c# 通過檢視登錄檔的方式來判斷電腦安裝office的版本

  private void button3_Click(object sender, EventArgs e)
        {
            if (panduan())//自定義方法
            {
                MessageBox.Show("本機已安裝office2010");
            }
            else
            {
                MessageBox.Show("請先安裝wps 2012", "警告", MessageBoxButtons.OK, MessageBoxIcon.Warning);
            }
        }

 public bool panduan()
        {
            bool ifused = false;
            RegistryKey rk = Registry.LocalMachine;
            RegistryKey office2010 = rk.OpenSubKey(@"SOFTWARE\\Microsoft\\Office\\14.0\\Word\\InstallRoot\\");
            //office 2003
            RegistryKey office2003 = rk.OpenSubKey(@"SOFTWARE\\Microsoft\\Office\\11.0\\Word\\InstallRoot\\");
            //office2007
            RegistryKey office2007 = rk.OpenSubKey(@"SOFTWARE\\Microsoft\\Office\\12.0\\Word\\InstallRoot\\");
            //office 97
            RegistryKey office97 = rk.OpenSubKey(@"SOFTWARE\\Microsoft\\Office\\8.0\\Word\\InstallRoot\\");
            //office 2000
            RegistryKey office2000 = rk.OpenSubKey(@"SOFTWARE\\Microsoft\\Office\\9.0\\Word\\InstallRoot\\");
            //office xp
            RegistryKey officexp = rk.OpenSubKey(@"SOFTWARE\\Microsoft\\Office\\10.0\\Word\\InstallRoot\\");
            //檢查本機是否安裝Office2010
            if (office2010 != null)
            {
                string file03 = office2010.GetValue("Path").ToString();
                if (File.Exists(file03 + "Excel.exe"))
                {
                    istrue= true;
                }
            }
            if (officexp != null)
            {
                string filexp = officexp.GetValue("Path").ToString();
                if (File.Exists(filexp + "Excel.exe"))
                {
                    istrue= false;
                }
            }
            if (office2000 != null)
            {
                string file2000 = officexp.GetValue("Path").ToString();
                if (File.Exists(file2000 + "Excel.exe"))
                {
                    istrue= false;
                }
            }
            if (office97 != null)
            {
                string file97 = officexp.GetValue("Path").ToString();
                if (File.Exists(file97 + "Excel.exe"))
                {
                    istrue= false;
                }
            }
            if (office2007 != null)
            {
                string file2007 = officexp.GetValue("Path").ToString();
                if (File.Exists(file2007 + "Excel.exe"))
                {
                    istrue= false;
                }
            }
  
            return istrue;
        }