C# 上传到azure 容器_c# 将文件上传到azure blob 中

  public class ImageHelper
    {
        public static string SaveImage(string base64String,string imageDir)
        {
            string picPath = "";
 
            try
            {
                byte[] bytes = System.Convert.FromBase64String(base64String);//base64转为byte数组
                MemoryStream ms = new MemoryStream(bytes);//创建内存流，将图片编码导入
                Image image = Image.FromStream(ms);
 
                Random ran = new Random((int)DateTime.Now.Ticks);
                string fileName = DateTime.Now.ToString("yyyyMMddhhmmssms") + ran.Next() + ".jpeg";
                //文件保存位置及命名，精确到毫秒并附带一组随机数，防止文件重名，数据库保存路径为此变量
                string serverPath = imageDir + "\\" + fileName;
                string fullPath = (System.AppDomain.CurrentDomain.BaseDirectory + serverPath);
                
                ImageFormat imgfor = ImageFormat.Jpeg;//设置图片格式
                image.Save(fullPath, imgfor); //保存图片
 
                ms.Close();
                ms.Dispose();
                image.Dispose();
 
                picPath = imageDir + "/" + fileName;
            }
            catch (Exception err)
            {
 
            }
            
 
            return picPath;
        }
 
        public static byte[] GetImageAsByteArray(string imageFilePath)
        {
            using (FileStream fileStream = new FileStream(imageFilePath, FileMode.Open, FileAccess.Read))
            {
                using (BinaryReader binaryReader = new BinaryReader(fileStream))
                {
                    return binaryReader.ReadBytes((int)fileStream.Length);
                }
            }
        }
 
        public static string GetBase64String(byte[] data)
        {
            return Convert.ToBase64String(data);
        }
 
        /// <summary>
        /// 无损压缩图片
        /// </summary>
        /// <param name="sFile">原图片地址</param>
        /// <param name="dFile">压缩后保存图片地址</param>
        /// <param name="flag">压缩质量（数字越小压缩率越高）1-100</param>
        /// <param name="size">压缩后图片的最大大小</param>
        /// <param name="sfsc">是否是第一次调用</param>
        /// <returns></returns>
        public static bool CompressImage(string sFile, string dFile, int flag = 97, int size = 500, bool sfsc = true)
        {
            //如果是第一次调用，原始图像的大小小于要压缩的大小，则直接复制文件，并且返回true
            FileInfo firstFileInfo = new FileInfo(sFile);
            if (sfsc == true && firstFileInfo.Length < size * 1024)
            {
                firstFileInfo.CopyTo(dFile);
                return true;
            }
            Image iSource = Image.FromFile(sFile);
            ImageFormat tFormat = iSource.RawFormat;
            int dHeight, dWidth;
            if(iSource.Height > 1500 || iSource.Width > 1500)
            {
                dHeight = iSource.Height * 2 / 3;
                dWidth = iSource.Width * 2 / 3;
            }
            else
            {
                dHeight = iSource.Height;
                dWidth = iSource.Width;
            }
            int sW = 0, sH = 0;
            //按比例缩放
            Size tem_size = new Size(iSource.Width, iSource.Height);
            if (tem_size.Width > dHeight || tem_size.Width > dWidth)
            {
                if ((tem_size.Width * dHeight) > (tem_size.Width * dWidth))
                {
                    sW = dWidth;
                    sH = (dWidth * tem_size.Height) / tem_size.Width;
                }
                else
                {
                    sH = dHeight;
                    sW = (tem_size.Width * dHeight) / tem_size.Height;
                }
            }
            else
            {
                sW = tem_size.Width;
                sH = tem_size.Height;
            }
 
            Bitmap ob = new Bitmap(dWidth, dHeight);
            Graphics g = Graphics.FromImage(ob);
 
            g.Clear(Color.WhiteSmoke);
            g.CompositingQuality = System.Drawing.Drawing2D.CompositingQuality.HighQuality;
            g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
            g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;
 
            g.DrawImage(iSource, new Rectangle((dWidth - sW) / 2, (dHeight - sH) / 2, sW, sH), 0, 0, iSource.Width, iSource.Height, GraphicsUnit.Pixel);
 
            g.Dispose();
 
            //以下代码为保存图片时，设置压缩质量
            EncoderParameters ep = new EncoderParameters();
            long[] qy = new long[1];
            qy[0] = flag;//设置压缩的比例1-100
            EncoderParameter eParam = new EncoderParameter(System.Drawing.Imaging.Encoder.Quality, qy);
            ep.Param[0] = eParam;
 
            try
            {
                ImageCodecInfo[] arrayICI = ImageCodecInfo.GetImageEncoders();
                ImageCodecInfo jpegICIinfo = null;
                for (int x = 0; x < arrayICI.Length; x++)
                {
                    if (arrayICI[x].FormatDescription.Equals("JPEG"))
                    {
                        jpegICIinfo = arrayICI[x];
                        break;
                    }
                }
                if (jpegICIinfo != null)
                {
                    ob.Save(dFile, jpegICIinfo, ep);//dFile是压缩后的新路径
                    FileInfo fi = new FileInfo(dFile);
                    if (fi.Length > 1024 * size)
                    {
                        flag = flag - 10;
                        CompressImage(sFile, dFile, flag, size, false);
                    }
                }
                else
                {
                    ob.Save(dFile, tFormat);
                }
                return true;
            }
            catch
            {
                return false;
            }
            finally
            {
                iSource.Dispose();
                ob.Dispose();
            }
        }
 
        /// <summary>
        /// 根据路径删除文件
        /// </summary>
        /// <param name="path"></param>
        public static void DeleteFile(string path)
        {
            FileAttributes attr = File.GetAttributes(path);
            if (attr == FileAttributes.Directory)
            {
                Directory.Delete(path, true);
            }
            else
            {
                File.Delete(path);
            }
        }
    }