public async Task <int> SaveChangesAsync()
{
int modified = 0;
string twinJson = "";
foreach (var modifiedDevice in modelDevices.modifiedDevices)
{
if (modifiedDevice.State == EntityState.Added || modifiedDevice.State == EntityState.Modified)
{
twinJson = "{\"properties\":{\"desired\":" + modifiedDevice.Device.DesiredPropertiesToJson() + "}}";
var test = Newtonsoft.Json.JsonConvert.DeserializeObject(twinJson);
}
switch (modifiedDevice.State)
{
case EntityState.Added:
var newDevice = new Microsoft.Azure.Devices.Device(modifiedDevice.Device.Id);
newDevice = await registryManager.AddDeviceAsync(newDevice);
var twin = await registryManager.GetTwinAsync(newDevice.Id);
await registryManager.UpdateTwinAsync(newDevice.Id, twinJson, twin.ETag);
modified++;
break;
case EntityState.Modified:
var managedDevice = await registryManager.GetDeviceAsync(modifiedDevice.Device.Id);
var manageDeviceTwin = await registryManager.GetTwinAsync(modifiedDevice.Device.Id);
string etag = manageDeviceTwin.ETag;
await registryManager.UpdateTwinAsync(modifiedDevice.Device.Id, twinJson, etag);
modified++;
break;
case EntityState.Deleted:
var registered = await registryManager.GetDeviceAsync(modifiedDevice.Device.Id);
await registryManager.RemoveDeviceAsync(registered);
modified++;
break;
}
}
modelDevices.modifiedDevices.Clear();
return(modified);
}
private async Task <List <TDevice> > LoadIoTHubDevicesAsync()
{
List <TDevice> resultSet = new List <TDevice>();
devices.Clear();
string devIdQuery = "SELECT deviceId FROM devices";
var query = registryManager.CreateQuery(devIdQuery);
while (query.HasMoreResults)
{
var page = await query.GetNextAsJsonAsync();
foreach (var twin in page)
{
var jdevice = Newtonsoft.Json.JsonConvert.DeserializeObject(twin) as Newtonsoft.Json.Linq.JObject;
var deviceId = jdevice.Value <string>("DeviceId");
var registedDevice = await registryManager.GetDeviceAsync(deviceId);
var registedDeviceTwin = await registryManager.GetTwinAsync(deviceId);
var device = new TDevice()
{
Id = registedDevice.Id
};
device.SetDesiredProperties(registedDeviceTwin.Properties.Desired.ToJson());
// Set Reported Properties.
var rpJSON = (Newtonsoft.Json.Linq.JObject)Newtonsoft.Json.JsonConvert.DeserializeObject(registedDeviceTwin.Properties.Reported.ToJson(Newtonsoft.Json.Formatting.None));
rpJSON.Remove("$metadata");
rpJSON.Remove("$version");
device.Reported = Newtonsoft.Json.JsonConvert.SerializeObject(rpJSON);
devices.Add(new IoTDeviceEntry <TDevice>()
{
Device = device,
State = EntityState.Unchanged
});
resultSet.Add(device);
}
}
return(resultSet);
}