下载图片

 /// <summary>
        /// 下载图片
        /// </summary>
        /// <param name="url"></param>
        /// <returns></returns>
        public static Bitmap DownloadImg(string url)
        {
            Uri uri = new Uri(url.Replace("\\", "/"));
            WebRequest request = WebRequest.Create(uri);
            WebResponse response = request.GetResponse();
            Stream stream = response.GetResponseStream();
            MemoryStream ms = new MemoryStream();
            Byte[] buffer = new Byte[1024];
            int current = 0;
            while ((current = stream.Read(buffer, 0, buffer.Length)) != 0)
            {
                ms.Write(buffer, 0, current);
            }
            Bitmap bit = new Bitmap(ms);
            return bit;
        }