Entity Framework apply migrations at runtime

Question

i'm creating a C# WinForms application which uses Entity Framework Code First and it is set to create the database if it doesn't exists.

Since the app is not distributed with a database, it creates it when it's needed, so i need to find a way to detect which migrations need to be applied for each case when i release a new version of the app.

How can i detect and apply needed migrations at runtime?

have you checked this SO QA? especially this link that uses DB Migrator. It still available in EF 6 so, it might relevant to your question.. — Bagus Tesa
– Bagus Tesa, Commented Dec 19, 2016 at 1:46

Rick · Accepted Answer · 2016-12-19 02:04:02Z

2

try this Initializer:System.Data.Entity.MigrateDatabaseToLatestVersion,it will update your database（no delete db,no delete data）,just update entity changed.

Database.SetInitializer(new MigrateDatabaseToLatestVersion<T, DbMigrationsConfiguration<T>>()); try { using (var ctx = new T()) { ctx.Database.Initialize(true); } } catch (Exception e) { }

answered Dec 19, 2016 at 2:04

Rick

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3 Comments

hyperar Over a year ago

I used a variation of what you proposed. Database.SetInitializer<ObjectContext>( new MigrateDatabaseToLatestVersion<ObjectContext, Configuration>());

speciesUnknown Over a year ago

Just a very slight nitpick.. empty catch blocks are no end of trouble...

Ulysses Alves Over a year ago

@gburton it's actually just the beginning of another one.

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