15、实体框架与WPF数据绑定技术详解

实体框架与WPF数据绑定技术详解

1. 仓储模式与实体框架

仓储模式用于在数据访问层(DAL)添加额外的抽象层,使其他层无法直接访问实体框架(EF)会话,而是使用DAL暴露的仓储类。一个仓储类至少应提供执行基本CRUD操作的方法集和一组基本查询方法,如下是 IRepository 接口的定义:

using System.Collections.Generic;

namespace APRESS.TimeTracker.DataLayer
{
    public interface IRepository <T> where T : EntityObject
    {
        void Insert(T entity);
        void Update(T entity);
        void Delete(T entity);
        IList<T> GetAll();
        T GetById(int id);
    }
}

为实现这些方法,我们创建一个抽象的 RepositoryBase 类作为具体仓储类的基类:

public abstract class RepositoryBase<T> : IRepository<T> where T : EntityObject
{
    private readonly IUnitOfWork unitOfWork;

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