Base64与图片互转

 

base64 to 图片

https://github.com/ITAgnesmeyer/EasyBase64ToImage

 

 public class ImageToString
    {
        /// <summary>
        /// Converts Image to Base64
        /// </summary>
        /// <param name="image">Image</param>
        /// <returns>Base64 String</returns>
        public static string ImageToBase64(Image image)
        {
            using (var m = new MemoryStream())
            {
                image.Save(m, image.RawFormat);
                byte[] imageBytes = m.ToArray();
                string base64String = Convert.ToBase64String(imageBytes);
                return base64String;
            }
        }

        /// <summary>
        /// Converts Base64-String to Image
        /// </summary>
        /// <param name="base64String"></param>
        /// <returns></returns>
        public static Image Base64ToImage(string base64String)
        {
            byte[] imageBytes = Convert.FromBase64String(base64String);
            using (var ms = new MemoryStream(imageBytes, 0, imageBytes.Length))
            {
                ms.Write(imageBytes, 0, imageBytes.Length);
                Image image = Image.FromStream(ms);
                return image;
            }
        }
    }

 

基于上述代码，然后以bitmap存储相应格式（Image直接存储jpg有点儿问题，在system.drawing中会报错。）

using Microsoft.AspNetCore.Mvc;
using System.Drawing;

        public Task<int> AddNewGW(GWaModel gWModel)
        {
            gWs.Add(gWModel);
            string typeimg = gWModel.Image1.Split(';')[0].Split('/')[1];//get img format
            string base64 = gWModel.Image1.Replace("data:image/" + typeimg + ";base64,", string.Empty); //replace format, only need the base64 string
            Image image = EasyBase64ToImage.ImageToString.Base64ToImage(base64);

            Bitmap bitmap = new Bitmap(image);
            bitmap.Save($"C:\\Temp\\Img\\{DateTime.Now.ToString("yyyyMMdd hhmmssff")}.{typeimg}", image.RawFormat);
            return Task.FromResult(0);
        }