WebView2 控件（基于 Microsoft Edge (Chromium) 的嵌入式浏览器控件），保存资源(图片、脚本、CSS)

await webView.EnsureCoreWebView2Async();

// 订阅Web资源请求事件
webView.CoreWebView2.WebResourceRequested += (sender, args) => 
{
    string url = args.Request.Uri;
    string method = args.Request.Method;
    
    // 获取资源类型（通过Content-Type或文件扩展名）
    string resourceType = "Unknown";
    if (args.Response != null)
    {
        string contentType = args.Response.Headers.GetHeader("Content-Type")?.ToLower();
        
        if (contentType.Contains("text/css")) resourceType = "CSS";
        else if (contentType.Contains("javascript")) resourceType = "JS";
        else if (contentType.Contains("image/")) resourceType = "Image";
        // 其他类型判断...
    }
    
    // 输出资源信息
    Debug.WriteLine($"Resource: {url}, Type: {resourceType}, Method: {method}");
    
    // 保存文件，文件名称需自行处理
    string fileName = Guid.NewGuid().ToString();
    File.WriteAllBytes($"{fileName}", SteamHelper.StreamToBytes(content));
};

    public class SteamHelper
    {
        /// <summary>
        /// 将 Stream 转成 byte[]
        /// </summary>
        public static byte[] StreamToBytes(Stream stream)
        {
            byte[] bytes = new byte[stream.Length];
            stream.Read(bytes, 0, bytes.Length);
            // 设置当前流的位置为流的开始 
            stream.Seek(0, SeekOrigin.Begin);
            return bytes;
        }

        /// 将 byte[] 转成 Stream
        public static Stream BytesToStream(byte[] bytes)
        {
            Stream stream = new MemoryStream(bytes);
            return stream;
        }

        //四.Stream 和 文件之间的转换
        /// <summary>
        /// 将 Stream 写入文件
        /// </summary>
        /// <param name="stream"></param>
        /// <param name="fileName"></param>
        public static void StreamToFile(Stream stream, string fileName)
        {
            // 把 Stream 转换成 byte[] 
            byte[] bytes = new byte[stream.Length];
            stream.Read(bytes, 0, bytes.Length);

            // 设置当前流的位置为流的开始 
            stream.Seek(0, SeekOrigin.Begin);

            // 把 byte[] 写入文件 
            FileStream fs = new FileStream(fileName, FileMode.Create);
            BinaryWriter bw = new BinaryWriter(fs);
            bw.Write(bytes);
            bw.Close();
            fs.Close();
        }

        /// <summary>
        /// 五.从文件读取 Stream
        /// </summary>
        /// <param name="fileName"></param>
        /// <returns></returns>
        public static Stream FileToStream(string fileName)
        {
            // 打开文件 
            FileStream fileStream = new FileStream(fileName, FileMode.Open, FileAccess.Read, FileShare.Read);

            // 读取文件的 byte[] 
            byte[] bytes = new byte[fileStream.Length];
            fileStream.Read(bytes, 0, bytes.Length);
            fileStream.Close();

            // 把 byte[] 转换成 Stream 
            Stream stream = new MemoryStream(bytes);
            return stream;
        }
    }