我的开发框架(WinForm)2_.NET_编程开发_程序员俱乐部

上篇文章简单的介绍了一下，我的一个开发框架。看的人还不少，多谢大家的关注，我继续介绍一下，模块和模块之间是怎么组织起来的。

Data模块：

该模块主要完成对数据的操作，采用仓储模式实现,在核心模块(Core.Data)中定义操作接口和基础类. 主要的接口有IRepository，IUnitOfWork，IDbCnnFactory。

所有的数据库操作都是针对实体进行的，一个实体在数据库中对应一个比，目前为了简化操作，不考虑实体关联的操作。这样更加容易理解，更容易上手。

一、接口的定义

1、IRepository接口，最基本、最重要的接口。通过它完成实体类的增删改查的操作。

 

class="csharpcode">

logs_code_Collapse">IRepository/// <summary>
   /// Interface IRepository
   /// </summary>
   /// <typeparam name="T">业务实体</typeparam>
   /// <typeparam name="Tid">业务实体的主键类型</typeparam>
   public interface IRepository<T, Tid> where T : EntityBase<Tid>, new()
   {
       /// <summary>
       /// 添加数据
       /// </summary>
       /// <param name="entity">The entity.</param>
       void Add(T entity);

       /// <summary>
       /// 批量添加数据
       /// </summary>
       /// <param name="entities">The entities.</param>
       void Add(IEnumerable<T> entities);

       /// <summary>
       /// 更新数据
       /// </summary>
       /// <param name="entity">The entity.</param>
       void Update(T entity);

       /// <summary>
       /// 批量更新数据
       /// </summary>
       /// <param name="entities">The entities.</param>
       void Update(IEnumerable<T> entities);

       /// <summary>
       /// Delete item
       /// </summary>
       /// <param name="entity">The entity.</param>
       void Delete(T entity);

       /// <summary>
       /// 批量删除数据
       /// </summary>
       /// <param name="entities">The entities.</param>
       void Delete(IEnumerable<T> entities);

       /// <summary>
       /// 根据主键删除数据
       /// </summary>
       /// <param name="id">The id.</param>
       void DeleteByID(object id);

       /// <summary>
       /// 删除符合条件的实体
       /// </summary>
       /// <param name="filter"></param>
       void Delete(Expression<Func<T, bool>> filter);

       /// <summary>
       /// 根据主键批量删除数据
       /// </summary>
       /// <param name="ids">The ids.</param>
       void DeleteByIDs(IEnumerable<Tid> ids);
       /// <summary>
       /// 通过ID读取数据
       /// </summary>
       /// <param name="id">The id.</param>
       /// <returns>`0.</returns>
       T GetEntityByID(object id);

       /// <summary>
       /// 获得符合条件的第一个实体
       /// </summary>
       /// <param name="filter"></param>
       T GetEntity(Expression<Func<T, bool>> filter);

       /// <summary>
       /// 开始一个工作单元
       /// </summary>
       /// <returns>IUnitOfWork.</returns>
       IUnitOfWork OpenUnitOfWork();

       /// <summary>
       /// 读取全部数据
       /// </summary>
       /// <returns>List of selected elements</returns>
       IEnumerable<T> GetEntities();


       /// <summary>
       /// 根据过滤条件读取数据
       /// </summary>
       /// <param name="filter">过滤条件</param>
       /// <returns>List of selected elements</returns>
       IEnumerable<T> GetEntities(Expression<Func<T, bool>> filter);

       /// <summary>
       /// 根据过滤条件和排序条件读取数据
       /// </summary>
       /// <typeparam name="S"></typeparam>
       /// <param name="filter">过滤条件</param>
       /// <param name="orderByExpression">排序条件</param>
       /// <param name="ascending">是否为正序</param>
       /// <returns>IEnumerable{`0}.</returns>
       IEnumerable<T> GetEntities<S>(Expression<Func<T, bool>> filter,
           Expression<Func<T, S>> orderByExpression, bool ascending = true);

       /// <summary>
       /// 分页读取数据
       /// </summary>
       /// <param name="pageIndex">页号</param>
       /// <param name="pageSize">每页大小</param>
       /// <returns>List of selected elements</returns>
       PageResult<T> GetPagedEntities(int pageIndex, int pageSize);

       /// <summary>
       /// 分页读取数据
       /// </summary>
       /// <param name="filter">过滤条件</param>
       /// <param name="pageIndex">页号</param>
       /// <param name="pageSize">每页大小</param>
       /// <returns>List of selected elements</returns>
       PageResult<T> GetPagedEntities(Expression<Func<T, bool>> filter, int pageIndex, int pageSize);

       /// <summary>
       /// 分页读取数据
       /// </summary>
       /// <typeparam name="S"></typeparam>
       /// <param name="filter">过滤条件</param>
       /// <param name="orderByExpression">排序条件</param>
       /// <param name="ascending">是否正序</param>
       /// <param name="pageIndex">页号</param>
       /// <param name="pageSize">每页大小</param>
       /// <returns>List of selected elements</returns>
       PageResult<T> GetPagedEntities<S>(Expression<Func<T, bool>> filter, Expression<Func<T, S>> orderByExpression, bool ascending, int pageIndex, int pageSize);

