Get the primary key value of an arbitrary entity in code first

Question

Is there such a method?

object GetPrimaryKeyValue(DbEntityEntry entry);

Or how should it be implemented?

Answer 1

I am also looking to find the Primary Key of an entity. I am using Generics in my repository so I don't know the Entity until runtime. The only way I have found to do this so far is with a sql statement.

public abstract class GenericRepository : ApiController,IGenericRepository where T : class
{


    string sqlstr = @"
        SELECT COLUMN_NAME
        FROM INFORMATION_SCHEMA.KEY_COLUMN_USAGE
        WHERE OBJECTPROPERTY(OBJECT_ID(CONSTRAINT_SCHEMA + '.' + CONSTRAINT_NAME), 'IsPrimaryKey') = 1
        AND TABLE_NAME = '" + typeof(T).ToString() + "' AND TABLE_SCHEMA = 'dbo'";

    private Entities _entities = new Entities();


    public  virtual IQueryable GetAll()
    {
        DbSqlQuery queryTest = _entities.Set().SqlQuery(sqlstr);

This is just a pratial of the full class but hopefully shows the solution I am using.