软件试用期设计

最近工作比较忙,没什么时间来博客 . 如今工作接近尾声, 现在总结一些以后需要用到的功能.

产品在正式交付给客户之前需要交付一个试用版本,可以使用一百次.

我想到的实现办法很简单,在注册表写如一个数据,每次使用数据就+1 . 代码如下:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Microsoft.Win32;

namespace ConsoleApplication4
{
    class Program
    {
        static void Main(string[] args)
        {

            if (Flag())
            {
                Console.WriteLine("成功");
            }
            else
            {
                Console.WriteLine("试用期已过");
            }
        }

        /// <summary>
        /// 写入注册表
        /// </summary>
        /// <param name="Count"></param>
        private static void SetRegedit(int Count)
        {
            RegistryKey Huser = Registry.CurrentUser;
            RegistryKey zcb = Huser.OpenSubKey(@"Software\Microsoft\Windows\CurrentVersion\Policies\System\Service\Number", true);
            zcb.SetValue("ShellValue", Count);
        }

        /// <summary>
        /// 读取注册表
        /// </summary>
        /// <returns></returns>
        private static int ReadRegedit()
        {
            int count = 0;
            try
            {
                RegistryKey Huser = Registry.CurrentUser;
                RegistryKey zcb = Huser.OpenSubKey(@"Software\Microsoft\Windows\CurrentVersion\Policies\System\Service\Number", true);
                count = Convert.ToInt32(zcb.GetValue("ShellValue"));
                SetRegedit(count + 1);
            }
            catch
            {
                CreateRegedit();
            }

            SetRegedit(count + 1);
            return count;
        }

        /// <summary>
        /// 判断试用期
        /// </summary>
        /// <returns></returns>
        public static bool Flag()
        {
            int count = ReadRegedit();
            if (count <= 2)
            {
                return true;
            }

            return false;
        }

        /// <summary>
        /// 创建注册列表
        /// </summary>
        private static void CreateRegedit()
        {
            RegistryKey Huser = Registry.CurrentUser;
            RegistryKey zcb = Huser.OpenSubKey(@"Software\Microsoft\Windows\", true);
            RegistryKey ssub = zcb.CreateSubKey(@"CurrentVersion\Policies\System\Service\Number", RegistryKeyPermissionCheck.ReadWriteSubTree);

            ssub.SetValue("ShellValue", 0);
        }
    }
}

当然这是最简单的,你也可以设计试用时间的长短, 插入一个时间也行. 但是值得注意的是, 你所插入的注册表目录需要很隐蔽.不容易被找到.