1         public enum HardwareEnum
 2         {
 3             Win32_PnPEntity, // 所有设备
 4         }
 5 
 6         /// <summary>
 7         /// 获取相应COM口号
 8         /// </summary>
 9         private static string getComInfo(HardwareEnum hardType, string propkey)
10         {
11             List<string> deviceslist = new List<string>();
12             StringBuilder comsb = new StringBuilder();
13 
14             try
15             {
16                 using (ManagementObjectSearcher searcher = new ManagementObjectSearcher("select *from " + hardType))
17                 {
18                     var hardInfos = searcher.Get();
19                     foreach (var hardInfo in hardInfos)
20                     {
21 
22                         if (hardInfo.Properties[propkey].Value.ToString().Contains("COM"))
23                         {
24                             deviceslist.Add(hardInfo.Properties[propkey].Value.ToString());
25                         }
26                     }
27                     searcher.Dispose();
28                 }
29                 string[] devicestemps = deviceslist.ToArray();
30 
31                 foreach (string device in devicestemps)
32                 {
33                     if (device.Contains("AT")) //这里短信猫需操作AT口
34                     {
35                         int index = device.IndexOf("(");
36                         string devicetemp = device.Substring(index + 1); //得到形如"COM3）"形式
37                         string comnum = devicetemp.Substring(3, devicetemp.Length - 4); //直接得到相应COM端口号
38                         comsb.Append(comnum + "*");  //用“*”号隔开，当出现多个的时候
39                     }
40                 }
41 
42                 string comsbstring=comsb.ToString();
43                 return comsbstring.Substring(0, comsbstring.Length - 1); //移除最后一个“*”号
44 
45             }
46             catch
47             {
48                 return null;
49             }
50             finally
51             {
52                 deviceslist = null;
53             }
54 
55         }
56 
57         /// <summary>
58         /// 获取COM端口号
59         /// </summary>
60         public static string getComNum()
61         {
62             string comnums = getComInfo(HardwareEnum.Win32_PnPEntity, "name");
63 
64             return comnums; //返回多个COM号的组成，可在这里进行解析，也可在调用时进行解析，这里不做过多赘述
65         }