在做B/S结构的系统时，我们常常需要获取客户端的一些信息，如IP和MAC，以结合身份验证。在ASP.NET中,要获取服务器端的MAC很容易，但是要获取客户端的MAC的地址确要花费一翻心思，通常的做法是调用Win32API或直接调用nbtstat命令，这样做有很多问题，而另一种方法就是直接用客户端脚本，我们这里用Javascript，这样做的好处是不需要服务器端进行处理，有客户端自行获取，传递到服务器端，且速度和可靠性都比在服务器端获取好。
具体实现的html和javascript如下：
<
HTML
><
HEAD
><
TITLE
>
WMI Scripting HTML
</
TITLE
>
< META http-equiv =Content-Type content ="text/html; charset=gb2312" >
< SCRIPT language =JScript event ="OnCompleted(hResult,pErrorObject, pAsyncContext)" for =foo >
document.forms[ 0 ].txtMACAddr.value = unescape(MACAddr);
document.forms[ 0 ].txtIPAddr.value = unescape(IPAddr);
document.forms[ 0 ].txtDNSName.value = unescape(sDNSName);
// document.formbar.submit();
</ SCRIPT >
< SCRIPT language =JScript event =OnObjectReady(objObject,objAsyncContext) for =foo >
if (objObject.IPEnabled != null && objObject.IPEnabled != " undefined " && objObject.IPEnabled == true )
{
if (objObject.MACAddress != null && objObject.MACAddress != " undefined " )
MACAddr = objObject.MACAddress;
if (objObject.IPEnabled && objObject.IPAddress( 0 ) != null && objObject.IPAddress( 0 ) != " undefined " )
IPAddr = objObject.IPAddress( 0 );
if (objObject.DNSHostName != null && objObject.DNSHostName != " undefined " )
sDNSName = objObject.DNSHostName;
}
</ SCRIPT >
< META content ="MSHTML 6.00.2800.1106" name =GENERATOR ></ HEAD >
< BODY >
< OBJECT id =locator classid =CLSID:76A64158-CB41-11D1-8B02-00600806D9B6 VIEWASTEXT ></ OBJECT >
< OBJECT id =foo classid =CLSID:75718C9A-F029-11d1-A1AC-00C04FB6C223 ></ OBJECT >
< SCRIPT language =JScript >
var service = locator.ConnectServer();
var MACAddr ;
var IPAddr ;
var DomainAddr;
var sDNSName;
service.Security_.ImpersonationLevel = 3 ;
service.InstancesOfAsync(foo, 'Win32_NetworkAdapterConfiguration');
</ SCRIPT >
< FORM id =formfoo name =formbar action =NICPost.asp method =post >< INPUT value =00:05:5D:0E:C7:FA name =txtMACAddr > < INPUT value =192.168.0.2 name =txtIPAddr > < INPUT value =typ name =txtDNSName > </ FORM ></ BODY ></ HTML >
< META http-equiv =Content-Type content ="text/html; charset=gb2312" >
< SCRIPT language =JScript event ="OnCompleted(hResult,pErrorObject, pAsyncContext)" for =foo >
document.forms[ 0 ].txtMACAddr.value = unescape(MACAddr);
document.forms[ 0 ].txtIPAddr.value = unescape(IPAddr);
document.forms[ 0 ].txtDNSName.value = unescape(sDNSName);
// document.formbar.submit();
</ SCRIPT >
< SCRIPT language =JScript event =OnObjectReady(objObject,objAsyncContext) for =foo >
if (objObject.IPEnabled != null && objObject.IPEnabled != " undefined " && objObject.IPEnabled == true )
{
if (objObject.MACAddress != null && objObject.MACAddress != " undefined " )
MACAddr = objObject.MACAddress;
if (objObject.IPEnabled && objObject.IPAddress( 0 ) != null && objObject.IPAddress( 0 ) != " undefined " )
IPAddr = objObject.IPAddress( 0 );
if (objObject.DNSHostName != null && objObject.DNSHostName != " undefined " )
sDNSName = objObject.DNSHostName;
}
</ SCRIPT >
< META content ="MSHTML 6.00.2800.1106" name =GENERATOR ></ HEAD >
< BODY >
< OBJECT id =locator classid =CLSID:76A64158-CB41-11D1-8B02-00600806D9B6 VIEWASTEXT ></ OBJECT >
< OBJECT id =foo classid =CLSID:75718C9A-F029-11d1-A1AC-00C04FB6C223 ></ OBJECT >
< SCRIPT language =JScript >
var service = locator.ConnectServer();
var MACAddr ;
var IPAddr ;
var DomainAddr;
var sDNSName;
service.Security_.ImpersonationLevel = 3 ;
service.InstancesOfAsync(foo, 'Win32_NetworkAdapterConfiguration');
</ SCRIPT >
< FORM id =formfoo name =formbar action =NICPost.asp method =post >< INPUT value =00:05:5D:0E:C7:FA name =txtMACAddr > < INPUT value =192.168.0.2 name =txtIPAddr > < INPUT value =typ name =txtDNSName > </ FORM ></ BODY ></ HTML >
关键是用到两个ActiveX：
<OBJECT id=locator classid=CLSID:76A64158-CB41-11D1-8B02-00600806D9B6 VIEWASTEXT></OBJECT>
<OBJECT id=foo classid=CLSID:75718C9A-F029-11d1-A1AC-00C04FB6C223></OBJECT>
不过这两个ActiveX都是系统自带，不用去下载或注册。
接下来的工作就是用脚本和ActiveX交互，脚本可以是js或Vbs我个人喜欢用js。