       /// <summary>
       /// 分页读取数据
       /// </summary>
       /// <param name="filter">sql过滤条件</param>
       /// <param name="pageIndex">页号</param>
       /// <param name="pageSize">每页大小</param>
       /// <returns>PageResult{`0}.</returns>
       PageResult<T> GetPagedEntities(string filter, int pageIndex, int pageSize);

       /// <summary>
       /// 分页读取数据
       /// </summary>
       /// <param name="filter">sql过滤条件</param>
       /// <param name="orderby">sql排序字段</param>
       /// <param name="pageIndex">页号</param>
       /// <param name="pageSize">每页大小</param>
       /// <returns>PageResult{`0}.</returns>
       PageResult<T> GetPagedEntities(string filter, string orderby, int pageIndex, int pageSize);

   }

EntityBase [Serializable]
    public class EntityBase<Tid>
    {
        /// <summary>
        /// 唯一主键
        /// </summary>
        /// <value>The id.</value>
        public Tid Id { get; set; }

        #region Override
        /// <summary>
        /// <see cref="M:System.Object.GetHashCode"/>
        /// </summary>
        /// <returns><see cref="M:System.Object.GetHashCode"/></returns>
        public override int GetHashCode()
        {
            if (this.Id.Equals(null))
            {
                return base.GetHashCode();
            }
            else
                return this.Id.GetHashCode() ^ 31;
               
        }
        /// <summary>
        /// Determines whether the specified <see cref="System.Object" /> is equal to this instance.
        /// </summary>
        /// <param name="obj">与当前的 <see cref="T:System.Object" /> 进行比较的 <see cref="T:System.Object" />。</param>
        /// <returns><c>true</c> if the specified <see cref="System.Object" /> is equal to this instance; otherwise, <c>false</c>.</returns>
        public override bool Equals(object obj)
        {
            if (obj == null || !(obj is EntityBase<Tid>))
                return false;

            if (Object.ReferenceEquals(this, obj))
                return true;

            EntityBase<Tid> item = (EntityBase<Tid>)obj;
            return item.Id.Equals(this.Id);
        }

        /// <summary>
        /// Implements the ==.
        /// </summary>
        /// <param name="left">The left.</param>
        /// <param name="right">The right.</param>
        /// <returns>The result of the operator.</returns>
        public static bool operator ==(EntityBase<Tid> left, EntityBase<Tid> right)
        {
            if (Object.Equals(left, null))
                return (Object.Equals(right, null)) ? true : false;
            else
                return left.Equals(right);
        }

        /// <summary>
        /// Implements the !=.
        /// </summary>
        /// <param name="left">The left.</param>
        /// <param name="right">The right.</param>
        /// <returns>The result of the operator.</returns>
        public static bool operator !=(EntityBase<Tid> left, EntityBase<Tid> right)
        {
            return !(left == right);
        }
        #endregion
    }

IDbCnnFactory /// <summary>
    /// Interface IDbCnnFactory
    /// </summary>
    public interface IDbCnnFactory
    {
        /// <summary>
        /// 默认的数据库键值，多数据库时用
        /// </summary>
        string DefaultDbKey { get; }

        /// <summary>
        /// 数据库提供者
        /// </summary>
        /// <value>The db provider.</value>
        string DbProvider { get; }

        /// <summary>
        /// 打开一个数据库连接
        /// </summary>
        /// <returns>IDbConnection.</returns>
        IDbConnection OpenConnection(string dbKey="");
        /// <summary>
        /// 创建一个数据库连接
        /// </summary>
        /// <returns>IDbConnection.</returns>
        IDbConnection CreateConnection(string dbKey="");
    }

IUnitOfWork /// <summary>
    /// Interface IUnitOfWork
    /// </summary>
    public interface IUnitOfWork : IDisposable
    {
        /// <summary>
        /// 提交更改
        /// </summary>
        void Commit();

        /// <summary>
        /// Begins the transition.
        /// </summary>
        /// <returns>IDisposable.</returns>
        IDisposable BeginTransition();
        /// <summary>
        /// 撤销更改
        /// </summary>
        void Rollback();
    }

Data.Oracle是针对Oracle数据库的一个实现。

Repository类实现了一下接口一个是默认ID类型的,一个是可自定义ID类型的.

public class Repository<TEntity, Tid> : IRepository<TEntity, id>,IStatRepository<TEntity,Tid>,ISqlRepository 
where TEntity : EntityBase<Tid>, new()
 
public class Repository<TEntity> : Repository<TEntity, Guid>, IRepository<TEntity>, IStatRepository<TEntity>
 where TEntity : EntityBase, new()
   

OracleDbCnnFactory 实现就比较简单了,和写ADO.Net一样.唯一注意的就是增加了MEF的导出标签

 [Export(typeof(IDbCnnFactory))] ,MEF的使用,园子里有很多好的文章,我就不班门弄斧了

三、接口的使用

     比如我设计了一个菜单类，属性主要有显示的标题、关键字、序号等。

//获得菜单类操作的Repository
   var rep = ApplicationEx.Container.GetRepository<MenuInfo>();
   //查询所有可用的菜单，并排序
    var ens=  rep.GetEntities(t => t.Enable == true).OrderBy(t=>t.PIndex);

返回的是 IEnumerable<MenuInfo>

关于ApplicationEx类，我们后面会介绍到。

通过以上这些接口,我相信90%的数据库操作,都能满足。如果你的系统对性能要求比较高的话，我建议直接写sql+ADO.Net写，执行效率会更好，也好优化。