c# 操作注册表总结

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

namespace ClassLibrary
{
    public class REG
    {
        private static RegistryKey rootkey;

        //构造根键为RootKey的注册表操作类，缺省打开Current_User主键
        public REG(string Rootkey)
        {
            switch(Rootkey.ToUpper())
            {
                case "CLASSES_ROOT":
                    rootkey = Registry.ClassesRoot;
                    break;
                case "CURRENT_USER":
                    rootkey = Registry.CurrentUser;
                    break;
                case "LOCAL_MACHINE":
                    rootkey = Registry.LocalMachine;
                    break;
                case "USERS":
                    rootkey = Registry.Users;
                    break;
                case "CURRENT_CONFIG":
                    rootkey = Registry.CurrentConfig;
                    break;
                case "DYN_DATA":
                    rootkey = Registry.DynData;
                    break;
                case "PERFORMANCE_DATA":
                    rootkey = Registry.PerformanceData;
                    break;
                default:
                    rootkey = Registry.CurrentUser;
                    break;
            }
        }

        // 读取路径为keypath，键名为keyname的注册表键值，缺省返回def
        public string GetRegVal(string keypath,string keyname,string def)
        {
            try
            {
                RegistryKey key = rootkey.OpenSubKey(keypath);
                return key.GetValue(keyname,(object)def).ToString();
            }
            catch
            { return def; }
        }

        //设置路径为keypath，键名为keyname的注册表键值为keyval
        public bool SetRegVal(string keypath,string keyname,string keyval)
        {
            try
            {
                RegistryKey key = rootkey.OpenSubKey(keypath);
                key.SetValue(keyname,(object)keyval);
                return true;
            }
            catch { return false; }
        }

        //创建路径为keypath的键
        public RegistryKey CreateRegKey(string keypath)
        {
            try { return rootkey.CreateSubKey(keypath); }
            catch { return null; }
        }

        //删除路径为keypath的子项
        public bool DelRegSubKey(string keypath)
        {
            try
            {
                rootkey.DeleteSubKey(keypath);
                return true;
            }
            catch { return false; }
        }
        //删除路径为keypath的子项及其附属子项
        public bool DelRegSubKeyTree(string keypath)
        {
            try
            {
                rootkey.DeleteSubKeyTree(keypath);
                return true;
            }
            catch
            {
                return false;
            }
        }
        //删除路径为keypath下键名为keyname的键值
        public bool DelRegKeyVal(string keypath,string keyname)
        {
            try
            {
                RegistryKey key = rootkey.OpenSubKey(keypath);
                key.DeleteValue(keyname);
                return true;
            }
            catch
            {
                return false;
            }
        }
    }
}