C#Base64编码的字符串与图片的转换
2015-08-25 12:01
1166 查看
出自:http://blog.csdn.net/marquess/article/details/2732629
代码:
代码:
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; namespace base64_img { public partial class Form1 : Form { public Form1() { InitializeComponent(); } //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); 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); sw.Close(); fs.Close(); MessageBox.Show("转换成功!"); } catch (Exception ex) { MessageBox.Show("ImgToBase64String 转换失败/nException:" + ex.Message); } } //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); String inputStr = sr.ReadToEnd(); byte[] arr = Convert.FromBase64String(inputStr); MemoryStream ms = new MemoryStream(arr); Bitmap bmp = new Bitmap(ms); 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); } } } }My eg:
void btnTest_Click(object sender, EventArgs e) { string strParams = ""; strParams += "name=王蒙蒙"; strParams += "&xingbie=男"; System.Net.WebClient client = new System.Net.WebClient(); string reply = client.DownloadString("http://xxx.asp?" + strParams); //http地址并返回结果 byte[] arr = Convert.FromBase64String(reply.Split('|')[1]); MemoryStream ms = new MemoryStream(arr); Bitmap bmp = new Bitmap(ms); string strFileName = "test.jpg"; //图片名称 string Opath = @"D:/Photo"; //保存图片路径 bmp.Save(Opath+strFileName, System.Drawing.Imaging.ImageFormat.Jpeg); ms.Close(); }
相关文章推荐
- 浅析C#中的Lambda表达式
- 浅析C#中的Lambda表达式
- The .NET weak event pattern in C#
- 浅析C#中的Func<>委托
- Winform(C#)Flash控件 属性 方法 事件
- 浅析C#中的Func<>委托
- C#性能优化考虑的几个方向
- C#读取DWG文件方法
- C#时间戳转换DateTime
- 对C#泛型实例化对像
- C#:向控件添加信息类
- Visual C#2010学习笔记八之out和ref的使用
- 《C#入门经典(第6版)》读书笔记2_第二章:编写C#程序
- C#字符串排序-倒序输出
- C#:WiFi
- 《C#入门经典(第6版)》读书笔记1_第一章:C#简介
- 浅析C#中的委托
- 浅析C#中的委托
- C#深拷贝
- ORA-01000:超出打开游标的最大数 的解决办法(C#)