apewer-dotnet/Apewer.Windows/Internals/RegistryHelper.cs

using Microsoft.Win32;
using System;
using System.IO;
using System.Windows.Forms;

namespace Apewer.Internals
{

    /// <summary>注册表。</summary>
    static class RegistryHelper
    {

        /// <summary>用户登录后的启动项。</summary>
        const string Run = @"Software\Microsoft\Windows\CurrentVersion\Run";

        /// <summary>HKEY_CURRENT_USER</summary>
        /// <remarks>当前用户的信息。</remarks>
        public static RegistryKey CurrentUser { get => Registry.CurrentUser; }

        /// <summary>HKEY_LOCAL_MACHINE</summary>
        /// <remarks>系统信息，对所有用户生效，设置需要管理员权限。</remarks>
        public static RegistryKey LocalMachine { get => Registry.LocalMachine; }

        /// <summary>获取值。</summary>
        /// <param name="root">注册表存储区。</param>
        /// <param name="key">路径。</param>
        /// <param name="name">名称。</param>
        /// <returns>值。获取失败时返回 NULL 值。</returns>
        public static object Get(RegistryKey root, string key, string name)
        {
            try
            {
#if !NET20
                using
#endif
                var rkey = root.OpenSubKey(key, RegistryKeyPermissionCheck.ReadSubTree);
                var names = rkey.GetValueNames();
                if (names.Contains(name))
                {
                    var value = rkey.GetValue(name, null);
                    return value;
                }
            }
            catch { }
            return null;
        }

        /// <summary>获取字符串。</summary>
        /// <param name="root">注册表存储区。</param>
        /// <param name="key">路径。</param>
        /// <param name="name">名称。</param>
        /// <returns>字符串的值。获取失败时返回 NULL 值。</returns>
        public static string GetString(RegistryKey root, string key, string name) => Get(root, key, name) as string;

        /// <summary>设置字符串，指定 value 为 NULL 可删除该值。</summary>
        /// <param name="root">注册表存储区。</param>
        /// <param name="key">路径。</param>
        /// <param name="name">名称。</param>
        /// <param name="value">值。</param>
        /// <returns>错误信息。设置成功时返回 NULL 值。</returns>
        public static string Set(RegistryKey root, string key, string name, string value)
        {
            try
            {
#if !NET20
                using
#endif
                var rkey = root.OpenSubKey(key, RegistryKeyPermissionCheck.ReadWriteSubTree);
                var apps = rkey.GetSubKeyNames();
                if (value.IsEmpty()) rkey.DeleteValue(name, true);
                else rkey.SetValue(name, value, RegistryValueKind.String);
                return null;
            }
            catch (Exception ex)
            {
                return ex.Message;
            }
        }

        /// <summary>设置当前用户的启动项。</summary>
        /// <remarks>错误消息。</remarks>
        public static void SetRun(string name, string command)
        {
            var old = GetString(CurrentUser, Run, name);
            if (old.IsEmpty()) Set(CurrentUser, Run, name, command);
        }

        /// <summary>取消当前用户的启动项。</summary>
        /// <remarks>错误消息。</remarks>
        public static void CancelRun(string name)
        {
            Set(CurrentUser, Run, name, null);
        }

        /// <summary>已启用自动启动。</summary>
        public static bool UserAutoRun
        {
            get
            {
                var path = Application.ExecutablePath;
                var name = Path.GetFileNameWithoutExtension(path);
                var value = GetString(CurrentUser, Run, name);
                return value == path;
            }
            set
            {
                var path = Application.ExecutablePath;
                var name = Path.GetFileNameWithoutExtension(path);
                Set(CurrentUser, Run, name, value ? path : null);
            }
        }

    }

}