public async Task RefreshAsync(T instance)
{
if (instance == null)
{
throw new ArgumentNullException("instance");
}
MobileServiceSerializer serializer = this.MobileServiceClient.Serializer;
object objId = serializer.GetId(instance, ignoreCase: false, allowDefault: true);
if (objId == null)
{
return; // refresh is not supposed to throw if your object does not have an id for some reason
}
string id = EnsureIdIsString(objId);
// Get the latest version of this element
JObject refreshed = await base.LookupAsync(id);
if (refreshed == null)
{
throw new InvalidOperationException(
string.Format(
CultureInfo.InvariantCulture,
"Item not found in local store."));
}
// Deserialize that value back into the current instance
serializer.Deserialize <T>(refreshed, instance);
}
// we don't support int id tables for offline. therefore id must be of type string
private static string EnsureIdIsString(JObject instance)
{
Arguments.IsNotNull(instance, nameof(instance));
object id = MobileServiceSerializer.GetId(instance, ignoreCase: false, allowDefault: false);
return(EnsureIdIsString(id));
}
// we don't support int id tables for offline. therefore id must be of type string
private static string EnsureIdIsString(JObject instance)
{
if (instance == null)
{
throw new ArgumentNullException("instance");
}
object id = MobileServiceSerializer.GetId(instance, ignoreCase: false, allowDefault: false);
return(EnsureIdIsString(id));
}
public async Task <JObject> InsertAsync(JObject instance)
{
object id = MobileServiceSerializer.GetId(instance, ignoreCase: false, allowDefault: true);
if (id == null)
{
id = Guid.NewGuid().ToString();
instance = (JObject)instance.DeepClone();
instance[MobileServiceSystemColumns.Id] = (string)id;
}
else
{
EnsureIdIsString(id);
}
await this.syncContext.InsertAsync(this.TableName, this.Kind, (string)id, instance);
return(instance);
}