C#与unity中base64string和图片互转

C#:

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

using System.Drawing;

using System.IO;

namespace test_CS_1

{

    class Program

    {

        static void Main(string[] args)

        {

            string fileDir = "E:/DX12/Sketch3DToolkit-master/matlab/";

            //文件名称

            string filePath = Path.Combine(fileDir, "new");

            string UserPhoto;

            //读图片转为Base64String

            System.Drawing.Bitmap bmp1 = new System.Drawing.Bitmap(Path.Combine(fileDir, "2.png"));

            using (MemoryStream ms1 = new MemoryStream())

            {

                //将文件指定格式保存到指定流中

                bmp1.Save(ms1, System.Drawing.Imaging.ImageFormat.Png);

                byte[] arr1 = new byte[ms1.Length];

                ms1.Position = ;

                //从当前流读取字节块，并写入缓存区

                ms1.Read(arr1, , (int)ms1.Length);

                ms1.Close();

                //将缓存区数据byte[],转为base64string

                UserPhoto = Convert.ToBase64String(arr1);

            }

            //将Base64String转为图片并保存

            byte[] arr2 = Convert.FromBase64String(UserPhoto);

            using (MemoryStream ms2 = new MemoryStream(arr2))

            {

                System.Drawing.Bitmap bmp2 = new System.Drawing.Bitmap(ms2);

                //以指定格式保存到指定文件

                bmp2.Save(filePath + ".png", System.Drawing.Imaging.ImageFormat.Png);

            }

        }

    }

}

unity:

using System.Collections;

using System.Collections.Generic;

using UnityEngine;

using System;

using System.IO;

public class test_texture2d : MonoBehaviour {

    // Use this for initialization

    //base64转图片

    public string Base64ToTexture2d(string Base64STR)

    {

        Texture2D pic = new Texture2D(, );

        byte[] data = System.Convert.FromBase64String(Base64STR);

        pic.LoadImage(data);

        byte[] bytes = pic.EncodeToPNG();

        //下面是为了方便了解图片的信息写的

        string year = System.DateTime.Now.Year.ToString();

        string month = System.DateTime.Now.Month.ToString();

        string day = System.DateTime.Now.Day.ToString();

        string hour = System.DateTime.Now.Hour.ToString();

        string minute = System.DateTime.Now.Minute.ToString();

        string secend = System.DateTime.Now.Second.ToString();

        //存储路径

        string FileFullPath = Application.dataPath/*这是获取assets前的文件路径*/ + "/" + year + "-" + month + "-" + day + "-" + hour + "-" + minute + "-" + secend + ".png";

        File.WriteAllBytes(FileFullPath, bytes);

        return FileFullPath;

    }

    //图片转base64string

    public string Texture2dToBase64(string texture2d_path)

    {

        //将图片文件转为流文件

        FileStream fs = new System.IO.FileStream(texture2d_path, System.IO.FileMode.Open, System.IO.FileAccess.Read);

        byte[] thebytes = new byte[fs.Length];

        fs.Read(thebytes, , (int)fs.Length);

        //转为base64string

        string base64_texture2d = Convert.ToBase64String(thebytes);

        return base64_texture2d;

    }

    void Start () {

    }

    // Update is called once per frame

    void Update () {

    }

}

注意：需要生成其他格式图片，改相应的输出图片格式方法。