using?System;
using?System.IO;
using?System.Linq;
using?System.Text;
using?System.Windows.Forms;

namespace?Encryption
{
????public?partial?class?MainForm?:?Form
????{
????????private?static?char[]?base64CodeArray?=?new?char[]
????????{
????????????‘A‘?‘B‘?‘C‘?‘D‘?‘E‘?‘F‘?‘G‘?‘H‘?‘I‘?‘J‘?‘K‘?‘L‘?‘M‘?‘N‘?‘O‘?‘P‘?‘Q‘?‘R‘?‘S‘?‘T‘?‘U‘?‘V‘?‘W‘?‘X‘?‘Y‘?‘Z‘
????????????‘a‘?‘b‘?‘c‘?‘d‘?‘e‘?‘f‘?‘g‘?‘h‘?‘i‘?‘j‘?‘k‘?‘l‘?‘m‘?‘n‘?‘o‘?‘p‘?‘q‘?‘r‘?‘s‘?‘t‘?‘u‘?‘v‘?‘w‘?‘x‘?‘y‘?‘z‘
????????????‘0‘?‘1‘?‘2‘?‘3‘?‘4‘??‘5‘?‘6‘?‘7‘?‘8‘?‘9‘?‘+‘?‘/‘?‘=‘
????????};
????????public?MainForm（）
????????{
????????????InitializeComponent（）;
????????}
????????///?

????????///?是否base64字符串
????????///?

????????///?se64Str“>要判斷的字符串
????????///?字符串轉換成的字節(jié)數組
????????///?
????????public?static?bool?Isbase64（string?base64Str?out?byte[]?bytes）
????????{
????????????bytes?=?null;
????????????if?（string.IsNullOrEmpty（base64Str））
????????????????return?false;
????????????else
????????????{
????????????????if?（base64Str.Contains（““））
????????????????????base64Str?=?base64Str.Split（‘‘）[1];
????????????????if?（base64Str.Length?%?4?!=?0）
????????????????????return?false;
????????????????if?（base64Str.Any（c?=>?!base64CodeArray.Contains（c）））
????????????????????return?false;
????????????}
????????????try
????????????{
????????????????bytes?=?Convert.Frombase64String（base64Str）;
????????????????return?true;
????????????}
????????????catch?（FormatException）
????????????{
????????????????return?false;
????????????}
????????}

????????private?void?btEn_Click（object?sender?EventArgs?e）
????????{
????????????byte[]?bytes?=?Encoding.Default.GetBytes（tbContent.Text）;
????????????tbEnContent.Text?=?Convert.Tobase64String（bytes）;
????????}

????????private?void?btDe_Click（object?sender?EventArgs?e）
????????{
????????????byte[]?outputb?=?Convert.Frombase64String（tbEnContent.Text）;
????????????tbContent.Text?=?Encoding.Default.GetString（outputb）;
????????}

????????private?void?btSave_Click（object?sender?EventArgs?e）
????????{
????????????SaveFileDialog?save?=?new?SaveFileDialog（）;
????????????save.InitialDirectory?=?“C:\\“;
????????????save.FileName?=?“Config.ini“;
????????????save.RestoreDirectory?=?true;
????????????save.FilterIndex?=?1;
????????????if?（save.ShowDialog（）?==?DialogResult.OK）
????????????{
????????????????string?str?=?save.FileName;
????????????????//向指定的文件中追加內容，如果文件不存在，則創(chuàng)建文件
????????????????StreamWriter?sw?=?File.CreateText（str）;
????????????????sw.Write（tbEnContent.Text）;
????????????????sw.Flush（）;
????????????????sw.Close（）;
????????????????MessageBox.Show（“保存成功“?“提示“?MessageBoxButtons.OK）;
????????????}
????????}

????????private?void?btOpen_Click（object?sender?EventArgs?e）
????????{
????????????tbContent.Text?=?““;
????????????tbEnContent.Text

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

????..A..H.?????68608??2020-08-29?16:50??Encryption\.vs\Encryption\v14\.suo

?????文件??????13312??2020-08-29?16:19??Encryption\Encryption\bin\Debug\Encryption.exe

?????文件??????24064??2020-08-29?16:19??Encryption\Encryption\bin\Debug\Encryption.pdb

?????文件??????21680??2020-08-29?16:41??Encryption\Encryption\bin\Debug\Encryption.vshost.exe

?????文件????????490??2019-03-19?12:46??Encryption\Encryption\bin\Debug\Encryption.vshost.exe.manifest

?????文件???????3703??2020-08-27?17:36??Encryption\Encryption\Encryption.csproj

?????文件???????4989??2020-08-29?16:50??Encryption\Encryption\MainForm.cs

?????文件???????8090??2020-08-28?12:35??Encryption\Encryption\MainForm.Designer.cs

?????文件???????5817??2020-08-28?12:35??Encryption\Encryption\MainForm.resx

?????文件???????1230??2020-08-29?15:56??Encryption\Encryption\obj\Debug\DesignTimeResolveAssemblyReferences.cache

?????文件???????6834??2020-08-28?11:06??Encryption\Encryption\obj\Debug\DesignTimeResolveAssemblyReferencesInput.cache

?????文件????????693??2020-08-29?16:41??Encryption\Encryption\obj\Debug\Encryption.csproj.FileListAbsolute.txt

?????文件????????908??2020-08-28?12:35??Encryption\Encryption\obj\Debug\Encryption.csproj.GenerateResource.Cache

?????文件???????1758??2020-08-27?17:12??Encryption\Encryption\obj\Debug\Encryption.csprojResolveAssemblyReference.cache

?????文件??????13312??2020-08-29?16:19??Encryption\Encryption\obj\Debug\Encryption.exe

?????文件????????180??2020-08-28?12:35??Encryption\Encryption\obj\Debug\Encryption.MainForm.resources

?????文件??????24064??2020-08-29?16:19??Encryption\Encryption\obj\Debug\Encryption.pdb

?????文件????????180??2020-08-27?17:36??Encryption\Encryption\obj\Debug\Encryption.Properties.Resources.resources

?????文件????????494??2020-08-27?17:12??Encryption\Encryption\Program.cs

?????文件???????1328??2020-08-27?17:08??Encryption\Encryption\Properties\AssemblyInfo.cs

?????文件???????2833??2020-08-27?17:08??Encryption\Encryption\Properties\Resources.Designer.cs

?????文件???????5612??2020-08-27?17:08??Encryption\Encryption\Properties\Resources.resx

?????文件???????1097??2020-08-27?17:08??Encryption\Encryption\Properties\Settings.Designer.cs

?????文件????????249??2020-08-27?17:08??Encryption\Encryption\Properties\Settings.settings

?????文件????????997??2020-08-27?17:09??Encryption\Encryption.sln

?????目錄??????????0??2020-08-27?17:08??Encryption\Encryption\obj\Debug\TempPE

?????目錄??????????0??2020-08-27?17:09??Encryption\.vs\Encryption\v14

?????目錄??????????0??2020-08-28?11:07??Encryption\Encryption\bin\Debug

?????目錄??????????0??2020-08-29?15:56??Encryption\Encryption\obj\Debug

?????目錄??????????0??2020-08-27?17:08??Encryption\.vs\Encryption

............此處省略9個文件信息