/// <summary>
/// 获取串口的全称 
/// </summary>
/// <returns></returns>
public static  List<string> GetCompleteNameOfSerialPort() {
      List<string> serial_port_result = new List<string>();
      Dictionary<string, string> coms = new Dictionary<string, string>();
      try {
          string sql = "select * from Win32_PnPEntity";
          using (ManagementObjectSearcher searcher = new ManagementObjectSearcher(sql)) {
              var hardInfos = searcher.Get();
              if (null != hardInfos) {
                  foreach (var hardInfo in hardInfos) {
                      var hardProperty = hardInfo.Properties;
                      if (null != hardProperty) {
                          PropertyData hardProperty2 = hardProperty["Name"];
                          if (null != hardProperty2) {
                              string hardPropertyValue = (string)hardProperty2.Value;
                              if (!string.IsNullOrWhiteSpace(hardPropertyValue)) {
                                  //是否为串口
                                  string pattern = @"COM\d+";
                                  if (Regex.IsMatch(hardPropertyValue, pattern)) {
                                      Match match = Regex.Match(hardPropertyValue, pattern);
                                      coms.Add(match.Value, hardPropertyValue);
                                  }
                              }
                          }
                      }
                  }
              }
          }


          foreach (string key in coms.Keys) {
              string value = coms[key];
              string listItem = string.Format("{0} {1}", key, value);
              serial_port_result.Add(listItem);
          }


      }
      catch (Exception ex) {

          throw ;
      }
      return serial_port_result;
  }