code.cs

该商品销售管理系统是一个基于WEB的适应于小型企业的管理系统！可以实现商品基本信息的查询。添加

using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;
using System.Security.Cryptography;
using System.Text;
using System.IO;
/// <summary>
/// code 的摘要说明
/// </summary>
public class code
{
	public code()
	{
		//
		// TODO: 在此处添加构造函数逻辑
		//
	}
    public string Encrypt(string data)
    {
        try
        {
            DESCryptoServiceProvider desc = new DESCryptoServiceProvider();
            byte[] datastring = System.Text.Encoding.UTF8.GetBytes(data);
            MemoryStream ms = new MemoryStream();
            CryptoStream cs = new CryptoStream(ms, desc.CreateEncryptor(keybyte, keybyte), CryptoStreamMode.Write);
            cs.Write(datastring, 0, datastring.Length);
            cs.FlushFinalBlock();
            cs.Close();
            return Convert.ToBase64String(ms.ToArray());
        }
        catch (Exception ex)
        {
            return data;
        }
    }
    public string Decrypt(string data)
    {
        try
        {
            DESCryptoServiceProvider desc = new DESCryptoServiceProvider();
            byte[] datastring = Convert.FromBase64String(data);
            MemoryStream ms = new MemoryStream();
            CryptoStream cs = new CryptoStream(ms, desc.CreateDecryptor(keybyte, keybyte), CryptoStreamMode.Write);
            cs.Write(datastring, 0, datastring.Length);
            cs.FlushFinalBlock();
            cs.Close();
            return Encoding.UTF8.GetString(ms.ToArray());
        }
        catch (Exception e)
        {
            return data;
        }

    }
    byte[] keybyte = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF };
}