using System;

using System.Diagnostics;

using Microsoft.Win32;

namespace ChuckLu.Utility

{

    public class Cmd

    {

        private Cmd()

        {

        }

        private static readonly Cmd instance = new Cmd();

        public static Cmd Instance

        {

            get { return instance; }

        }

        private string regsvr32 = "regsvr32 -s {0}";//-s 参数指定 regsvr32 安静运行，在成功注册/反注册DLL文件的前提下不显示结果提示框。

        public void Regsvr32(string fileName)

        {

            string strcmd = string.Format(regsvr32, fileName);

            Execute(strcmd);

        }

        /// <summary>

        /// 使用cmd执行命令

        /// </summary>

        /// <param name="strCmd"></param>

        /// <returns></returns>

        private void Execute(string strCmd)

        {

            ProcessStartInfo processStartInfo = new ProcessStartInfo()

            {

                FileName = "cmd.exe",

                UseShellExecute = false,

                RedirectStandardOutput = false,

                CreateNoWindow = true,

                Arguments = "/c " + strCmd

            };

            Process myProcess = new Process()

            {

                StartInfo = processStartInfo

            };

            myProcess.Start();

            myProcess.Close();

        }

        /// <summary>

        /// COM组件是否已经被注册

        /// </summary>

        /// <param name="clsid"></param>

        /// <returns></returns>

        public bool IsRegistered(String clsid)

        {

            //参数检查

            Debug.Assert(!String.IsNullOrEmpty(clsid), "clsid 不应该为空");

            //设置返回值

            Boolean result = false;

            //检查方法，查找注册表是否存在指定的clsid

            String key = String.Format(@"CLSID\{{{0}}}", clsid);

            RegistryKey regKey = Registry.ClassesRoot.OpenSubKey(key);

            if (regKey != null)

            {

                result = true;

            }

            return result;

        }

        /// <summary>

        /// 反注册

        /// </summary>

        /// <param name="file"></param>

        /// <returns></returns>

        public Boolean UnRegister(String file)

        {

            //参数检查

            Debug.Assert(!String.IsNullOrEmpty(file), "file 不应该为空");

            //设置返回值

            Boolean result = false;

            //检查方法，查找注册表是否存在指定的clsid

            string fileFullName = "\"" + file + "\"";

            Process p = Process.Start("regsvr32", fileFullName + " /s /u");

            if (p != null && p.HasExited)

            {

                Int32 exitCode = p.ExitCode;

                if (exitCode == )

                {

                    result = true;

                }

            }

            return result;

        }

    }

}