SheQu/Models/FatherDAL.cs

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using System;
using System.Collections.Generic;
using System.Data;
using System.Data.Entity.Infrastructure;
using System.Linq;
using System.Linq.Expressions;
using System.Reflection;
using System.Text;
using SheQu.Models;
namespace SheQu
{
    public class FatherDAL<T> where T : class,new()
    {
        static SheQuEntities2 db = new SheQuEntities2();
        #region MyRegion
        /* /// <summary>
        /// 添加
        /// </summary>
        /// <param name="entity">实体</param>
        /// <returns></returns>
        public static T Add(T entity)
        {
            T newentity = db.Set<T>().Add(entity);

            db.SaveChanges();
            return newentity;
        }
        /// <summary>
        /// 根据条件删除
        /// </summary>
        /// <param name="lambda"></param>
        /// <returns></returns>
        public static int RemoveWhere(Expression<Func<T, bool>> lambda)
        {
            List<T> listDel = db.Set<T>().Where(lambda).ToList();
            listDel.ForEach(x =>
                 {
                     db.Set<T>().Attach(x);
                     db.Set<T>().Remove(x);
                 }
            );
            return db.SaveChanges();
        }

        /// <summary>
        /// 根据ID删除
        /// </summary>
        /// <param name="lambda"></param>
        /// <returns></returns>
        public static bool RemoveEntity(T entity)
        {
            db.Set<T>().Attach(entity);
            db.Set<T>().Remove(entity);
            return db.SaveChanges() > 0;
        }
        /// <summary>
        /// 数据上下文对象
        /// </summary>
        */