using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;namespace 文件加密
{public partial class Form1 : Form{public Form1(){InitializeComponent();}private void btnFile_Click(object sender, EventArgs e){OpenFileDialog ofd = new OpenFileDialog();ofd.Title = "请选择要加密的文件";//初始路径ofd.InitialDirectory = @"C:\Users\home\Desktop";ofd.Filter = "所有文件|*.*";ofd.ShowDialog();txtFile.Text = ofd.FileName;}private void btnCode_Click(object sender, EventArgs e){SaveFileDialog sfd = new SaveFileDialog();sfd.Title = "请选择要保存文件的路径";sfd.InitialDirectory = @"C:\Users\home\Desktop";sfd.Filter = "所有文件|*.*";sfd.ShowDialog();txtCodeFile.Text = sfd.FileName;//调用方法MakeCode( "加密");}private void btnUnCode_Click(object sender, EventArgs e){SaveFileDialog sfd = new SaveFileDialog();sfd.Title = "请选择要保存文件的路径";sfd.InitialDirectory = @"C:\Users\home\Desktop";sfd.Filter = "所有文件|*.*";sfd.ShowDialog();txtCodeFile.Text = sfd.FileName;//调用方法MakeCode("解密");}public void MakeCode(string content) {//1 先读取文件using (FileStream fsRead = new FileStream(txtFile.Text.Trim(), FileMode.OpenOrCreate, FileAccess.Read)){using (FileStream fsWrite = new FileStream(txtCodeFile.Text.Trim(), FileMode.OpenOrCreate, FileAccess.Write)){//设置进度条progressBar1.Maximum = (int)fsRead.Length;byte[] buffer = new byte[1024 * 1024 * 5];while (true){int r = fsRead.Read(buffer, 0, buffer.Length);if (r == 0){break;}byte passWord = 0;if (byte.TryParse(txtPassword.Text.Trim(), out passWord)&& content.Equals("加密")){for (int i = 0; i < buffer.Length; i++){buffer[i] += passWord;}}if (byte.TryParse(txtPassword.Text.Trim(), out passWord) && content.Equals("解密")){for (int i = 0; i < buffer.Length; i++){buffer[i] -= passWord;}}fsWrite.Write(buffer, 0, r);progressBar1.Value = (int)fsWrite.Length;}}MessageBox.Show("保存成功!");}}}
}