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  • 获取usb设备父系或子代

    /// <summary>
            /// 获取设备父系
            /// </summary>
            /// <param name="driver"></param>
            /// <returns></returns>
            private static bool TryGetDriverIdParent(string driver, out string resultDeviceID)
            {
                resultDeviceID = "";
                try
                {
                    int CM_LOCATE_DEVNODE_NORMAL = 0x00000000;
                    int CR_SUCCESS = 0x00000000;
                    UInt32 parentInst;
                    int curInst = 0;
                    int pLen = 0;
                    int apiResult = Win32.CM_Locate_DevNodeA(ref curInst, driver, CM_LOCATE_DEVNODE_NORMAL);
                    if (apiResult != CR_SUCCESS)
                    {
                        return false;
                    }
                    apiResult = Win32.CM_Get_Parent(out parentInst, (UInt32)curInst, CM_LOCATE_DEVNODE_NORMAL);
                    if (apiResult != CR_SUCCESS)
                    {
                        return false;
                    }
                    apiResult = Win32.CM_Get_Device_ID_Size(out pLen, parentInst, CM_LOCATE_DEVNODE_NORMAL);
                    if (apiResult != CR_SUCCESS)
                    {
                        return false;
                    }
                    char[] ptrInstanceBuf = new char[33];
                    //获取设备id字符串地址
                    apiResult = Win32.CM_Get_Device_ID(parentInst, ptrInstanceBuf, pLen, 0);
                    if (apiResult != CR_SUCCESS)
                    {
                        return false;
                    }
                    resultDeviceID = new string(ptrInstanceBuf);
                    return true;
                }
                catch (Exception ecException)
                {
                    LogHelper.WriteErrorLog("获取父代" + ecException.Message, ecException);
                    return false;
                }
            }
    
     [DllImport("setupapi.dll", SetLastError = true)]
            public static extern int CM_Locate_DevNodeA(ref int pdnDevInst, string pDeviceID, int ulFlags);
            [DllImport("setupapi.dll")]
            public static extern int CM_Get_Parent(out UInt32 pdnDevInst, UInt32 dnDevInst, int ulFlags);
            [DllImport("setupapi.dll", SetLastError = true)]
            public static extern int CM_Get_Device_ID_Size(out int pulLen, UInt32 dnDevInst, int flags = 0);
            [DllImport("setupapi.dll", CharSet = CharSet.Unicode)]
            public static extern int CM_Get_Device_ID(UInt32 dnDevInst, char[] buffer, int bufferLen, int flags);
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  • 原文地址:https://www.cnblogs.com/daxiongblog/p/6134386.html
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