我想去使用getElementById函数通过源代码。

显然这个函数仅限于htmlDocument类型，我无法找到一种方法将我从流中返回的字符串转换为htmlDocument。



有没有办法从字符串转换成htmlDocument？

或者不是将源代码写入字符串，我可以在第一时间创建一个htmlDocument吗？



谢谢

What I have tried:

This Code is working quite well to display the whole sourcecode.

But i would like to go through the sourcecode using the getElementById function.
Apparently this function is limited to htmlDocument types and i couldnt find a way to convert the string i get back from my stream into a htmlDocument.

Is there a way to convert into htmlDocument from string?
Or instead of writing the sourcecode into a string, can i create a htmlDocument in the first place?

Thanks

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