Azure Mobile Service Offline Sync in Xamarin.Forms

Question

I've gone through instructions In this documentation To implement offline sync on my Xamarin.Forms client But when I pull data using sync table, I don't get the data presently in the cloud, Instead when I Read data using the normal table, I actually receive data normally, I don't understand, Here is my code to get data Using SYncTable :

/// <summary>
    /// Initialize offline sync
    /// </summary>
    /// <returns></returns>
    public async Task InitializeAsync()
    {
        if(!_client.SyncContext.IsInitialized)
        {
            _store.DefineTable<T>();
            await _client.SyncContext.InitializeAsync(_store, new MobileServiceSyncHandler());
            await SyncOfflineCacheAsync();
        }
    }

    public async Task SyncOfflineCacheAsync()
    {
        try
        {
            Debug.WriteLine("SyncOfflineCacheAsync: Initializing...");
            await InitializeAsync();

            // Push the Operations Queue to the mobile backend
            Debug.WriteLine("SyncOfflineCacheAsync: Pushing Changes");
            await _client.SyncContext.PushAsync();

            // Pull each sync table
            Debug.WriteLine("SyncOfflineCacheAsync: Pulling tags table");
            _table = _client.GetSyncTable<T>();
            string queryName = $"incsync_{typeof(T).Name}";
            await _table.PullAsync(queryName, _table.CreateQuery());
        }
        catch (MobileServicePushFailedException e )
        {
            if (e.PushResult != null)
            {
                foreach (var error in e.PushResult.Errors)
                {
                    await ResolveConflictAsync(error);
                }
            }
        }
        catch(Exception e)
        {
            throw e ;
        }
    }

I get no data previously added online

But when I get data without offline sync, it functions well

        var data = await baseAzureMobileService.NormalTable.ReadAsync();

Try calling PullAsync with null in place of queryName, that will force it to fetch all the records instead of trying to do an incremental sync. — Eric Hedstrom

Eric Hedstrom Eric Hedstrom · Accepted Answer · 2018-04-30T18:37:07

Try calling PullAsync with null in place of queryName, that will force it to fetch all the records instead of trying to do an incremental sync.

Azure Mobile Service Offline Sync in Xamarin.Forms

2 Answers