在WebBrowser控件(C#/ .NET)中设置TextArea的值

using System;
using System.Windows.Forms;

namespace WebBrowserTextAreaExample
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();

            webBrowser.DocumentCompleted += WebBrowser_DocumentCompleted;
            webBrowser.Navigate("http://example.com/mypage.html");
        }

        private void WebBrowser_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
        {
            HtmlElement textAreaElement = webBrowser.Document.GetElementById("myTextArea");
            textAreaElement.InnerText = "这是一个示例文本";
        }
    }
}