Entity-framework – Entity Framework : How to refresh the model when the db changes

entity-framework

If you build the edmx file from the database and then the db changes, how do you get the model to pick up the change?

Do you delete the whole model and regenerate or can you detect changes?

I see a post mentioning a "Update Your Model" rt. mouse command on the edmx file, but I dont see it.

Updating your edmx to reflect changes made in your db (.net linq-to-entities)

I'm just starting out.

Best Answer

Are you looking at the designer or code view? You can force the designer to open by right clicking on your EDMX file and selecting Open With -> ADO.NET Entity Data Model Designer

Right click on the designer surface of the EDMX designer and click Update Model From Database...

All entities are refreshed by default, new entities are only added if you select them.

EDIT: If it is not refreshing well.

Select all the tables and view-s in the EDMX designer.
Delete them.
Then, update model from database

Related Solutions

.net – Entity Framework vs LINQ to SQL

LINQ to SQL only supports 1 to 1 mapping of database tables, views, sprocs and functions available in Microsoft SQL Server. It's a great API to use for quick data access construction to relatively well designed SQL Server databases. LINQ2SQL was first released with C# 3.0 and .Net Framework 3.5.

LINQ to Entities (ADO.Net Entity Framework) is an ORM (Object Relational Mapper) API which allows for a broad definition of object domain models and their relationships to many different ADO.Net data providers. As such, you can mix and match a number of different database vendors, application servers or protocols to design an aggregated mash-up of objects which are constructed from a variety of tables, sources, services, etc. ADO.Net Framework was released with the .Net Framework 3.5 SP1.

This is a good introductory article on MSDN: Introducing LINQ to Relational Data

Entity-framework – How to view the SQL generated by the Entity Framework

For those using Entity Framework 6 and up, if you want to view the output SQL in Visual Studio (like I did) you have to use the new logging/interception functionality.

Adding the following line will spit out the generated SQL (along with additional execution-related details) in the Visual Studio output panel:

using (MyDatabaseEntities context = new MyDatabaseEntities())
{
    context.Database.Log = s => System.Diagnostics.Debug.WriteLine(s);
    // query the database using EF here.
}

More information about logging in EF6 in this nifty blog series: http://blog.oneunicorn.com/2013/05/08/ef6-sql-logging-part-1-simple-logging/

Note: Make sure you are running your project in DEBUG mode.

Best Answer

Related Solutions

.net – Entity Framework vs LINQ to SQL

Entity-framework – How to view the SQL generated by the Entity Framework

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