win10uwp解决SerialDevice.FromIdAsync返回空

调用 SerialDevice.FromIdAsync 可能返回空，因为没有设置 package.appmanifest 可以使用端口

打开 package.appmanifest 文件添加下面代码

    <Capabilities>
     <DeviceCapability Name="serialcommunication">
      <Device Id="any">
       <Function Type="name:serialPort" />
      </Device>
     </DeviceCapability>
    </Capabilities>

尝试使用特定的端口访问

string aqs = SerialDevice.GetDeviceSelector("COM3");
DeviceInformationCollection dlist = await DeviceInformation.FindAllAsync(aqs);

if (dlist.Any())
{
    deviceId = dlist.First().Id;
}

using (SerialDevice serialPort = await SerialDevice.FromIdAsync(deviceId))
{

}

标签：appmanifest,FromIdAsync,aqs,dlist,win10uwp,2019,SerialDevice
来源： https://blog.51cto.com/u_11283245/2950960