/// <summary>
/// Retrieve Device Twin from given feature parameter.
/// </summary>
/// <param name="windowsObj">The json section name.</param>
/// <returns>Return the JToken object for given parameter.</returns>
public async Task <JToken> GetTwinData(string windowsObj)
{
if (_deviceTwin == null)
{
ShowDialogAsync("Device Twin Error", "No device twin found. Please reconnect to IoT Hub.");
return(null);
}
JsonConvert.DefaultSettings = () => new JsonSerializerSettings
{
CheckAdditionalContent = false
};
DeviceTwinData deviceTwinData = await _deviceTwin.GetDeviceTwinData();
if (deviceTwinData.reportedPropertiesJson == null)
{
ShowDialogAsync("Read Twin Error", windowsObj + ": Reported Twin in not valid");
return(null);
}
Debug.WriteLine("json = " + deviceTwinData.reportedPropertiesJson);
JObject desiredObject = (JObject)JsonConvert.DeserializeObject(deviceTwinData.reportedPropertiesJson);
JToken windowsToken;
if (!desiredObject.TryGetValue(DMJSonConstants.DTWindowsIoTNameSpace, out windowsToken) || windowsToken.Type != JTokenType.Object)
{
return(null);
}
JObject windowsObject = (JObject)windowsToken;
var appsJson = windowsObject[windowsObj];
if (appsJson != null)
{
return(appsJson);
}
else
{
ShowDialogAsync("Read Twin Error", windowsObj + ": Reported Twin in not valid");
return(null);
}
}
public async Task <DeviceTwinData> GetDeviceTwinData()
{
DeviceTwinData result = new DeviceTwinData();
dynamic registryManager = RegistryManager.CreateFromConnectionString(connString);
try
{
var deviceTwin = await registryManager.GetTwinAsync(deviceName);
if (deviceTwin != null)
{
result.deviceJson = deviceTwin.ToJson();
result.tagsJson = deviceTwin.Tags.ToJson();
result.reportedPropertiesJson = deviceTwin.Properties.Reported.ToJson();
result.desiredPropertiesJson = deviceTwin.Properties.Desired.ToJson();
}
}
catch (Exception ex)
{
Debug.WriteLine(ex.Message + Environment.NewLine + "Make sure you are using the latest Microsoft.Azure.Devices package.", "Device Twin Properties");
}
return(result);
}