Base64编码的字符串与图片的转换代码,CSharp代码库,德仔网

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【CSharp】 Base64编码的字符串与图片的转换

作者:Dezai.CN / 发布于2012/8/30/ 724

Base64编码的字符串与图片的转换

<div>using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.IO;
using System.Drawing.Imaging;</div>
<div>namespace base64_img
{
 public partial class Form1 : Form
 {
 public Form1()
 {
 InitializeComponent();
 }
<div> //图片 转为 base64编码的文本
 private void button1_Click(object sender, EventArgs e)
 {
 OpenFileDialog dlg = new OpenFileDialog();
 dlg.Title = "选择要转换的图片";
 dlg.Filter = "Image files (*.jpg;*.bmp;*.gif)|*.jpg*.jpeg;*.gif;*.bmp|AllFiles (*.*)|*.*";
 if (DialogResult.OK == dlg.ShowDialog())
 {
 ImgToBase64String(dlg.FileName);
 }
 }
 //图片 转为 base64编码的文本
 private void ImgToBase64String(string Imagefilename)
 {
 try
 {
 Bitmap bmp = new Bitmap(Imagefilename);
 this.pictureBox1.Image = bmp;
 FileStream fs = new FileStream(Imagefilename + ".txt", FileMode.Create);
 StreamWriter sw = new StreamWriter(fs);</div>
<div> 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);
 sw.Write(strbaser64);</div>
<div> sw.Close();
 fs.Close();
 MessageBox.Show("转换成功!");
 }
 catch (Exception ex)
 {
 MessageBox.Show("ImgToBase64String 转换失败/nException:" + ex.Message);
 }
 }
<div> //base64编码的文本 转为 图片
 private void button2_Click(object sender, EventArgs e)
 {
 OpenFileDialog dlg = new OpenFileDialog();
 dlg.Title = "选择要转换的base64编码的文本";
 dlg.Filter = "txt files|*.txt";
 if (DialogResult.OK == dlg.ShowDialog())
 {
 Base64StringToImage(dlg.FileName);
 }
 }
 //base64编码的文本 转为 图片
 private void Base64StringToImage(string txtFileName)
 {
 try
 {
 FileStream ifs = new FileStream(txtFileName, FileMode.Open, FileAccess.Read);
 StreamReader sr = new StreamReader(ifs);</div>
<div> String inputStr = sr.ReadToEnd();
 byte[] arr = Convert.FromBase64String(inputStr);
 MemoryStream ms = new MemoryStream(arr);
 Bitmap bmp = new Bitmap(ms);</div>
<div> bmp.Save(txtFileName + ".jpg", System.Drawing.Imaging.ImageFormat.Jpeg);
 //bmp.Save(txtFileName + ".bmp", ImageFormat.Bmp);
 //bmp.Save(txtFileName + ".gif", ImageFormat.Gif);
 //bmp.Save(txtFileName + ".png", ImageFormat.Png);
 ms.Close();
 sr.Close();
 ifs.Close();
 this.pictureBox1.Image = bmp;
 MessageBox.Show("转换成功！");
 }
 catch (Exception ex)
 {
 MessageBox.Show("Base64StringToImage 转换失败/nException："+ex.Message);
 }
 }
 }
}
<div></div>

试试其它关键字

　Base64　

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