entity 如何为dbcontext运行时动态附加上一个dbset

Question

entitymvcdbcontext

Answer 1

参考
Creating DbSet Properties DynamicallyDbSet<MyEntity> set = context.Set<MyEntity>();或DbSet set = context.Set( typeof( MyEntity ) );或者利用反射，通过实现DbContext的OnModelCreating方法，参考
Dynamically Adding DbSet Properties in DbContext for Entity Framework Code Firstpublic class MyAppContext : DbContext
    {
        protected override void OnModelCreating(DbModelBuilder modelBuilder)
        {
            CustomAssemblySection configSection = (CustomAssemblySection)System.Configuration.ConfigurationManager.GetSection("CustomAssemblySection");
             foreach (CustomAssembly customAssembly in configSection.Assemblies)
            {
                Assembly assembly = Assembly.Load(customAssembly.Name);
                foreach (Type type in assembly.ExportedTypes)
                {
                    if (type.IsClass)
                    {
                        MethodInfo method = modelBuilder.GetType().GetMethod("Entity");
                        method = method.MakeGenericMethod(new Type[] { type });
                        method.Invoke(modelBuilder, null);
                    }
                }
            }
            base.OnModelCreating(modelBuilder);
        }
    }