先取设备类型：
/// <summary>
/// 设备类型
/// </summary>
class DeviceClasses
{
public static Guid ClassesGuid;
public const int MAX_SIZE_DEVICE_DESCRIPTION = ;
public const int CR_SUCCESS = 0x00000000;
public const int CR_NO_SUCH_VALUE = 0x00000025;
public const int CR_INVALID_DATA = 0x0000001F;
private const int DIGCF_PRESENT = 0x00000002;
private const int DIOCR_INSTALLER = 0x00000001;
private const int MAXIMUM_ALLOWED = 0x02000000;
public const int DMI_MASK = 0x00000001;
public const int DMI_BKCOLOR = 0x00000002;
public const int DMI_USERECT = 0x00000004;
[StructLayout(LayoutKind.Sequential)]
class SP_DEVINFO_DATA
{
public int cbSize;
public Guid ClassGuid;
public int DevInst;
public ulong Reserved;
}
[DllImport("cfgmgr32.dll")]
private static extern UInt32 CM_Enumerate_Classes(UInt32 ClassIndex, ref Guid ClassGuid, UInt32 Params);
[DllImport("setupapi.dll")]
private static extern Boolean SetupDiClassNameFromGuidA(ref Guid ClassGuid, StringBuilder ClassName, UInt32 ClassNameSize, ref UInt32 RequiredSize);
[DllImport("setupapi.dll")]
private static extern IntPtr SetupDiGetClassDevsA(ref Guid ClassGuid, UInt32 Enumerator, IntPtr hwndParent, UInt32 Flags);
[DllImport("setupapi.dll")]
private static extern Boolean SetupDiDestroyDeviceInfoList(IntPtr DeviceInfoSet);
[DllImport("setupapi.dll")]
private static extern IntPtr SetupDiOpenClassRegKeyExA(ref Guid ClassGuid, UInt32 samDesired, int Flags, IntPtr MachineName, UInt32 Reserved);
[DllImport("setupapi.dll")]
private static extern Boolean SetupDiEnumDeviceInfo(IntPtr DeviceInfoSet, UInt32 MemberIndex, SP_DEVINFO_DATA DeviceInfoData);
[DllImport("advapi32.dll")]
private static extern UInt32 RegQueryValueA(IntPtr KeyClass, UInt32 SubKey, StringBuilder ClassDescription, ref UInt32 sizeB);
/// <summary>
/// 设备类型图标信息
/// </summary>
[StructLayout(LayoutKind.Sequential)]
public class SP_CLASSIMAGELIST_DATA
{
public int cbSize;
public ImageList ImageList;
public ulong Reserved;
}
public struct RECT
{
long left;
long top;
long right;
long bottom;
}
/// <summary>
/// 载入图片
/// </summary>
/// <param name="hInstance"></param>
/// <param name="Reserved"></param>
/// <returns></returns>
[DllImport("user32.dll")]
public static extern int LoadBitmapW(int hInstance, ulong Reserved);
/// <summary>
/// 获取图标
/// </summary>
/// <param name="ClassImageListData"></param>
/// <returns></returns>
[DllImport("setupapi.dll")]
public static extern Boolean SetupDiGetClassImageList(out SP_CLASSIMAGELIST_DATA ClassImageListData);
[DllImport("setupapi.dll")]
public static extern int SetupDiDrawMiniIcon(Graphics hdc, RECT rc, int MiniIconIndex, int Flags);
[DllImport("setupapi.dll")]
public static extern bool SetupDiGetClassBitmapIndex(Guid ClassGuid, out int MiniIconIndex);
[DllImport("setupapi.dll")]
public static extern int SetupDiLoadClassIcon(ref Guid classGuid, out IntPtr hIcon, out int index);
/// <summary>
/// 枚举设备类型
/// </summary>
/// <param name="ClassIndex"></param>
/// <param name="ClassName"></param>
/// <param name="ClassDescription"></param>
/// <param name="DevicePresent"></param>
/// <returns></returns>
public static int EnumerateClasses(UInt32 ClassIndex, StringBuilder ClassName, StringBuilder ClassDescription, ref bool DevicePresent)
{
Guid ClassGuid = Guid.Empty;
IntPtr NewDeviceInfoSet;
UInt32 result;
SP_DEVINFO_DATA DeviceInfoData = new SP_DEVINFO_DATA();
bool resNam = false;
UInt32 RequiredSize = ;
result = CM_Enumerate_Classes(ClassIndex, ref ClassGuid, );
DevicePresent = false;
SP_CLASSIMAGELIST_DATA imagelist = new SP_CLASSIMAGELIST_DATA();
if (result != CR_SUCCESS)
{
return (int)result;
}
resNam = SetupDiClassNameFromGuidA(ref ClassGuid, ClassName, RequiredSize, ref RequiredSize);
if (RequiredSize > )
{
ClassName.Capacity = (int)RequiredSize;
resNam = SetupDiClassNameFromGuidA(ref ClassGuid, ClassName, RequiredSize, ref RequiredSize);
}
NewDeviceInfoSet = SetupDiGetClassDevsA(ref ClassGuid, , IntPtr.Zero, DIGCF_PRESENT);
