C# webview2 获取cookie

你可以使用以下的代码来获取 WebView2 中的 Cookie：

using Microsoft.Web.WebView2.Core;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Windows.ApplicationModel.Core;
using Windows.UI.Core;

namespace WebView2Cookie
{
    public class WebView2CookieHelper
    {
        public async Task<string> GetCookie(string url)
        {
            string cookie = string.Empty;

            await CoreApplication.MainView.CoreWindow.Dispatcher.RunAsync(CoreDispatcherPriority.Normal, async () =>
            {
                await CoreWebView2Environment.CreateAsync();
                var webView = new WebView2();
                await webView.EnsureCoreWebView2Async();

                webView.NavigationStarting += async (s, e) =>
                {
                    var cookieManager = webView.CoreWebView2.CookieManager;

                    var uri = new Uri(url);
                    var cookies = await cookieManager.GetCookiesAsync(uri.ToString());
                    cookie = string.Join(";", cookies.Select(c => $"{c.Name}={c.Value}"));
                };

                await webView.CoreWebView2.Navigate(url);
            });

            return cookie;
        }
    }
}

使用时，只需要传入你需要获取 Cookie 的 URL，例如：

var helper = new WebView2CookieHelper();
var cookie = await helper.GetCookie("https://www.example.com");

其中，`cookie` 即为获取到的 Cookie。