如何检查设备是否位于便携式计算机上 (HTML)

本主题介绍如何查明嵌入式相机或其他嵌入式设备是在便携式计算机的前面、后面、盖还是面板中。

注意  此示例中使用的 EnclosureLocation 属性仅对于在 ACPI 表中公开此位置信息的设备用效。如果设备未在其 ACPI 表中声明此数据,则 EnclosureLocation 为空。

你需要了解的内容

技术

  • Windows Runtime

先决条件

你应该熟悉 JavaScript 和 HTML。

说明

使用 EnclosureLocation 属性

以下示例函数采用 DeviceInformation 对象并输出一条关于设备位置的消息。


function locationMessage(deviceInformation)
{
   var locationMessage = "";
   var location = deviceInformation.enclosureLocation;
   if (location == null) {
       return "The device does not specify its enclosure location.";
   }
   if (location.inDock) {
       message = "In docking station.";
   } else if (location.inLid) {
       message = "In lid.";
   } else switch (location.panel) {
       var Panel = Windows.Devices.Enumeration.Panel
       case Panel.unknown:
           locationMessage = "In unknown panel.";
           break;
       case Panel.front:
           locationMessage = "In front panel.";
           break;
       case Panel.back:
           locationMessage = "In back panel.";
           break;
       case Panel.top:
           locationMessage = "In top panel.";
           break;
       case Panel.bottom:
           locationMessage = "In bottom panel.";
           break;
       case Panel.left:
           locationMessage = "In left panel.";
           break;
       case Panel.right:
           locationMessage = "In right panel.";
           break;
       default: 
           locationMessage = "Location unknown.";
           break; 
   } 
   return locationMessage;
}

 

 

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