C#操作注册表的方法

const string KeyName = "HKEY_CURRENT_USER\\Example";
Registry.SetValue(keyName, "", 5280);//默认名称
Registry.SetValue(keyName, "TestLong", 1234567, RegistryValueKind.QWord);
int i = (int)Registry.GetValue(keyName, "", -1);//默认值
long l = (long)Registry.GetValue(keyName, "TestLong", long.MinValue);

//使用CreateSubKey()在SOFTWARE下创建子项test
RegistryKey hklm = Registry.LocalMachine;
RegistryKey hkSoftWare = hklm.CreateSubKey(@"SOFTWARE\test");
hklm.Close();
hkSoftWare.Close();

//使用OpenSubKey()打开项，获得RegistryKey对象，当路径不存在时，为Null。第二个参数为true，表示可写，可读，可删；省略时只能读。
RegistryKey hklm = Registry.LocalMachine;
RegistryKey hkSoftWare = hklm.OpenSubKey(@"SOFTWARE\test",true);
hklm.Close();
hkSoftWare.Close();

//主要用到了DeleteSubKey(),删除test项
RegistryKey hklm = Registry.LocalMachine;
hklm.DeleteSubKey(@"SOFTWARE\test", true);  //为true时，删除的注册表不存在时抛出异常；当为false时不抛出异常。
hklm.Close();

//主要用到了SetValue()，表示在test下创建名称为Name，值为RegistryTest的键值。第三个参数表示键值类型，省略时，默认为字符串
RegistryKey hklm = Registry.LocalMachine;
RegistryKey hkSoftWare = hklm.OpenSubKey(@"SOFTWARE\test",true);
hkSoftWare.SetValue("Name", "RegistryTest", RegistryValueKind.String);
hklm.Close();
hkSoftWare.Close();

//主要用到了GetValue(),获得名称为"Name"的键值
RegistryKey hklm = Registry.LocalMachine;
RegistryKey hkSoftWare = hklm.OpenSubKey(@"SOFTWARE\test", true);
string sValue = hkSoftWare.GetValue("Name").ToString();
hklm.Close();
hkSoftWare.Close();

//主要用到了DeleteValue(),表示删除名称为"Name"的键值，第二个参数表示是否抛出异常
RegistryKey hklm = Registry.LocalMachine;
RegistryKey hkSoftWare = hklm.OpenSubKey(@"SOFTWARE\test", true);
hkSoftWare.DeleteValue("Name", true);
hklm.Close();
hkSoftWare.Close();

        //判断注册表项是否存在
        private bool IsRegistryKeyExist(string sKeyName)
        {
            string[] sKeyNameColl;
            RegistryKey hklm = Registry.LocalMachine;
            RegistryKey hkSoftWare = hklm.OpenSubKey(@"SOFTWARE");
            sKeyNameColl = hkSoftWare.GetSubKeyNames(); //获取SOFTWARE下所有的子项
            foreach (string sName in sKeyNameColl)
            {
                if (sName == sKeyName)
                {
                    hklm.Close();
                    hkSoftWare.Close();
                    return true;
                }
            }
            hklm.Close();
            hkSoftWare.Close();
            return false;
        }


        //判断键值是否存在
        private bool IsRegistryValueNameExist(string sValueName)
        {
            string[] sValueNameColl;
            RegistryKey hklm = Registry.LocalMachine;
            RegistryKey hkTest = hklm.OpenSubKey(@"SOFTWARE\test");
            sValueNameColl = hkTest.GetValueNames(); //获取test下所有键值的名称
            foreach (string sName in sValueNameColl)
            {
                if (sName == sValueName)
                {
                    hklm.Close();
                    hkTest.Close();
                    return true;
                }
            }
            hklm.Close();
            hkTest.Close();
            return false;
        }

//开启程序自启动
string path = Application.ExecutablePath;
RegistryKey rk = Registry.LocalMachine;
RegistryKey rk2 = rk.CreateSubKey(@"Software\Microsoft\windows\CurrentVersion\Run");
rk2.SetValue("JcShutdown", path);
rk2.Close();
rk.Close();

//关闭程序自启动
string path = Application.ExecutablePath;
RegistryKey rk = Registry.LocalMachine;
RegistryKey rk2 = rk.CreateSubKey(@"Software\Microsoft\Windows\CurrentVersion\Run");
rk2.DeleteValue("JcShutdown", false);
rk2.Close();
rk.Close();

RegistryKey baseKey = RegistryKey.OpenRemoteBaseKey(RegistryHive.LocalMachine,"192.168.0.2");
RegistryKey softwareKey = key.OpenSubKey("software\\test");
softwareKey.Close();
baseKey.Close();