c#ͼƬbase64ȥתÒå×Ö·û_c# ͼƬ Óë BASE64 ×Ö·û´® »¥Ïàת»»

using System;

using System.Collections.Generic;

using System.Drawing;

using System.IO;

using System.Linq;

using System.Web;

using System.Drawing.Imaging;

namespace Html5Image.Tools

{

public class ImageTool

{

//ͼƬ תΪ base64±àÂëµÄÎı¾

public static string ImgToBase64String(Bitmap bmp)

{

//Bitmap bmp = new Bitmap(Imagefilename);

//this.pictureBox1.Image = bmp;

//FileStream fs = new FileStream(Imagefilename + ".txt", FileMode.Create);

//StreamWriter sw = new StreamWriter(fs);

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();

String strbaser64 = Convert.ToBase64String(arr);

return strbaser64;

}

public static Bitmap Base64StringToImage(string base64Img)

{

byte[] bytes = Convert.FromBase64String(base64Img);

MemoryStream ms = new MemoryStream();

ms.Write(bytes, 0, bytes.Length);

Bitmap bmp = new Bitmap(ms);

return bmp;

}

///

/// ±£´æͼƬ

///

///

///

/// EX: System.Drawing.Imaging.Jpeg

public static void SaveFile(string base64Img, string imgPath, ImageFormat imgFormat )

{

string dir = Path.GetDirectoryName(imgPath);

if (!Directory.Exists(dir))

{

Directory.CreateDirectory(dir);

}

var bitmap = Base64StringToImage(base64Img);

bitmap.Save(imgPath, imgFormat);

}

}

}