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Xamarin & Azure
BFF, Really?
Benjamin Tam
Twitter: @benjamintam

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Why?
› My apps… apart from actual phone functions
› Productivity
› Google Maps
› Games
› Social Media
› Calculator!
/ Copyright ©2015 by Readify Limited2

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Azure App Services
› Mobile Services vs Mobile App
› Mobile App vs API App
› Client SDK
› Storage (including Offline Data Sync)
› Authentication
› Push Notifications
› .NET or Node.js back-end
/ Copyright ©2015 by Readify Limited3

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Demo: Xamarin.Forms Solution
/ Copyright ©2015 by Readify Limited4

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Demo: Running App
/ Copyright ©2015 by Readify Limited5

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Demo: App Service
/ Copyright ©2015 by Readify Limited6

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Demo: Mobile App
/ Copyright ©2015 by Readify Limited7

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Getting Started
› Quickstart - Easy Tables
› Node.js backend only
› “No code” CRUD API
› Code is actually in corresponding .js & .json files
› Uses OData & SQL Azure
› Debugging
› Log Stream
/ Copyright ©2015 by Readify Limited8

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Offline Data Sync
/ Copyright ©2015 by Readify Limited9

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Network Connectivity
› Is there a network connection?
› Wifi
› Cellular
› 2G, 3G, 4G
› Roaming
› What if the network status changes mid-operation?
› Xam.Plugin.Connectivity
/ Copyright ©2015 by Readify Limited10

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Device Storage
› Properties dictionary
› Local file storage
› SQLite.Net (*PCL)
/ Copyright ©2015 by Readify Limited11

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How Does Offline Data Sync Work?
› Cache server data locally
› Create/modify data locally
› Developer decides when to sync with Azure
› Push
› Pull
› Purge
› Implicit push
/ Copyright ©2015 by Readify Limited12

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Enabling Offline Data Sync
› Microsoft.Azure.Mobile.Client.SQLiteStore NuGet
› Configuration
› IMobileServiceTable vs IMobileServiceSyncTable
› Define the local store and table(s)
› Operations
› IMobileServiceSyncContext
› IMobileServiceSyncHandler
/ Copyright ©2015 by Readify Limited13

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Other Considerations
› Soft deletions
› Conflict resolution
› What to keep?
› MobileServicePushFailedException
› Performance
› Full vs Incremental Sync
› Collapse Logic
/ Copyright ©2015 by Readify Limited14

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Demo: Offline Data Sync
/ Copyright ©2015 by Readify Limited15

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Thank You!
Twitter: @benjamintam
/ Copyright ©2015 by Readify Limited16