DbContext.OnModelCreating(DbModelBuilder) Method
Definition
Important
Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.
This method is called when the model for a derived context has been initialized, but before the model has been locked down and used to initialize the context. The default implementation of this method does nothing, but it can be overridden in a derived class such that the model can be further configured before it is locked down.
protected virtual void OnModelCreating (System.Data.Entity.DbModelBuilder modelBuilder);abstract member OnModelCreating : System.Data.Entity.DbModelBuilder -> unit
override this.OnModelCreating : System.Data.Entity.DbModelBuilder -> unitProtected Overridable Sub OnModelCreating (modelBuilder As DbModelBuilder)Parameters
- modelBuilder
- DbModelBuilder
The builder that defines the model for the context being created.
Remarks
Typically, this method is called only once when the first instance of a derived context is created. The model for that context is then cached and is for all further instances of the context in the app domain. This caching can be disabled by setting the ModelCaching property on the given ModelBuilder, but note that this can seriously degrade performance. More control over caching is provided through use of the DbModelBuilder and DbContextFactory classes directly.
Applies to
Entity Framework