I’m building an app that uses SQL CE for local storage. Every time the application launches, I need to sync the local database with the main SQL Server database to get updated lookup table data.
The issue I’m running into is that Entity Framework handles mappings differently between SQL CE and SQL Server 2008. This creates complications during the sync process.
Has anyone else dealt with this mapping mismatch? Are there any tools or libraries that can handle this automatically? I’m looking for a reliable design pattern or approach to solve this synchronization challenge.
Any suggestions would be really helpful. Thanks!
I’ve dealt with this exact problem building offline apps. The mapping differences between SQL CE and SQL Server are a pain, especially with data types and constraints. Here’s what worked for me: I ditched trying to make EF handle both databases and built a custom sync layer instead. I created separate contexts for each database type and a sync service to manage data transfer between them. The trick was focusing on data contracts instead of sharing entity models. I used simple POCO classes for sync operations to move data between local and server databases. This killed the mapping headaches and gave me way better control. For lookup tables, I went with a timestamp approach - each table tracks its last sync time so you can do incremental updates instead of full refreshes every time the app launches.
been through this ef mapping hell too. try sqlbulkcopy for the sync - serialize your local data, push it up, then pull the fresh lookup data back down. much simpler than wrestling ef to work with both databases, and it handles type mismatches way better.
Interesting challenge! Have you tried Microsoft Sync Framework? What mapping issues are you running into - data types or schema mismatches? Also, why not SQLite instead of SQL CE? It’s got way better cross-platform support now.