C# 根据设备实例路径，获取父节点（父系）的设备实例路径

我们知道有时候系统的某些设备异常，可以通过（禁用启用）重启该设备。但是某些设备操作当前设备是没起作用的，例如扬声器设备，禁用后扬声器仍然可以播放声音，但是如果禁用了该设备的父节点则不再可以播放声音。

可以从设备管理器中查看

 这里就是父节点

如果通过C#怎么获取该设备的父系实例路径呢？可以使用以下方式

/// <summary>定位到设备节点</summary>
        /// <param name="pdnDevInst"></param>
        /// <param name="pDeviceID"></param>
        /// <param name="ulFlags"></param>
        /// <returns></returns>
        [DllImport("setupapi.dll", SetLastError = true)]
        public static extern int CM_Locate_DevNodeA(ref int pdnDevInst, string pDeviceID, int ulFlags);

        /// <summary>获取节点父系</summary>
        /// <param name="pdnDevInst"></param>
        /// <param name="dnDevInst"></param>
        /// <param name="ulFlags"></param>
        /// <returns></returns>
        [DllImport("setupapi.dll")]
        public static extern int CM_Get_Parent(out uint pdnDevInst, uint dnDevInst, int ulFlags);

        /// <summary>获取节点id 长度</summary>
        /// <param name="pulLen"></param>
        /// <param name="dnDevInst"></param>
        /// <param name="flags"></param>
        /// <returns></returns>
        [DllImport("setupapi.dll", SetLastError = true)]
        public static extern int CM_Get_Device_ID_Size(out int pulLen, uint dnDevInst, int flags = 0);

        /// <summary>获取节点名称</summary>
        /// <param name="dnDevInst"></param>
        /// <param name="buffer"></param>
        /// <param name="bufferLen"></param>
        /// <param name="flags"></param>
        /// <returns></returns>
        [DllImport("setupapi.dll", CharSet = CharSet.Unicode)]
        public static extern int CM_Get_Device_ID(
          uint dnDevInst,
          char[] buffer,
          int bufferLen,
          int flags);

        /// <summary>获取设备父系</summary>
        /// <param name="deviceId">设备id</param>
        /// <param name="parentDeviceId">父系id</param>
        /// <returns></returns>
        public static bool TryGetDriverIdParent(string deviceId, out string parentDeviceId)
        {
            parentDeviceId = "";
            try
            {
                int num1 = 0;
                int num2 = 0;
                int pdnDevInst1 = 0;
                int pulLen = 0;
                uint pdnDevInst2;
                if (DeviceDrivers.CM_Locate_DevNodeA(ref pdnDevInst1, deviceId, num1) != num2 || DeviceDrivers.CM_Get_Parent(out pdnDevInst2, (uint)pdnDevInst1, num1) != num2 || DeviceDrivers.CM_Get_Device_ID_Size(out pulLen, pdnDevInst2, num1) != num2)
                    return false;
                char[] buffer = new char[pulLen];
                if (DeviceDrivers.CM_Get_Device_ID(pdnDevInst2, buffer, pulLen, 0) != num2)
                    return false;
                parentDeviceId = new string(buffer);
                return true;
            }
            catch (Exception ex)
            {
                return false;
            }
        }