c#.net 接收 base64 格式的数据并解析为图片

using System;
using System.Collections.Generic;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Net;
using System.Net.Http;
using System.Runtime.Serialization.Formatters.Binary;
using System.Web;
using System.Web.Http;

namespace WebApi.Controllers
{
    public class HomeController : ApiController
    {
        /// <summary>
        /// 接收Base64编码格式的图片
        /// </summary>
        public void Upload()
        {
            //获取base64编码的图片
            HttpContextBase context = (HttpContextBase)Request.Properties["MS_HttpContext"];
            string text = context.Request.Form["file"];

            //获取文件储存路径
            string path = context.Request.MapPath("~/"); //获取当前项目所在目录
            string datetime = GetTimeStamp();
            string suffix = ".jpg"; //文件的后缀名根据实际情况
            string strPath = path + "App_Data/" + datetime + suffix;
            
            //获取图片并保存
            Base64ToImg(text.Split(',')[1]).Save(strPath);
        }

        //解析base64编码获取图片
        private Bitmap Base64ToImg(string base64Code)
        {
            MemoryStream stream = new MemoryStream(Convert.FromBase64String(base64Code));
            return new Bitmap(stream);
        }

        //获取当前时间段额时间戳
        public string GetTimeStamp()
        {
            TimeSpan ts = DateTime.UtcNow - new DateTime(1970, 1, 1, 0, 0, 0, 0);
            return Convert.ToInt64(ts.TotalMilliseconds).ToString();
        } 
    }
}