using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Microsoft.Win32;namespace TagReceiver
{class RegistryHelper{/// <summary>/// 读取指定名称的注册表的值/// </summary>/// <param name="name"></param>/// <returns></returns>public string GetRegistryData(RegistryKey root, string subkey, string name) { string registData = ""; RegistryKey myKey = root.OpenSubKey(subkey, true);if (myKey != null){registData = myKey.GetValue(name).ToString();}return registData; } /// <summary>/// 向注册表中写数据/// </summary>/// <param name="name"></param>/// <param name="tovalue"></param> public void SetRegistryData(RegistryKey root, string subkey, string name, string value) { RegistryKey aimdir = root.CreateSubKey(subkey); aimdir.SetValue(name, value); } /// <summary>/// 删除注册表中指定的注册表项/// </summary>/// <param name="name"></param>public void DeleteRegist(RegistryKey root, string subkey, string name) { string[] subkeyNames;RegistryKey myKey = root.OpenSubKey(subkey, true);subkeyNames = myKey.GetSubKeyNames();foreach (string aimKey in subkeyNames) { if(aimKey == name)myKey.DeleteSubKeyTree(name); } } /// <summary>/// 判断指定注册表项是否存在/// </summary>/// <param name="name"></param>/// <returns></returns>public bool IsRegistryExist(RegistryKey root, string subkey, string name) { bool _exit = false; string[] subkeyNames; RegistryKey myKey = root.OpenSubKey(subkey, true);subkeyNames = myKey.GetSubKeyNames(); foreach(string keyName in subkeyNames) { if(keyName == name) { _exit = true; return _exit; } } return _exit; } }
}

读注册表：RegistryHelper rh = new RegistryHelper();string portName = rh.GetRegistryData(Registry.LocalMachine, "SOFTWARE\\TagReceiver\\Params\\SerialPort", "PortName");
写注册表：RegistryHelper rh = new RegistryHelper();rh.SetRegistryData(Registry.LocalMachine, "SOFTWARE\\TagReceiver\\Params\\SerialPort", "PortName", portName);