我试图访​​问 DbSet＆LT; EntityClass＆GT; .Load（）函数加载实体。此功能不再存在于EF 6.0;在某些调查中，我发现，这是在EF扩展库中定义的扩展方法的一部分。

I am trying to access the DbSet<EntityClass>.Load() function to load the entities. This function no longer exists in EF 6.0; upon certain investigation I found that it is a part of the extension methods defined in the EF extension library.

我得到的引用的NuGet包为EF 6.0扩展库，但好像它不再支持。我试图通过调用做到这一点功能的替代 .ToList（），但在处理该方法返回我一个内部异常：

I get the reference NuGet Packages for EF 6.0 extended library but seems like it's no longer supported. I tried to do an alternative of that function by calling .ToList(), but this method upon processing returns me an inner exception:

（{列名无效。[节点名称（如果有的话）= Extent1，列名= HasErrors]}）

我仔细检查了映射类对数据库中的表，但它看起来不错。不知道我错过了什么。下面是我的映射类的code：

I double checked the mapping class against the database table, but it looks fine. Not sure what I am missing. Below is the code of my mapping class:

internal class CustomerMapping : EntityTypeConfiguration<Customer>
{
    public CustomerMapping()
    {
        this.HasKey(t => t.Id);

        this.Property(t => t.Id).HasColumnName("CUSTOMER_ID");
        this.Property(t => t.Name).HasMaxLength(30).HasColumnName("NAME");
        this.Property(t => t.Email).HasMaxLength(30).HasColumnName("EMAIL");
        this.Property(t => t.PhoneNo).HasMaxLength(100).HasColumnName("PHONE_NO");
        this.Property(t => t.MobileNo).HasMaxLength(100).HasColumnName("MOBILE_NO");
        this.Property(t => t.Address1).HasMaxLength(100).HasColumnName("ADDRESS1");
        this.Property(t => t.Address2).HasMaxLength(100).HasColumnName("ADDRESS2");
        this.Property(t => t.CustomerType).HasMaxLength(100).HasColumnName("CUSTOMER_TYPE");
        this.Property(t => t.Notes).HasMaxLength(100).HasColumnName("NOTES");

        this.ToTable("CUSTOMERS");
    }
}

下面是实际调用数据库所做的：

Below is the actual call made to the database:

internal class EntityService : IEntityService
{
    private ObservableCollection<Customer> customers;


    public DBContextManager DataBaseContext { get; set; }

    public ObservableCollection<Customer> Customers
    {
        get
        {
            if (customers == null && DataBaseContext != null)
            {
               // DataBaseContext.Set<Customer>().Load()
                DataBaseContext.Set<Customer>().ToList();
                customers = DataBaseContext.Set<Customer>().Local;

            }
            return customers;
        }
    }
}

另外请任何一个可以指出的区别了ToList（）和加载（）？

推荐答案

我发现我需要添加：

using System.Data.Entity;