Question

public class ProductConfiguration : EntityTypeConfiguration<Product>
{
    public ProductConfiguration()
    {
        Property(p => p.Name).HasColumnName("ProductName");
    }
}

我有实体框架的产品配置。我希望通过反思来使用它。

protected override void OnModelCreating(DbModelBuilder modelBuilder)
{
        foreach (var assembly in   AppDomain.CurrentDomain.GetAssemblies().Where(a => 
                      a.GetName().Name != "EntityFramework"))
                {
                    var configTypes = assembly.GetTypes().Where(t =>
                        t.BaseType != null &&
                        t.BaseType.IsGenericType &&
                        t.BaseType.GetGenericTypeDefinition() == typeof(EntityTypeConfiguration<>));

                    foreach (var configType in configTypes)
                    {
                        if (configType.BaseType == null) continue;

                         ??????Property(p => p.Name).HasColumnName("ProductName");
                         ??????
                    }
                }
}

Answer 1

找到所有配置后，您需要创建实例并将其添加到modelBuilder.Configurations：

foreach (var configType in configTypes)
{
    if (configType.BaseType == null) continue;

     dynamic configInstance = Activator.CreateInstance(configType);
     modelBuilder.Configurations.Add(configInstance);
}

Answer 2

您不必麻烦使用反射，EF已经为您完成了：）

protected override void OnModelCreating(DbModelBuilder modelBuilder)
{
    modelBuilder.Configurations.AddFromAssembly(typeof(ProductConfiguration).Assembly);
    base.OnModelCreating(modelBuilder);
}

EntityTypeConfiguration属性方法通过反射

2 个答案: