ShentunApp/Net.Framework/Ecg/ShenTun.Ecg.Public/ImageHelper.cs

using System;
using System.Drawing;
using System.Drawing.Imaging;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ShenTun.Ecg.Common
{
    public class ImageHelper
    {
        public static string ConvertImageToBase64(Image file)
        {
            using (MemoryStream memoryStream = new MemoryStream())
            {
                file.Save(memoryStream, file.RawFormat);
                byte[] imageBytes = memoryStream.ToArray();
                return Convert.ToBase64String(imageBytes);
            }
        }

        public static Image ConvertBase64ToImage(string base64String)
        {
            byte[] imageBytes = Convert.FromBase64String(base64String);
            using (MemoryStream ms = new MemoryStream(imageBytes, 0, imageBytes.Length))
            {
                ms.Write(imageBytes, 0, imageBytes.Length);
                return Image.FromStream(ms, true);
            }
        }
    }
}