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Use WMI to get MAC Address in C#

This is a snippet that can be used to retrieve the MAC address of a network adapter

Submitted By: PsychoCoder

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Views: 11,241

Language: C#

Last Modified: February 10, 2008

Instructions: Add a reference to the System.Management Namespace, call the method and the value will be returned in string format

Snippet

//Namespace reference
using System.Management;
/// <summary>
/// Returns MAC Address from first Network Card in Computer
/// </summary>
/// <returns>MAC Address in string format</returns>
public string FindMACAddress()
{
//create out management class object using the
//Win32_NetworkAdapterConfiguration class to get the attributes
//af the network adapter
ManagementClass mgmt = new ManagementClass("Win32_NetworkAdapterConfiguration");
//create our ManagementObjectCollection to get the attributes with
ManagementObjectCollection objCol = mgmt.GetInstances();
string address = String.Empty;
//loop through all the objects we find
foreach (ManagementObject obj in objCol)
{
if (address == String.Empty) // only return MAC Address from first card
{
//grab the value from the first network adapter we find
//you can change the string to an array and get all
//network adapters found as well
if ((bool)obj["IPEnabled"] == true) address = obj["MacAddress"].ToString();
}
//dispose of our object
obj.Dispose();
}
//replace the ":" with an empty space, this could also
//be removed if you wish
address = address.Replace(":", "");
//return the mac address
return address;
}

Copy & Paste

//Namespace reference
using System.Management;

/// <summary>
/// Returns MAC Address from first Network Card in Computer
/// </summary>
/// <returns>MAC Address in string format</returns>
public string FindMACAddress()
{
    //create out management class object using the
    //Win32_NetworkAdapterConfiguration class to get the attributes
    //af the network adapter
    ManagementClass mgmt = new ManagementClass("Win32_NetworkAdapterConfiguration");
    //create our ManagementObjectCollection to get the attributes with
    ManagementObjectCollection objCol = mgmt.GetInstances();
    string address = String.Empty;
    //loop through all the objects we find
    foreach (ManagementObject obj in objCol)
    {
        if (address == String.Empty)  // only return MAC Address from first card
        {
            //grab the value from the first network adapter we find
            //you can change the string to an array and get all
            //network adapters found as well
            if ((bool)obj["IPEnabled"] == true) address = obj["MacAddress"].ToString();
        }
        //dispose of our object
        obj.Dispose();
    }
    //replace the ":" with an empty space, this could also
    //be removed if you wish
    address = address.Replace(":", "");
    //return the mac address
    return address;
}