using?System;
using?System.Collections.Generic;
using?System.ComponentModel;
using?System.Data;
using?System.Drawing;
using?System.Linq;
using?System.Text;
using?System.Windows.Forms;

namespace?PRanDataEncrypt
{
????public?partial?class?Form1?:?Form
????{
????????public?Form1（）
????????{
????????????InitializeComponent（）;
????????}

????????private?void?button1_Click（object?sender?EventArgs?e）
????????{
????????????if?（textBox3.Text?!=?““）
????????????{
????????????????if?（DecryptPwd（textBox3.Text）?==?textBox2.Text）
????????????????????MessageBox.Show（“用戶登錄成功！“?“提示“?MessageBoxButtons.OK?MessageBoxIcon.Information）;
????????????????else
????????????????????MessageBox.Show（“用戶密碼錯誤！“?“錯誤“?MessageBoxButtons.OK?MessageBoxIcon.Error）;
????????????}
????????}

????????private?void?button2_Click（object?sender?EventArgs?e）
????????{
????????????textBox1.Text?=?textBox2.Text?=?textBox3.Text?=?string.Empty;
????????????textBox2.Focus（）;
????????}

????????private?void?textBox2_TextChanged（object?sender?EventArgs?e）
????????{
????????????textBox3.Text?=?EncryptPwd（textBox2.Text）;
????????}

????????//定義加密用戶密碼所用的偽隨機數
????????private?string?randStr?=?“ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789abcdefghijklmnopqrstuvwxyz“;

????????#region?使用偽隨機數加密用戶登錄密碼
????????///?

????????///?使用偽隨機數加密用戶登錄密碼
????????///?

????????///?用戶登錄密碼
????????///?加密后的用戶登錄密碼
????????private?string?EncryptPwd（string?str）
????????{
????????????byte[]?btData?=?Encoding.Default.GetBytes（str）;
????????????int?j?k?m;
????????????int?len?=?randStr.Length;
????????????StringBuilder?sb?=?new?StringBuilder（）;
????????????Random?rand?=?new?Random（）;
????????????for?（int?i?=?0;?i?????????????{
????????????????j?=?（byte）rand.Next（6）;
????????????????btData[i]?=?（byte）（（int）btData[i]?^?j）;
????????????????k?=?（int）btData[i]?%?len;
????????????????m?=?（int）btData[i]?/?len;
????????????????m?=?m?*?8?+?j;
????????????????sb.Append（randStr.Substring（k?1）?+?randStr.Substring（m?1））;
????????????}
????????????return?sb.ToString（）;
????????}
????????#endregion

????????#region?解密用戶登錄密碼
????????///?

????????///?解密用戶登錄密碼
????????///?

????????///?經過加密的用戶登錄密碼
????????///?解密后的用戶登錄密碼
????????private?string?DecryptPwd（string?str）
????????{
????????????try
????????????{
????????????????int?j?k?m?n?=?0;
????????????????int?len?=?randStr.Length;
????????????????byte[]?btData?=?new?byte[str.Length?/?2];
????????????????for?（int?i?=?0;?i?????????????????{
????????????????????k?=?randStr.IndexOf（str[i]）;
????????????????????m?=?randStr.IndexOf（str[i?+?1]）;
????????????????????j?=?m?/?8;
????????????????????m?=?m?-?j?*?8;
????????????????????btData[n]?=?（byte）（j?*?len?+?k）;
????????????????????btData[n]?=?（byte）（（int）btData[n]?^?m）;
????????????????????n++;

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

?????文件???????3400??2008-12-15?15:19??C#偽隨機數加密完整源碼（十分經典）\Backup\PRanDataEncrypt\Form1.cs

?????文件???????6764??2008-12-15?15:19??C#偽隨機數加密完整源碼（十分經典）\Backup\PRanDataEncrypt\Form1.Designer.cs

?????文件???????5814??2008-12-15?15:19??C#偽隨機數加密完整源碼（十分經典）\Backup\PRanDataEncrypt\Form1.resx

?????文件???????3776??2008-12-13?10:14??C#偽隨機數加密完整源碼（十分經典）\Backup\PRanDataEncrypt\PRanDataEncrypt.csproj

?????文件????????496??2008-12-13?10:13??C#偽隨機數加密完整源碼（十分經典）\Backup\PRanDataEncrypt\Program.cs

?????文件???????1407??2008-12-13?10:13??C#偽隨機數加密完整源碼（十分經典）\Backup\PRanDataEncrypt\Properties\AssemblyInfo.cs

