IDENTITY_INSERT during seeding with EntityFramework 6 Code-First

Question

I have an entity that has an Auto-identity (int) column. As part of the data-seed I want to use specific identifier values for the \"standard data\" in my syste

Answer 1

Say you have a table named Branch with a column of type integer named BranchId. By convention with SQL Server, EF will assume that a column with of type integer is an Identity column.

So it will automatically set the column's Identity Specification to:

• (Is Identity) Yes
• Identity Increment 1
• Identity Seed 1

If you want to seed an entity with id values that are assigned, then use the DatabaseGeneratedOption as follows:

public class Branch
{
    [Key]
    [DatabaseGenerated(DatabaseGeneratedOption.None)]
    public int BranchId { get; set; }
    public string Description { get; set; }
}

You can then seed the data and assign whatever value you want to the BranchId.