Determining which port a SD card w/reader has been assigned to

Sutton Mehaffey

15y3kC#

I am trying to find out which port an SD card w/reader has been assigned to in C#. If I use the SerialPort class (SerialPort.GetPortNames), that doesn't work. It gives me COM1 and COM3, with or without the SD card and reader inserted via USB port. I've downloaded the LibUsbDotNet Namespace, but I can't find any classes that have any Methods that seem to do what I need. It's really a disk drive access, so maybe that's different. Anybody know a way I can get information on whether an SD card has been inserted or not and what the drive name is?

Sutton

8 Replies

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Vulpes15y ago
The chances are that you were lacking a reference to System.Management.dll if Javeed's code wasn't compiling.

However, the DriveInfo.DriveType property can tell you whether its removable media such as an SD card, which may suffice if no other info is required.
Javeed M Shaikh15y ago
if you see it is using WMI to query data and which has host of other features , you can go over the documentation of WMI in MSDN, also there is an article in msdn about it:

http://msdn.microsoft.com/en-us/magazine/cc302051.aspx

but i think if you can get your results with the driveinfo class, use that.
Sutton Mehaffey15y ago
Thanks for the help. I actually can do what I need with the DriveInfo class, I think. What other information will your suggestion get me?
Javeed M Shaikh15y ago
i just tried this again and it works, can you attach your solution (check if you have references to the System.Management):

using System.Management;
using System.Management.Instrumentation;

static void Main(string[] args)
{
ManagementClass mgmt = new ManagementClass("Win32_PhysicalMedia");
ManagementObjectCollection mycoll = mgmt.GetInstances();
Console.ReadKey();
}
Sutton Mehaffey15y ago
Doesn't work. ManagementClass isn't found.

using System.Management;
using System.Management.Instrumentation;

ManagementClass mgmt = new ManagementClass("Win32_PhysicalMedia");
ManagementObjectCollection mcol = mgmt.GetInstances();
Javeed M Shaikh15y ago
This should get you started:

ManagementObjectSearcher searcher = new ManagementObjectSearcher("SELECT * FROM Win32_PhysicalMedia");

or try this:

using System.Management;

using System.Management.Instrumentation;

ManagementClass mgmt = new ManagementClass("Win32_PhysicalMedia");
ManagementObjectCollection mcol = mgmt.GetInstances();
Sutton Mehaffey15y ago
Not sure what you mean by 'what WMI am I using'. But the Win32_PhysicalMedia class looks like a good one. How do I import that? I'm using XP with Visual Studio 2010 with c#. I found a DriveInfo class that may do what I need also. But, it might not tell me what type of media is in the drive.

Sutton
Javeed M Shaikh15y ago
what is the WMI you are using is it "Win32_PhysicalMedia"