C#获取mac
验证计算机MAC地址进行软件授权是一种通用的方法，C#可以轻松获取计算机的MAC地址，本文采用实际的源代码讲述了两种获取网卡的方式，第一种 方法使用ManagementClass类，只能获取本机的计算机网卡物理地址，第二种方法使用Iphlpapi.dll的SendARP方法，可以获取 本机和其它计算机的MAC地址。
方法1：使用ManagementClass类
示例：
/// <summary> /// 获取网卡物理地址 /// </summary> /// <returns></returns> public static string getMacAddr_Local() { string madAddr = null; ManagementClass mc = new ManagementClass("Win32_NetworkAdapterConfiguration"); ManagementObjectCollection moc2 = mc.GetInstances(); foreach (ManagementObject mo in moc2) { if (Convert.ToBoolean(mo["IPEnabled"]) == true) { madAddr = mo["MacAddress"].ToString(); madAddr = madAddr.Replace(':', '-'); } mo.Dispose(); } return madAddr; }
说明：
1.需要给项目增加引用：System.Management
2.在程序开始添加包引入语句：using System.Management；
3.本方案只能获取本机的MAC地址；
方法2：使用SendARP类
示例：
//下面一种方法可以获取远程的MAC地址 [DllImport("Iphlpapi.dll")] static extern int SendARP(Int32 DestIP, Int32 SrcIP, ref Int64 MacAddr, ref Int32 PhyAddrLen); [DllImport("Ws2_32.dll")] static extern Int32 inet_addr(string ipaddr); /// <summary> /// SendArp获取MAC地址 /// </summary> /// <param name="RemoteIP">目标机器的IP地址如(192.168.1.1)</param> /// <returns>目标机器的mac 地址</returns> public static string getMacAddr_Remote(string RemoteIP) { StringBuilder macAddress = new StringBuilder(); try { Int32 remote = inet_addr(RemoteIP); Int64 macInfo = new Int64(); Int32 length = 6; SendARP(remote, 0, ref macInfo, ref length); string temp = Convert.ToString(macInfo, 16).PadLeft(12, '0').ToUpper(); int x = 12; for (int i = 0; i < 6; i++) { if (i == 5) { macAddress.Append(temp.Substring(x - 2, 2)); } else { macAddress.Append(temp.Substring(x - 2, 2) + "-"); } x -= 2; } return macAddress.ToString(); } catch { return macAddress.ToString(); } }
说明：
1.在程序开始添加包引入语句：using System.Runtime.InteropServices;
2.该方法可以获取远程计算机的MAC地址；
刚开始在机房推广我们组的系统，用户注册就失效了，debug了许久之后，发现居然是一直都在使用的获得MAC的地址的方法居然失效了——数据库报异常，以MAC为主键的表提示主键重复了
，怎么可能啊？就好像GUID重复一样！！！！
对原来获得MAC的地址的代码做了测试，才发现在我机子居然运行的结果和在cmd下ipconfig的结果不同
，仅是一个vm的mac。源码如下：
string MacAddress; //设置MAC地址 string MAC=""; ManagementClass MC = new ManagementClass ( "Win32_NetworkAdapterConfiguration" ); ManagementObjectCollection MOC = MC.GetInstances(); foreach ( ManagementObject moc in MOC ) { if ( moc["IPEnabled"].ToString() == "True") { MAC = moc["MacAddress"].ToString(); } } MacAddress=MAC;
经过在网络上寻找，找到了获得本机mac的方法，只是结果是一个ArrayList，运行的结果和cmd下命令一样，只是包括了一个真的mac和两个vm的mac，源码如下：
using System.Management; using System.Runtime.InteropServices; using System.Text; using System.Text.RegularExpressions; string strsearch=string.Format(@"SELECT MACAddress FROM Win32_NetworkAdapter WHERE ((MACAddress Is Not NULL)AND (Manufacturer <> 'Microsoft'))"); System.Management.ManagementObjectSearcher msearch=new ManagementObjectSearcher(); msearch.Scope=new ManagementScope(@"root/CIMV2"); msearch.Query=new ObjectQuery(strsearch); ArrayList MacList =new ArrayList(); int i =0; try { if((msearch.Get().Count<1) || (msearch.Get()==null)) { MessageBox.Show("No MAC Address!"); } else { MessageBox.Show("MAC Address No. is : "+ msearch.Get().Count.ToString()); foreach(System.Management.ManagementObject mymac in msearch.Get()) { string str1=string.Format("MAC{0} address:{1}",i.ToString(),mymac["MACAddress"].ToString()); MessageBox.Show("MAC Address "+i.ToString()+":"+str1); MacList.Add(str1); i++; } } } catch(Exception ex) { string msg=ex.Message.ToString(); MessageBox.Show("erro", msg); }
由于没有办法确定获得mac那个真实的，所以又用了第三个方法，通过IP地址获得mac：
using System.Management; using System.Runtime.InteropServices; using System.Text; using System.Text.RegularExpressions; [DllImport("Iphlpapi.dll")] private static extern int SendARP(Int32 dest,Int32 host,ref Int32 mac,ref Int32 length); [DllImport("Ws2_32.dll")] private static extern Int32 inet_addr(string ip); string IPAddress=System.Net.Dns.GetHostByName(System.Net.Dns.GetHostName()).AddressList[0].ToString(); MessageBox.Show("ip: "+IPAddress); string mac = this.GetMACFromIP(IPAddress); MessageBox.Show("mac: "+mac); private string GetMACFromIP(string A_strIP) { string strRet = "Unknown"; string strIPPattern = @"^/d+/./d+/./d+/./d+$"; Regex objRex =new Regex(strIPPattern); if(objRex.IsMatch(A_strIP) == true) { Int32 intDest = inet_addr(A_strIP); Int32 [] arrMAC = new Int32[2]; Int32 intLen = 6; int intResult = SendARP(intDest,0,ref arrMAC[0],ref intLen); if(intResult == 0) { Byte [] arrbyte = new Byte[8]; arrbyte[5] = (Byte)(arrMAC[1] >> 8); arrbyte[4] = (Byte)arrMAC[1]; arrbyte[3] = (Byte)(arrMAC[0] >> 24); arrbyte[2] = (Byte)(arrMAC[0] >> 16); arrbyte[1] = (Byte)(arrMAC[0] >> 8); arrbyte[0] = (Byte)arrMAC[0]; StringBuilder strbMAC = new StringBuilder(); for(int intIndex = 0 ;intIndex < 6;intIndex ++) { if(intIndex > 0) strbMAC.Append("-"); strbMAC.Append(arrbyte[intIndex].ToString("X2")); } strRet = strbMAC.ToString(); } } return strRet; }