获取MAC地址的两种方法,一种可以跨vlan取得MAC

只接上代码.大家都看得明白的,(VB.net),函数中的内容理解不了没关系,牛人多的是,咱们只要会用就行啦!

Imports System.Diagnostics
Partial Class Other_MAC
Inherits System.Web.UI.Page
Private Declare Ansi Function SendARP Lib "Iphlpapi.dll" (ByVal dest As Int32, ByVal host As Int32, ByRef mac As Int64, ByRef length As Int32) As Int32
    Private Declare Ansi Function inet_addr Lib "Ws2_32.dll" (ByVal IP As String) As Int32
    ''' <summary>
    ''' 用于得到MAC地址,速度快,但无法跨VLAN.
    ''' </summary>
    ''' <param name="RemoteIp"></param>
    ''' <returns></returns>
    ''' <remarks></remarks>
    Public Function GetMAC(ByVal RemoteIp As String) As String
        Dim Dest As Int32 = inet_addr(RemoteIp)
        Dim Str As String = String.Empty
        Dim StrMac As String = String.Empty
        Try
            Dim MacInfo As New Int64
            Dim Len As Int32 = 6
            Dim Res As Integer = SendARP(Dest, 0, MacInfo, Len)
            Str = Convert.ToString(MacInfo, 16).ToUpper
            If Str.Length = 12 Then
                Dim M(5) As String
                M(0) = Str.Substring(10, 2)
                M(1) = Str.Substring(8, 2)
                M(2) = Str.Substring(6, 2)
                M(3) = Str.Substring(4, 2)
                M(4) = Str.Substring(2, 2)
                M(5) = Str.Substring(0, 2)
                StrMac = String.Format("{0}-{1}-{2}-{3}-{4}-{5}", M(0), M(1), M(2), M(3), M(4), M(5))
            Else
                StrMac = "没有查询到MAC."
            End If
        Catch ex As Exception
            Return String.Format("Get Error. 原因:{0}", ex.Message)
        End Try
        Return StrMac
    End Function
    ''' <summary>
    ''' 用于得到MAC地址,速度慢,可以跨VLAN取得MAC地址
     ''' </summary>
    ''' <param name="IP">IP地址</param>
    ''' <param name="name">无意义,任何字符串值</param>
    ''' <returns></returns>
    ''' <remarks></remarks>
    Private Function GetMac(ByVal IP As String, ByVal name As String) As String
        Dim dirResults As String = ""
        Dim psi As New ProcessStartInfo()
        Dim proc As New Process()
        psi.FileName = "nbtstat"
        psi.RedirectStandardInput = False
        psi.RedirectStandardOutput = True
        psi.Arguments = "-A " & IP
        psi.UseShellExecute = False
        proc = Process.Start(psi)
        dirResults = proc.StandardOutput.ReadToEnd()
        proc.WaitForExit()
        dirResults = dirResults.Replace(vbCr, "").Replace(vbLf, "").Replace(vbTab, "")
        Dim reg As New Regex("Mac[ ]{0,}Address[ ]{0,}=[ ]{0,}(?<key>((.)*?))__MAC", RegexOptions.IgnoreCase Or RegexOptions.Compiled)
        Dim mc As Match = reg.Match(dirResults & "__MAC")
        If mc.Success Then
            Return mc.Groups("key").Value
        Else
            reg = New Regex("Host not found", RegexOptions.IgnoreCase Or RegexOptions.Compiled)
            mc = reg.Match(dirResults)
            If mc.Success Then
                Return "Host not found!"
            Else
                Return ""
            End If
        End If
    End Function
'在事件中使用
     txt_mac.Text = GetMAC(txt_ip.Text)
    If Trim(txt_mac.Text) = "没有查询到MAC." Then
       txt_mac.Text = GetMAC((txt_ip.Text), "XX")
    End If