/// <summary>
/// Test Function: Send start / stop application direct method to all connected devices.
/// </summary>
/// <param name="packageFamily">Package Family of the UWP to start / stop.</param>
/// <param name="isStart">"true" to start, "false" to stop/> instance containing the event data.</param>
private async void CallDeviceMethodStartStopAll(string packageFamily, bool isStart)
{
DeviceTwinAndMethod tempDeviceTwin;
AppxLifeCycleDataContract.ManageAppLifeCycleParams parameters = new AppxLifeCycleDataContract.ManageAppLifeCycleParams();
parameters.pkgFamilyName = packageFamily;
if (isStart)
{
parameters.action = AppxLifeCycleDataContract.JsonStart;
}
else
{
parameters.action = AppxLifeCycleDataContract.JsonStop;
}
foreach (var device in _deviceList)
{
if (device.ConnectionState != DeviceConnectionState.Connected)
{
continue; //skip devices that are not connected to IoT Hub
}
tempDeviceTwin = new DeviceTwinAndMethod(App.IOTHUBCONNSTRING, device.Id);
if (tempDeviceTwin != null)
{
CancellationToken cancellationToken = new CancellationToken();
DeviceMethodReturnValue result = await tempDeviceTwin.CallDeviceMethod(AppxLifeCycleDataContract.ManageAppLifeCycleAsync, parameters.ToJsonString(), new TimeSpan(0, 0, 30), cancellationToken);
}
}
}
/// <summary>
/// Send direct methods to device.
/// </summary>
/// <param name="method">The direct method function name.</param>
/// <param name="payload">The direct method payload.</param>
public async Task <string> CallDeviceMethod(string method, string payload)
{
CancellationToken cancellationToken = new CancellationToken();
DeviceMethodReturnValue result = await _deviceTwin.CallDeviceMethod(method, payload, new TimeSpan(0, 0, 30), cancellationToken);
ShowDialogAsync("Call Device Method", "Request: " + method + "\n" + "Status: " + result.Status + "\nReason: " + result.Payload);
return(result.Payload);
}