aliexpress 上传图

首先，图片转化为字节流

        public byte[] ImagefileToByte(string srcImagePath)

        {

            System.IO.MemoryStream m = new System.IO.MemoryStream();

            System.Drawing.Bitmap bp = new System.Drawing.Bitmap(srcImagePath);

            bp.Save(m,System.Drawing.Imaging.ImageFormat.Jpeg);

            byte[] ImageByte = m.GetBuffer();

            return ImageByte;

        }

最外层调用的方法

        public string postUploadImage(string ImagePath)

        {

            string fileName = System.IO.Path.GetFileName(ImagePath);

            byte[] fileDatas = upImg.ImagefileToByte(ImagePath);

            Stream stream = new MemoryStream(fileDatas);

            string uploadImageResult = CreatePostHttpRespone(uploadImageUrl, stream, "application/octet-stream");

            return uploadImageResult;

            //uploadImageUrl=http://gw.api.alibaba.com/openapi/param2/1/aliexpress.open/api.uploadImage/自己店铺的appkey?fileName=aa.jpg&_aop_signature=签名

        }

       public  string CreatePostHttpRespone(string url,Stream stream,string contentType)

        {

                if (string.IsNullOrEmpty(url))

                {

                    throw new ArgumentNullException("url");

                }

                HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url) ;

                request.Method = "POST";

                request.Accept = "*/*";

                request.KeepAlive = true;

                request.ContentType = contentType;

                request.Credentials = System.Net.CredentialCache.DefaultCredentials;

                request.ContentLength = stream.Length;

                using (Stream requestStream = request.GetRequestStream())

                {

                    //将内存流数据读取位置归零

                    stream.Position = ;

                    byte[] tempBuffer = new byte[stream.Length];

                    stream.Read(tempBuffer, , tempBuffer.Length);

                    stream.Close();

                    //将内存流中的buffer写入到请求写入流

                    requestStream.Write(tempBuffer, , tempBuffer.Length);

                    requestStream.Close();

                    //获取到上传请求的响应

                    WebResponse response = request.GetResponse();

                    //获取到上传返回的数据

                    //string html = GetResponseString(response);

                    StreamReader reader = new StreamReader(response.GetResponseStream(), System.Text.Encoding.UTF8);

                    string content = reader.ReadToEnd();

                    response.Close();

                    request = null;

                    return content;

                }

            }