if (NewDeviceInfoSet.ToInt32() == -)
{
DevicePresent = false;
return ;
}
UInt32 numD = ;
DeviceInfoData.cbSize = ;
DeviceInfoData.DevInst = ;
DeviceInfoData.ClassGuid = System.Guid.Empty;
DeviceInfoData.Reserved = ;
Boolean res1 = SetupDiEnumDeviceInfo(
NewDeviceInfoSet,
numD,
DeviceInfoData);
if (!res1)
{
DevicePresent = false;
return ;
}
SetupDiDestroyDeviceInfoList(NewDeviceInfoSet);
IntPtr KeyClass = SetupDiOpenClassRegKeyExA(
ref ClassGuid, MAXIMUM_ALLOWED, DIOCR_INSTALLER, IntPtr.Zero, );
if (KeyClass.ToInt32() == -)
{
DevicePresent = false;
return ;
}
UInt32 sizeB = MAX_SIZE_DEVICE_DESCRIPTION;
ClassDescription.Capacity = MAX_SIZE_DEVICE_DESCRIPTION;
UInt32 res = RegQueryValueA(KeyClass, , ClassDescription, ref sizeB);
if (res != ) ClassDescription = new StringBuilder(""); //No device description
DevicePresent = true;
ClassesGuid = DeviceInfoData.ClassGuid;
return ;
}
}
再取设备信息：
class DeviceInfo
{
private const int DIGCF_PRESENT = (0x00000002);
private const int MAX_DEV_LEN = ;
private const int SPDRP_FRIENDLYNAME = (0x0000000C);
private const int SPDRP_DEVICEDESC = (0x00000000);
[StructLayout(LayoutKind.Sequential)]
private class SP_DEVINFO_DATA
{
public int cbSize;
public Guid ClassGuid;
public int DevInst;
public ulong Reserved;
};
[DllImport("setupapi.dll")]
private static extern Boolean SetupDiClassGuidsFromNameA(string ClassN, ref Guid guids, UInt32 ClassNameSize, ref UInt32 ReqSize);
[DllImport("setupapi.dll")]
private static extern IntPtr SetupDiGetClassDevsA(ref Guid ClassGuid, UInt32 Enumerator, IntPtr hwndParent, UInt32 Flags);
[DllImport("setupapi.dll")]
private static extern Boolean SetupDiEnumDeviceInfo(IntPtr DeviceInfoSet, UInt32 MemberIndex, SP_DEVINFO_DATA DeviceInfoData);
[DllImport("setupapi.dll")]
private static extern Boolean SetupDiDestroyDeviceInfoList(IntPtr DeviceInfoSet);
[DllImport("setupapi.dll")]
private static extern Boolean SetupDiGetDeviceRegistryPropertyA(IntPtr DeviceInfoSet, SP_DEVINFO_DATA DeviceInfoData, UInt32 Property, UInt32 PropertyRegDataType, StringBuilder PropertyBuffer, UInt32 PropertyBufferSize, IntPtr RequiredSize);
/// <summary>
/// 通过设备类型枚举设备信息
/// </summary>
/// <param name="DeviceIndex"></param>
/// <param name="ClassName"></param>
/// <param name="DeviceName"></param>
/// <returns></returns>
public static int EnumerateDevices(UInt32 DeviceIndex, string ClassName, StringBuilder DeviceName)
{
UInt32 RequiredSize = ;
Guid guid = Guid.Empty;
Guid[] guids = new Guid[];
IntPtr NewDeviceInfoSet;
SP_DEVINFO_DATA DeviceInfoData = new SP_DEVINFO_DATA();
bool res = SetupDiClassGuidsFromNameA(ClassName, ref guids[], RequiredSize, ref RequiredSize);
if (RequiredSize == )
{
//类型不正确
DeviceName = new StringBuilder("");
return -;
}
if (!res)
{
guids = new Guid[RequiredSize];
res = SetupDiClassGuidsFromNameA(ClassName, ref guids[], RequiredSize, ref RequiredSize);
if (!res || RequiredSize == )
{
//类型不正确
DeviceName = new StringBuilder("");
return -;
}
}
//通过类型获取设备信息
NewDeviceInfoSet = SetupDiGetClassDevsA(ref guids[], , IntPtr.Zero, DIGCF_PRESENT);
if (NewDeviceInfoSet.ToInt32() == -)
{
//设备不可用
DeviceName = new StringBuilder("");
return -;
}
DeviceInfoData.cbSize = ;
//正常状态
DeviceInfoData.DevInst = ;
DeviceInfoData.ClassGuid = System.Guid.Empty;
DeviceInfoData.Reserved = ;
res = SetupDiEnumDeviceInfo(NewDeviceInfoSet,
DeviceIndex, DeviceInfoData);
if (!res)
{
//没有设备
SetupDiDestroyDeviceInfoList(NewDeviceInfoSet);
DeviceName = new StringBuilder("");
return -;
}
DeviceName.Capacity = MAX_DEV_LEN;
if (!SetupDiGetDeviceRegistryPropertyA(NewDeviceInfoSet, DeviceInfoData,
SPDRP_FRIENDLYNAME, , DeviceName, MAX_DEV_LEN, IntPtr.Zero))
{
res = SetupDiGetDeviceRegistryPropertyA(NewDeviceInfoSet,
DeviceInfoData, SPDRP_DEVICEDESC, , DeviceName, MAX_DEV_LEN, IntPtr.Zero);
if (!res)
{
//类型不正确
SetupDiDestroyDeviceInfoList(NewDeviceInfoSet);
DeviceName = new StringBuilder("");
return -;
}
}
return ;
}
}