collectinformation/CollectInformation/Tools/Image2Base64Utils.cs

using System;
using System.Drawing;
using System.IO;

namespace CollectInformation.Tools
{
    static class Image2Base64Utils
    {
        #region 图片转为base64编码的字符串
        public static string ImgToBase64String(Bitmap bmp)
        {
            try
            {
                MemoryStream ms = new MemoryStream();
                bmp.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg);
                byte[] arr = new byte[ms.Length];
                ms.Position = 0;
                ms.Read(arr, 0, (int)ms.Length);
                ms.Close();
                return Convert.ToBase64String(arr);
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.Message);
                return null;
            }
        }
        #endregion

        #region base64编码的字符串转为图片
        public static Image Base64StringToImage(string strbase64)
        {

            try
            {
                byte[] arr = Convert.FromBase64String(strbase64);
                MemoryStream ms = new MemoryStream(arr);
                System.Drawing.Image img = System.Drawing.Image.FromStream(ms);

                //System.Drawing.Image img = System.Drawing.Image.FromStream(ms);
                //img.Save("ImgName.jpg", System.Drawing.Imaging.ImageFormat.Jpeg);
                //img.Save("ImgName.bmp", ImageFormat.Bmp);
                //img.Save("ImgName.gif", ImageFormat.Gif);
                //img.Save(@"images\ImgName.png", ImageFormat.Png);
                return img;
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.Message);
                return null;
            }
        }
        #endregion

    }
}