Calling scalar function from c# using Entity Framework 4.0 / .edmx

Question

I would like to map my scalar function to my .edmx but it fails. I right click on my entity framework mapping, and choose update model from database. It appears in my stored

Answer 1

I've encountered same problem. And here is solution I've found my self suitable enough (tested in EF5, but should also work in EF4):

There is no support of mapping scalar-value functions out of the box but you can execute them directly.

You can also edit edmx file to make edmx generate proper method for scalar-value function, but it ll be deleted if you ll synch you model with database.

Write scalar-valued function implementation yourself:

string sqlQuery = "SELECT [dbo].[CountMeals] ({0})";
Object[] parameters = { 1 };
int activityCount = db.Database.SqlQuery(sqlQuery, parameters).FirstOrDefault();

Or edit edmx and add Xml for custom maping of scalar-valued function:

    
        SELECT [dbo].[CountActivities] (@personId)
    
    

This information was found in this blog post