有没有人有一个非常完整的 EF 6.1 通用存储库示例? [英] Does anyone have a very complete example generic repository for EF 6.1?

问题描述

我有自己的存储库，如下所示.但是，这并没有考虑到一些新功能，例如范围功能.有没有人有一个包含所有内容的存储库.我已经在网上搜索过这个，但我找不到任何最近的东西.这就是我所拥有的.我希望有更多的东西，并为许多方法提供 IQueryable:

I have my own repository that is as follows. However this does not take into account some of the new features such as the range features. Does anyone have a repository that includes everything. I have searched for this on the net but there's nothing that I can find that is recent. Here is what I have. I am hoping for something that has more and that offers IQueryable for many of the methods:

namespace Services.Repositories
{
    /// <summary>
    /// The EF-dependent, generic repository for data access
    /// </summary>
    /// <typeparam name="T">Type of entity for this Repository.</typeparam>
    public class GenericRepository<T> : IRepository<T> where T : class
    {
        public GenericRepository(DbContext dbContext)
        {
            if (dbContext == null) 
                throw new ArgumentNullException("An instance of DbContext is required to use this repository", "context");
            DbContext = dbContext;
            DbSet = DbContext.Set<T>();
        }

        protected DbContext DbContext { get; set; }

        protected DbSet<T> DbSet { get; set; }

        public virtual IQueryable<T> Find(Expression<Func<T, bool>> predicate)
        {
            return DbSet.Where<T>(predicate);
        }

        public virtual IQueryable<T> GetAll()
        {
            return DbSet;
        }

        public virtual T GetById(int id)
        {
            //return DbSet.FirstOrDefault(PredicateBuilder.GetByIdPredicate<T>(id));
            return DbSet.Find(id);
        }

        public virtual void Add(T entity)
        {
            DbEntityEntry dbEntityEntry = DbContext.Entry(entity);
            if (dbEntityEntry.State != EntityState.Detached)
            {
                dbEntityEntry.State = EntityState.Added;
            }
            else
            {
                DbSet.Add(entity);
            }
        }

        public virtual void Update(T entity)
        {
            DbEntityEntry dbEntityEntry = DbContext.Entry(entity);
            if (dbEntityEntry.State == EntityState.Detached)
            {
                DbSet.Attach(entity);
            }  
            dbEntityEntry.State = EntityState.Modified;
        }

        public virtual void Delete(T entity)
        {
            DbEntityEntry dbEntityEntry = DbContext.Entry(entity);
            if (dbEntityEntry.State != EntityState.Deleted)
            {
                dbEntityEntry.State = EntityState.Deleted;
            }
            else
            {
                DbSet.Attach(entity);
                DbSet.Remove(entity);
            }
        }

        public virtual void Delete(int id)
        {
            var entity = GetById(id);
            if (entity == null) return; // not found; assume already deleted.
            Delete(entity);
        }
    }
}

推荐答案

您可以像这样添加新功能:

You can add new features like this:

public virtual void AddRange(IEnumerable<T> entities)
{
    DbContext.Set<T>().AddRange(entities);
}

public virtual void RemoveRange(IEnumerable<T> entities)
{
    DbContext.Set<T>().RemoveRange(entities);
}

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