//Name: SetDeviceState //Inputs: string[],bool //Outputs: bool //Errors: This method may throw the following exceptions. // Failed to enumerate device tree! //Remarks: This is nearly identical to the method above except it // tries to match the hardware description against the criteria // passed in. If a match is found, that device will the be // enabled or disabled based on bEnable. public bool SetDeviceState(DEVICE_INFO deviceToChangeState, bool bEnable) { Guid myGUID = System.Guid.Empty; IntPtr hDevInfo = Native.SetupDiGetClassDevs(ref myGUID, 0, IntPtr.Zero, Native.DIGCF_ALLCLASSES | Native.DIGCF_PRESENT); if (hDevInfo.ToInt64() == Native.INVALID_HANDLE_VALUE) { throw new Exception("Could retrieve handle for device"); } Native.SP_DEVINFO_DATA DeviceInfoData; DeviceInfoData = new Native.SP_DEVINFO_DATA(); //for 32-bit, IntPtr.Size = 4 //for 64-bit, IntPtr.Size = 8 if (IntPtr.Size == 4) { DeviceInfoData.cbSize = 28; } else if (IntPtr.Size == 8) { DeviceInfoData.cbSize = 32; } //is devices exist for class DeviceInfoData.devInst = 0; DeviceInfoData.classGuid = System.Guid.Empty; DeviceInfoData.reserved = 0; UInt32 i; StringBuilder DeviceHardwareId = new StringBuilder(""); StringBuilder DeviceFriendlyName = new StringBuilder(""); DeviceHardwareId.Capacity = DeviceFriendlyName.Capacity = Native.MAX_DEV_LEN; for (i = 0; Native.SetupDiEnumDeviceInfo(hDevInfo, i, DeviceInfoData); i++) { DeviceFriendlyName.Length = DeviceHardwareId.Length = 0; //Declare vars Native.SetupDiGetDeviceRegistryProperty(hDevInfo, DeviceInfoData, Native.SPDRP_HARDWAREID, 0, DeviceHardwareId, Native.MAX_DEV_LEN, IntPtr.Zero); Native.SetupDiGetDeviceRegistryProperty(hDevInfo, DeviceInfoData, Native.SPDRP_FRIENDLYNAME, 0, DeviceFriendlyName, Native.MAX_DEV_LEN, IntPtr.Zero); Console.WriteLine(DeviceHardwareId + " -- " + DeviceFriendlyName); if (DeviceHardwareId.ToString().ToLower().Contains(deviceToChangeState.hardwareId.ToLower()) && DeviceFriendlyName.ToString().ToLower().Contains(deviceToChangeState.friendlyName.ToLower())) { Console.WriteLine("Found: " + DeviceFriendlyName); bool couldChangeState = ChangeIt(hDevInfo, DeviceInfoData, bEnable); if (!couldChangeState) { throw new Exception("make sure you have administrator privileges"); } break; } } Native.SetupDiDestroyDeviceInfoList(hDevInfo); return(true); }
//Name: ChangeIt //Inputs: pointer to hdev, SP_DEV_INFO, bool //Outputs: bool //Errors: This method may throw the following exceptions. // Unable to change device state! //Remarks: Attempts to enable or disable a device driver. // IMPORTANT NOTE!!! This code currently does not check the reboot flag. // ================= Some devices require you reboot the OS for the change // to take affect. If this describes your device, you // will need to look at the SDK call: // SetupDiGetDeviceInstallParams. You can call it // directly after ChangeIt to see whether or not you need // to reboot the OS for you change to go into effect. private bool ChangeIt(IntPtr hDevInfo, Native.SP_DEVINFO_DATA devInfoData, bool bEnable) { try { //Marshalling vars int szOfPcp; IntPtr ptrToPcp; int szDevInfoData; IntPtr ptrToDevInfoData; Native.SP_PROPCHANGE_PARAMS pcp = new Native.SP_PROPCHANGE_PARAMS(); if (bEnable) { pcp.ClassInstallHeader.cbSize = Marshal.SizeOf(typeof(Native.SP_CLASSINSTALL_HEADER)); pcp.ClassInstallHeader.InstallFunction = Native.DIF_PROPERTYCHANGE; pcp.StateChange = Native.DICS_ENABLE; pcp.Scope = Native.DICS_FLAG_GLOBAL; pcp.HwProfile = 0; //Marshal the params szOfPcp = Marshal.SizeOf(pcp); ptrToPcp = Marshal.AllocHGlobal(szOfPcp); Marshal.StructureToPtr(pcp, ptrToPcp, true); szDevInfoData = Marshal.SizeOf(devInfoData); ptrToDevInfoData = Marshal.AllocHGlobal(szDevInfoData); if (Native.SetupDiSetClassInstallParams(hDevInfo, ptrToDevInfoData, ptrToPcp, Marshal.SizeOf(typeof(Native.SP_PROPCHANGE_PARAMS)))) { Native.SetupDiCallClassInstaller(Native.DIF_PROPERTYCHANGE, hDevInfo, ptrToDevInfoData); } pcp.ClassInstallHeader.cbSize = Marshal.SizeOf(typeof(Native.SP_CLASSINSTALL_HEADER)); pcp.ClassInstallHeader.InstallFunction = Native.DIF_PROPERTYCHANGE; pcp.StateChange = Native.DICS_ENABLE; pcp.Scope = Native.DICS_FLAG_CONFIGSPECIFIC; pcp.HwProfile = 0; } else { pcp.ClassInstallHeader.cbSize = Marshal.SizeOf(typeof(Native.SP_CLASSINSTALL_HEADER)); pcp.ClassInstallHeader.InstallFunction = Native.DIF_PROPERTYCHANGE; pcp.StateChange = Native.DICS_DISABLE; pcp.Scope = Native.DICS_FLAG_CONFIGSPECIFIC; pcp.HwProfile = 0; } //Marshal the params szOfPcp = Marshal.SizeOf(pcp); ptrToPcp = Marshal.AllocHGlobal(szOfPcp); Marshal.StructureToPtr(pcp, ptrToPcp, true); szDevInfoData = Marshal.SizeOf(devInfoData); ptrToDevInfoData = Marshal.AllocHGlobal(szDevInfoData); Marshal.StructureToPtr(devInfoData, ptrToDevInfoData, true); bool rslt1 = Native.SetupDiSetClassInstallParams(hDevInfo, ptrToDevInfoData, ptrToPcp, Marshal.SizeOf(typeof(Native.SP_PROPCHANGE_PARAMS))); bool rstl2 = Native.SetupDiCallClassInstaller(Native.DIF_PROPERTYCHANGE, hDevInfo, ptrToDevInfoData); if ((!rslt1) || (!rstl2)) { throw new Exception("Unable to change device state!"); } else { return(true); } } catch (Exception) { return(false); } }
//Name: GetAll //Inputs: none //Outputs: string array //Errors: This method may throw the following errors. // Failed to enumerate device tree! // Invalid handle! //Remarks: This is code I cobbled together from a number of newsgroup threads // as well as some C++ stuff I translated off of MSDN. Seems to work. // The idea is to come up with a list of devices, same as the device // manager does. Currently it uses the actual "system" names for the // hardware. It is also possible to use hardware IDs. See the docs // for SetupDiGetDeviceRegistryProperty in the MS SDK for more details. public List <DEVICE_INFO> GetAll() { List <DEVICE_INFO> HWList = new List <DEVICE_INFO>(); try { Guid myGUID = System.Guid.Empty; IntPtr hDevInfo = Native.SetupDiGetClassDevs(ref myGUID, 0, IntPtr.Zero, Native.DIGCF_ALLCLASSES | Native.DIGCF_PRESENT); if (hDevInfo.ToInt64() == Native.INVALID_HANDLE_VALUE) { throw new Exception("Invalid Handle"); } Native.SP_DEVINFO_DATA DeviceInfoData; DeviceInfoData = new Native.SP_DEVINFO_DATA(); //for 32-bit, IntPtr.Size = 4 //for 64-bit, IntPtr.Size = 8 if (IntPtr.Size == 4) { DeviceInfoData.cbSize = 28; } else if (IntPtr.Size == 8) { DeviceInfoData.cbSize = 32; } //is devices exist for class DeviceInfoData.devInst = 0; DeviceInfoData.classGuid = System.Guid.Empty; DeviceInfoData.reserved = 0; UInt32 i; StringBuilder DeviceName = new StringBuilder(""); StringBuilder DeviceFriendlyName = new StringBuilder(""); StringBuilder DeviceHardwareId = new StringBuilder(""); StringBuilder DeviceServiceName = new StringBuilder(""); DeviceName.Capacity = DeviceFriendlyName.Capacity = DeviceHardwareId.Capacity = Native.MAX_DEV_LEN; for (i = 0; Native.SetupDiEnumDeviceInfo(hDevInfo, i, DeviceInfoData); i++) { DeviceName.Length = DeviceFriendlyName.Length = DeviceHardwareId.Length = 0; if (!Native.SetupDiGetDeviceRegistryProperty(hDevInfo, DeviceInfoData, Native.SPDRP_DEVICEDESC, 0, DeviceName, Native.MAX_DEV_LEN, IntPtr.Zero)) { continue; } Native.SetupDiGetDeviceRegistryProperty(hDevInfo, DeviceInfoData, Native.SPDRP_FRIENDLYNAME, 0, DeviceFriendlyName, Native.MAX_DEV_LEN, IntPtr.Zero); Native.SetupDiGetDeviceRegistryProperty(hDevInfo, DeviceInfoData, Native.SPDRP_HARDWAREID, 0, DeviceHardwareId, Native.MAX_DEV_LEN, IntPtr.Zero); Native.SetupDiGetDeviceRegistryProperty(hDevInfo, DeviceInfoData, Native.SPDRP_SERVICE, 0, DeviceServiceName, Native.MAX_DEV_LEN, IntPtr.Zero); UInt32 status, problem; string dstatustr = ""; DeviceStatus deviceStatus = DeviceStatus.Unknown; if (Native.CM_Get_DevNode_Status(out status, out problem, DeviceInfoData.devInst, 0) == Native.CR_SUCCESS) { deviceStatus = ((status & Native.DN_STARTED) > 0) ? DeviceStatus.Enabled : DeviceStatus.Disabled; } HWList.Add(new DEVICE_INFO { name = DeviceName.ToString(), friendlyName = DeviceFriendlyName.ToString(), hardwareId = DeviceHardwareId.ToString(), status = deviceStatus, statusstr = dstatustr, service = DeviceServiceName.ToString() }); } Native.SetupDiDestroyDeviceInfoList(hDevInfo); } catch (Exception ex) { throw new Exception("Failed to enumerate device tree!", ex); } return(HWList); }