?????文件???????2880??2008-12-13?10:13??C#偽隨機數加密完整源碼（十分經典）\Backup\PRanDataEncrypt\Properties\Resources.Designer.cs

?????文件???????5612??2008-12-13?10:13??C#偽隨機數加密完整源碼（十分經典）\Backup\PRanDataEncrypt\Properties\Resources.resx

?????文件???????1100??2008-12-13?10:13??C#偽隨機數加密完整源碼（十分經典）\Backup\PRanDataEncrypt\Properties\Settings.Designer.cs

?????文件????????249??2008-12-13?10:13??C#偽隨機數加密完整源碼（十分經典）\Backup\PRanDataEncrypt\Properties\Settings.settings

?????文件????????935??2008-12-13?10:13??C#偽隨機數加密完整源碼（十分經典）\Backup\PRanDataEncrypt.sln

????..A..H.?????24576??2009-01-04?09:23??C#偽隨機數加密完整源碼（十分經典）\Backup\PRanDataEncrypt.suo

?????文件??????11776??2019-02-25?16:21??C#偽隨機數加密完整源碼（十分經典）\PRanDataEncrypt\bin\Debug\PRanDataEncrypt.exe

?????文件??????24064??2019-02-25?16:21??C#偽隨機數加密完整源碼（十分經典）\PRanDataEncrypt\bin\Debug\PRanDataEncrypt.pdb

?????文件??????11608??2019-02-25?16:21??C#偽隨機數加密完整源碼（十分經典）\PRanDataEncrypt\bin\Debug\PRanDataEncrypt.vshost.exe

?????文件???????3400??2019-02-25?16:21??C#偽隨機數加密完整源碼（十分經典）\PRanDataEncrypt\Form1.cs

?????文件???????7630??2019-02-25?16:21??C#偽隨機數加密完整源碼（十分經典）\PRanDataEncrypt\Form1.Designer.cs

?????文件???????5814??2019-02-25?16:21??C#偽隨機數加密完整源碼（十分經典）\PRanDataEncrypt\Form1.resx

?????文件????????789??2019-02-25?16:21??C#偽隨機數加密完整源碼（十分經典）\PRanDataEncrypt\obj\Debug\DesignTimeResolveAssemblyReferences.cache

?????文件???????6116??2019-02-25?16:21??C#偽隨機數加密完整源碼（十分經典）\PRanDataEncrypt\obj\Debug\DesignTimeResolveAssemblyReferencesInput.cache

?????文件???????1422??2019-02-25?16:21??C#偽隨機數加密完整源碼（十分經典）\PRanDataEncrypt\obj\Debug\PRanDataEncrypt.csproj.FileListAbsolute.txt

?????文件????????847??2019-02-25?16:21??C#偽隨機數加密完整源碼（十分經典）\PRanDataEncrypt\obj\Debug\PRanDataEncrypt.csproj.GenerateResource.Cache

?????文件??????11776??2019-02-25?16:21??C#偽隨機數加密完整源碼（十分經典）\PRanDataEncrypt\obj\Debug\PRanDataEncrypt.exe

?????文件????????180??2019-02-25?16:21??C#偽隨機數加密完整源碼（十分經典）\PRanDataEncrypt\obj\Debug\PRanDataEncrypt.Form1.resources

?????文件??????24064??2019-02-25?16:21??C#偽隨機數加密完整源碼（十分經典）\PRanDataEncrypt\obj\Debug\PRanDataEncrypt.pdb

?????文件????????180??2019-02-25?16:21??C#偽隨機數加密完整源碼（十分經典）\PRanDataEncrypt\obj\Debug\PRanDataEncrypt.Properties.Resources.resources

?????文件???????4608??2019-02-25?16:21??C#偽隨機數加密完整源碼（十分經典）\PRanDataEncrypt\obj\Debug\TempPE\Properties.Resources.Designer.cs.dll

?????文件???????4095??2019-02-25?16:21??C#偽隨機數加密完整源碼（十分經典）\PRanDataEncrypt\PRanDataEncrypt.csproj

?????文件????????496??2008-12-13?10:13??C#偽隨機數加密完整源碼（十分經典）\PRanDataEncrypt\Program.cs

?????文件???????1407??2008-12-13?10:13??C#偽隨機數加密完整源碼（十分經典）\PRanDataEncrypt\Properties\AssemblyInfo.cs

............此處省略28個文件信息