using System;
using System.Collections.Generic;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Runtime.Serialization.Formatters.Binary;
using System.Text;
using System.Threading.Tasks;

namespace AOI
{
    public class Base64Util
    {
        /// <summary>
        /// 将图片数据转换为Base64字符串
        /// </summary>
        public static string ToBase64(Image img)
        {
            if (img == null)
            {
                return "";
            }
            using (MemoryStream memStream = new MemoryStream())
            {
                BinaryFormatter binFormatter = new BinaryFormatter();
                binFormatter.Serialize(memStream, img);
                byte[] bytes = memStream.GetBuffer();
                string base64 = Convert.ToBase64String(bytes);
                return base64;
            }
        }

        /// <summary>
        /// 将Base64字符串转换为图片
        /// </summary>
        public static Image ToImage(string base64)
        {
            if (base64 == null || base64 == "")
            {
                return null;
            }
            byte[] bytes = Convert.FromBase64String(base64);
            using (MemoryStream memStream = new MemoryStream(bytes))
            {
                BinaryFormatter binFormatter = new BinaryFormatter();
                Image img = (Image)binFormatter.Deserialize(memStream);
                return img;
            }
        }
    }
}