Enterprise Library 企业库 示例（摘录）

http://www.cnblogs.com/terryfeng/archive/2009/10/03/1577711.html

protected void Button1_Click(object sender, EventArgs e)
        {
            //查询数据
            Database db = DatabaseFactory.CreateDatabase();
            this.GridView1.DataSource = db.ExecuteReader(CommandType.Text, "SELECT * FROM Projects");
            this.GridView1.DataBind();
        }

        protected void Button2_Click(object sender, EventArgs e)
        {
            //调用存储过程(直接传参数的简单调用)
            Database db = DatabaseFactory.CreateDatabase("Conn2");
            this.GridView1.DataSource = db.ExecuteReader("GetUser", "admin");
            this.GridView1.DataBind();
        }

        protected void Button3_Click(object sender, EventArgs e)
        {
            Database db = DatabaseFactory.CreateDatabase("Conn1");

            //带输出和返回参数的存储过程调用
            DbCommand cmd = db.GetStoredProcCommand("addRole");
            db.AddInParameter(cmd, "Id", DbType.Int32, DateTime.Now.Millisecond);
            db.AddInParameter(cmd, "Name", DbType.String, "技术总监");
            db.AddOutParameter(cmd, "newLastChanged", DbType.Int16, 4);
            db.AddParameter(cmd, "RecordCount", DbType.Int16, ParameterDirection.ReturnValue, "", DataRowVersion.Default, 0);
            db.ExecuteNonQuery(cmd);
            Response.Write("输出参数值：" + db.GetParameterValue(cmd, "newLastChanged").ToString());
            Response.Write("<br />返回参数值：" + db.GetParameterValue(cmd, "RecordCount").ToString());

        }

        protected void Button4_Click(object sender, EventArgs e)
        {
             //使用事务
            Database db = DatabaseFactory.CreateDatabase("Conn1");
            using (IDbConnection conn = db.CreateConnection())
            {
                conn.Open();
                IDbTransaction _trans = conn.BeginTransaction();
                try
                {
                    DbCommand _cmd = db.GetSqlStringCommand("Insert Into Roles(Id,Name) values(@Id,@Name)");
                    db.AddInParameter(_cmd, "Id", DbType.Int32, 45);
                    db.AddInParameter(_cmd, "Name", DbType.String, "UI设计");
                    db.ExecuteNonQuery(_cmd, _trans as DbTransaction);
                    db.ExecuteNonQuery(_cmd, _trans as DbTransaction);//字段上建有唯一索引，故第二次插入同样记录时会报错
                    _trans.Commit();
                }
                catch
                {
                    try
                    {
                        _trans.Rollback();//事务提交失败时，则回滚(是否回滚成功，可查看表中有无AA的记录即可)
                    }
                    catch { }
                }
                finally
                {
                    conn.Close();
                }
            }
        }

六，添加生成事件脚本，复制Config，没有Config会报错
copy "$(ProjectDir)\*.config" "$(TargetDir)"

关于缓存:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using Microsoft.Practices.EnterpriseLibrary.Caching;
using Microsoft.Practices.EnterpriseLibrary.Caching.Expirations;

namespace CachingBlock
{
  

    public class MyData
    {
        public string Name { set; get; }
        public int Age { set; get; }
        public string Color { set; get; }
    }

    public partial class WebForm1 : System.Web.UI.Page
    {
        const string KEYNAME = "myDateCache";//缓存的键值

        ICacheManager cacheManager;

        protected void Page_Load(object sender, EventArgs e)
        {
            cacheManager = CacheFactory.GetCacheManager();//实例化ICachemanager
        }

        protected void btnWrite_Click(object sender, EventArgs e)
        {
            //生成要缓存的数据(实际开发中可以是从数据库查询出来的数据)
            List<MyData> _list = new List<MyData>{ 
                new MyData(){ Age=1, Color="Yellow", Name="China"},
                new MyData{ Age=2,Color="Black",Name="USA"}
            };

            AbsoluteTime _ExpireTime = new AbsoluteTime(DateTime.Now.AddSeconds(30));//指定30秒后过期

            cacheManager.Add(KEYNAME, _list, CacheItemPriority.Normal, null, _ExpireTime);//加入缓存


            Response.Write("Cache写入完成," + DateTime.Now.ToString());
        }

        protected void btnRead_Click(object sender, EventArgs e)
        {

            this.R1.DataSource = GetCacheData();
            this.R1.DataBind();
            Response.Write("Cache加载完成," + DateTime.Now.ToString());

        }

        /// <summary>
        /// 获取缓存数据
        /// </summary>
        /// <returns></returns>
        public List<MyData> GetCacheData()
        {
            List<MyData> _cacheData = cacheManager.GetData(KEYNAME) as List<MyData>;

            if (null == _cacheData)//记得一定要加此判断(因为缓存可能过期)
            {
                //如果缓存数据为空，则重新生成数据，并加入缓存(为检测效果，特地把Color与Name前加了一个"New")
                _cacheData = new List<MyData>
                { 
                new MyData(){ Age=1, Color="New Yellow", Name="New China"},
                new MyData{ Age=2,Color="New Black",Name="New USA"}
                };

                AbsoluteTime _ExpireTime = new AbsoluteTime(DateTime.Now.AddSeconds(30));//指定30秒后过期

                cacheManager.Add(KEYNAME, _cacheData, CacheItemPriority.Normal, null, _ExpireTime);
            }

            return _cacheData;
        }

        protected void btnRemove_Click(object sender, EventArgs e)
        {
            cacheManager.Remove(KEYNAME);
            Response.Write("Cache清空完成," + DateTime.Now.ToString());
        }

    }


}