C#简单注册表操作实例

1.简介操作

        //设置注册值
        private void Button_Click(object sender, RoutedEventArgs e)
        {
            //路径及间隔符号要正确
            //1.如果指定路径不存在，则创建
            //2.如果指定键存在，则覆盖值
            string path = "HKEY_CURRENT_USER\myRegOne";
            Registry.SetValue(path, "Expend", "hellow world!");

            MessageBox.Show("设置成功");
        }
        //获取指定路径的键对应的值
        private void Button_Click_1(object sender, RoutedEventArgs e)
        {
            //如果不存在则报错
            //1.如果指定路径不存在，获取的结果为null
            string path = "HKEY_CURRENT_USER\myRegOne";
            object result = Registry.GetValue(path, "Version", 1.0);

            lblOne.Content = result.ToString();
        }

2.项操作：

       //创建项
        private void Button_Click(object sender, RoutedEventArgs e)
        {
            RegistryKey lm = Registry.CurrentUser;
            //打开myRegOne
            RegistryKey myRegOne = lm.OpenSubKey("myRegOne", true);//指定是否具有写权限

            if (myRegOne != null)
            {
                //新建子项,如果存在则覆盖
                RegistryKey mySubKey = myRegOne.CreateSubKey("mySubKey_Three", RegistryKeyPermissionCheck.ReadWriteSubTree);
                MessageBox.Show("创建成功!");
            }
            else
            {
                myRegOne = lm.CreateSubKey("myRegOne", RegistryKeyPermissionCheck.ReadWriteSubTree);
            }
            myRegOne.Close();
        }

        //打开项
        private void Button_Click_1(object sender, RoutedEventArgs e)
        {
            RegistryKey lm = Registry.CurrentUser;
            //打开
            RegistryKey myRegOne = lm.OpenSubKey("myRegOne");

            //获取所有的项
            string[] subKeyNames = myRegOne.GetSubKeyNames();
            listSubKey.Items.Clear();
            foreach (var item in subKeyNames)
            {
                listSubKey.Items.Add(item);
            }


            //获取所有的键值
            string[] valueNames = myRegOne.GetValueNames();
            listNameValue.Items.Clear();
            foreach (var item in valueNames)
            {
                listNameValue.Items.Add(item + "---" + myRegOne.GetValue(item, "没有设置值"));
            }

            myRegOne.Close();
        }


        //删除项
        private void Button_Click_2(object sender, RoutedEventArgs e)
        {
            RegistryKey cu = Registry.CurrentUser;
            RegistryKey myRegOne = cu.OpenSubKey("myRegOne", true);//指定是否具有写权限

            //删除,指定如果操作失败时是否抛出异常
            myRegOne.DeleteSubKey("mySubKey_Three", false);
            myRegOne.Close();
            MessageBox.Show("删除成功!");
        }

        //判断项是否存在
        private void Button_Click_3(object sender, RoutedEventArgs e)
        {
            RegistryKey cu = Registry.CurrentUser;
            //打开项
            RegistryKey myRegOne = cu.OpenSubKey("myRegOne");
            if (myRegOne != null)
            {
                MessageBox.Show("指定项'myRegOne'存在!");
            }
        }

3.值操作：

        //设置或新建值
        private void Button_Click(object sender, RoutedEventArgs e)
        {
            RegistryKey cu = Registry.CurrentUser;
            //打开项,指定写权限
            RegistryKey myRegOne = cu.OpenSubKey("myRegOne", true);
            if (myRegOne != null)
            {
                //创建项,如果存在则覆盖
                myRegOne.SetValue("Version", "1.23");
                myRegOne.SetValue("Enable", 1, RegistryValueKind.DWord);
                myRegOne.SetValue("Expend", "hello world!", RegistryValueKind.ExpandString);
                MessageBox.Show("设置值成功");
            }
            cu.Close();
        }

        //读取值
        private void Button_Click_1(object sender, RoutedEventArgs e)
        {
            RegistryKey cu = Registry.CurrentUser;
            //打开项
            RegistryKey myRegOne = cu.OpenSubKey("myRegOne", true);
            if (myRegOne != null)
            {
                string[] names = myRegOne.GetValueNames();
                listOne.Items.Clear();
                foreach (var item in names)
                {
                    listOne.Items.Add(item + "----" + myRegOne.GetValue(item));
                }
            }
            cu.Close();
        }

        //删除值
        private void Button_Click_2(object sender, RoutedEventArgs e)
        {
            RegistryKey cu = Registry.CurrentUser;
            //打开项,指定写权限
            RegistryKey myRegOne = cu.OpenSubKey("myRegOne", true);
            if (myRegOne != null)
            {
                myRegOne.DeleteValue("Expend");
                MessageBox.Show("删除成功!");
            }
            cu.Close();
        }
        //判断值是否存在
        private void Button_Click_3(object sender, RoutedEventArgs e)
        {
            RegistryKey cu = Registry.CurrentUser;
            //打开项
            RegistryKey myRegOne = cu.OpenSubKey("myRegOne");
            if (myRegOne != null)
            {
                if (myRegOne.GetValue("Expend") != null)
                {
                    MessageBox.Show("该值存在");
                }
            }
        }