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
{
//图片 转为 base64编码的文本
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;
}
/// <summary>
/// 保存图片
/// </summary>
/// <param name="base64Img"></param>
/// <param name="imgPath"></param>
/// <param name="imgFormat">EX: System.Drawing.Imaging.Jpeg </param>
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);
}
}
}
