注册表应用示例

//测试注册表
        //////////////////////////////////////////////////////////////////////////
        /// <summary>
        /// 读注册表
        /// </summary>
        /// <param name="path">获取路径</param>
        /// <param name="name">要得到的值</param>
        /// <returns>返回注册表指定键值</returns>
        public static string GetRegisterData(string path,string name)
        {
            string registData = "";
            RegistryKey hkml = Registry.CurrentUser;
            RegistryKey software = hkml.OpenSubKey("SOFTWARE", true);
            RegistryKey aimdir = software.OpenSubKey(path, true);
            if (aimdir==null)
            {
                hkml.Close();
                return registData;
            }
            registData = aimdir.GetValue(name).ToString();
            hkml.Close();
            return registData;
        }

        /// <summary>
        /// 写注册表键值
        /// </summary>
        /// <param name="path">获取路径</param>
        /// <param name="name">要设置的名字</param>
        /// <param name="tovalue">要设置的值</param>
        public static void WriteRegister(string path , string name, object tovalue)
        {
            RegistryKey hkml = Registry.CurrentUser;
            RegistryKey software = hkml.OpenSubKey("SOFTWARE", true);
            RegistryKey aimdir = software.CreateSubKey(path);
            aimdir.SetValue(name, tovalue);
            hkml.Close();
        }

        /// <summary>
        /// 删除注册表值
        /// </summary>
        /// <param name="path">获取路径</param>
        /// <param name="name">要删除的值</param>
        public static void DeleteRegister(string path, string name)
        {
            string[] aimnames;
            RegistryKey hkml = Registry.CurrentUser.OpenSubKey("SOFTWARE");
            RegistryKey aimdir = hkml.OpenSubKey(path, true);
            if (aimdir == null)
            {
                hkml.Close();
                return;
            }
            aimnames = aimdir.GetSubKeyNames();
            foreach (string aimKey in aimnames)
            {
                if (aimKey == name)
                {
                    aimdir.DeleteSubKeyTree(name);
                    break;
                }
            }
            hkml.Close();
        }

        /// <summary>
        /// 判断注册表项是否存在
        /// </summary>
        /// <param name="path">获取路径</param>
        /// <param name="name">要查询的值</param>
        /// <returns>返回布尔值</returns>
        public static bool IsRegisterItemExist(string path, string name)
        {
            bool _exit = false;
            string[] subkeyNames;
            RegistryKey hkml = Registry.CurrentUser.OpenSubKey("SOFTWARE");
            RegistryKey aimdir = hkml.OpenSubKey(path, true);
            if (aimdir == null)
            {
                hkml.Close();
                return _exit;
            }
            subkeyNames = aimdir.GetSubKeyNames();
            foreach (string keyName in subkeyNames)
            {
                if (keyName == name)
                {
                    hkml.Close();
                    _exit = true;
                    return _exit;
                }
            }
            hkml.Close();
            return _exit;
        }

        /// <summary>
        /// 判断值是否存在
        /// </summary>
        /// <param name="path">获取路径</param>
        /// <param name="ValueName"></param>
        /// <returns>返回布尔值</returns>
        public static bool IsRegisterValueExit(string path, string ValueName)
        {
            string[] subkeyNames;
            RegistryKey hkml = Registry.CurrentUser.OpenSubKey("SOFTWARE");
            RegistryKey software = hkml.OpenSubKey(path, true);
            if (software == null)
            {
                hkml.Close();
                return false;
            }
            subkeyNames = software.GetValueNames();

            foreach (string keyName in subkeyNames)
            {
                if (keyName == ValueName)  //判断键值的名称
                {
                    hkml.Close();
                    return true;
                }
            }
            hkml.Close();
            return false;
        }

//应用示例

       private void Form1_Load(object sender, EventArgs e)
        {
            //读取VC6
            string sPath = @"Whole TomatoVisual Assist XVA6";
            if (IsRegisterValueExit(sPath, "InstalledDir"))
            {
                textBox1.Text = GetRegisterData(sPath, "InstalledDir");
            }
            else
            {
                textBox1.Text = "不存在键值";
            }
            
            //读取VC2010
            sPath = @"Whole TomatoVisual Assist XVANet10";
            if (IsRegisterValueExit(sPath, "InstalledDir"))
            {
                textBox2.Text = GetRegisterData(sPath, "InstalledDir");
            }
            else
            {
                textBox1.Text = "不存在键值";
            }
        }