【ASP】注册表的读写

关于注册表的作用，这里暂不作介绍。主要讨论下注册表的读写方法：

1，首先我们认识下注册表如何让打开：程序=》搜索=》regedit=》

2注册表包含五大类分别是：

1，HKEY_CLASSES_ROOT
2，HKEY_CURRENT_USER
3，HKEY_LOCAL_MACHING
4，HKEY_USERS
5，HKEY_CURRENT_CONFIG

3注册表的写方法：

 //写入注册表
        private void button1_Click(object sender, EventArgs e)
        {
            RegistryKey rk = null;
            if (Registry.LocalMachine.OpenSubKey("SOFTWARE\\Microsoft").SubKeyCount <= 0)
            {
                Registry.LocalMachine.DeleteSubKey("SOFTWARE\\Microsoft");
                Registry.LocalMachine.CreateSubKey("SOFTWARE\\Microsoft");
            }
            rk=Registry.LocalMachine.OpenSubKey("SOFTWARE\\Microsoft",true );
            rk.SetValue("123","练习写入注册表");
            MessageBox.Show("写入成功");
            rk.Close();
        }

4注册表的读方法：

 //读取注册表
        private void button2_Click(object sender, EventArgs e)
        {
            try
            {
                RegistryKey rk = null;
                rk = Registry.LocalMachine.OpenSubKey("SOFTWARE\\Microsoft", true);
                if (rk.GetValue("123") != null)
                {
                    richTextBox1.Text = rk.GetValue("123").ToString();
                }
                else
                {
                    MessageBox.Show("没有关键值");
                }
            }
            catch
            { }
        }