C#中图片.BYTE[]和base64string的转换方法

Bitmap bmp =newBitmap(filepath);

  MemoryStream ms =newMemoryStream();

  bmp.Save(ms, System.Drawing.Imaging.ImageFormat.Gif);

  byte[] arr =newbyte[ms.Length];

  ms.Position = 0;

  ms.Read(arr, 0, (int)ms.Length);

  ms.Close();

string  pic = Convert.ToBase64String(arr);

byte[] imageBytes = Convert.FromBase64String(pic);

//读入MemoryStream对象

MemoryStream memoryStream =newMemoryStream(imageBytes, 0, imageBytes.Length);

memoryStream.Write(imageBytes, 0, imageBytes.Length);

//转成图片

Image image = Image.FromStream(memoryStream);