can't generate DB from model code in entity framework

Question

I am learning EF.I have some classes of model and class that inherited from DbContext. I have intializer Initializer : DropCreateDatabaseIfModelChanges with empty method Seed.I call

 Database.SetInitializer<...Context>(new ...Initializer());

And I have set new add to connection strings

<add name="...Context" connectionString="Data Source=|DataDirectory|Temp.sdf" providerName="System.Data.SqlServerCe.4.0"/>

but I can't generate DB from this.App Data is empty. Please help me!Probably I forgot something?My method Seed I have left is empty but I don't think it's a trouble Thank u!

but I tried to design model of DB by tutorials

BeginerDummy
– BeginerDummy

2012-05-08 19:17:53 +00:00
Commented May 8, 2012 at 19:17 — BeginerDummy
– BeginerDummy, Commented May 8, 2012 at 19:17

dknaack · Accepted Answer · 2012-05-08 19:28:18Z

3

Setting a initializer is not enough. You need at least start a query.

In the moment you try to get data from your context, the process will start and if your database does not exists the will get created.

MyDbContext myDbContext = new MyDbContext();
var firstItemOfSomething = myDbContext.FirstItemOfSomething.FirstOrDefault();

edited May 8, 2012 at 19:28

answered May 8, 2012 at 19:18

dknaack

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2 Comments

BeginerDummy Over a year ago

Hi!Thanks.It helps.Actually if u know can I watch all design of this generated DB in visual studio?

dknaack Over a year ago

Yes you can open the Server Explorer and connect to your Database. If it was helpful, consider to accept my answer. But only if it was helpful.

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