private void button1_Click(object sender, EventArgs e)
{
//int COMName=GetComNum();
//MessageBox.Show(COMName.ToString());
HardWareOperation h = new HardWareOperation();
string name = h.GetHardWareIdFromPortName("COM9");
MessageBox.Show(name);
}
//一个调用方法GetHardWareIdFromPortName
/// <summary>
/// 通过串口号获得对应设备的硬件ID（里面包括该串口设备的vid和pid）
/// </summary>
/// <param name="portName">串口号</param>
/// <returns></returns>
public string GetHardWareIdFromPortName(string portName)
{
//先判断当前机器是否有该串口号
string[] ports = System.IO.Ports.SerialPort.GetPortNames();
int k;
//if (!DataOperator.IsContainElement(ports, portName,out k)) return null;
Guid myGUID = Guid.Empty;
string enumerator = "USB";
try
{
IntPtr hDevInfo = HardWareOperation.SetupDiGetClassDevs(ref myGUID, enumerator, IntPtr.Zero, HardWareOperation.DIGCF_ALLCLASSES | HardWareOperation.DIGCF_PRESENT);
if (hDevInfo.ToInt32() == HardWareOperation.INVALID_HANDLE_VALUE)
{
throw new Exception("没有该类设备");
}
HardWareOperation.SP_DEVINFO_DATA deviceInfoData; //想避免在api中使用ref，就把structure映射成类
deviceInfoData = new HardWareOperation.SP_DEVINFO_DATA();
deviceInfoData.cbSize = 28; //如果要使用SP_DEVINFO_DATA，一定要给该项赋值28=16+4+4+4
deviceInfoData.devInst = 0;
deviceInfoData.classGuid = System.Guid.Empty;
deviceInfoData.reserved = 0;
UInt32 i;
StringBuilder property = new StringBuilder(HardWareOperation.MAX_DEV_LEN);
for (i = 0; HardWareOperation.SetupDiEnumDeviceInfo(hDevInfo, i, deviceInfoData); i++)
{
// Console.Write(deviceInfoData.classGuid.ToString());
// HardWareOperation.SetupDiGetDeviceInstanceId(hDevInfo, deviceInfoData, porperty, (uint)porperty.Capacity, 0);
HardWareOperation.SetupDiGetDeviceRegistryProperty(hDevInfo, deviceInfoData,
(uint)HardWareOperation.SPDRP_.SPDRP_CLASS,
0, property, (uint)property.Capacity, IntPtr.Zero);
if (property.ToString().ToLower() != "ports")
{
continue; //首先看看是不是串口设备（有些USB设备不是串口设备）
}
HardWareOperation.SetupDiGetDeviceRegistryProperty(hDevInfo, deviceInfoData,
(uint)HardWareOperation.SPDRP_.SPDRP_FRIENDLYNAME,
0, property, (uint)property.Capacity, IntPtr.Zero);
if (!property.ToString().ToLower().Contains(portName.ToLower()))
{
continue; //找到对应于portName的设备
}
HardWareOperation.SetupDiGetDeviceRegistryProperty(hDevInfo, deviceInfoData,
(uint)HardWareOperation.SPDRP_.SPDRP_HARDWAREID,
0, property, (uint)property.Capacity, IntPtr.Zero);
break;
}
HardWareOperation.SetupDiDestroyDeviceInfoList(hDevInfo);
return(property.ToString());
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
return(null);
}
}
